CINXE.COM

<!DOCTYPE html> <html class="client-nojs vector-feature-language-in-header-enabled vector-feature-language-in-main-page-header-disabled vector-feature-page-tools-pinned-disabled vector-feature-toc-pinned-clientpref-1 vector-feature-main-menu-pinned-disabled vector-feature-limited-width-clientpref-1 vector-feature-limited-width-content-enabled vector-feature-custom-font-size-clientpref-1 vector-feature-appearance-pinned-clientpref-1 vector-feature-night-mode-enabled skin-theme-clientpref-day vector-sticky-header-enabled vector-toc-available" lang="en" dir="ltr"> <head> <meta charset="UTF-8"> <title>Immediately dangerous to life or health - Wikipedia</title> <script>(function(){var className="client-js vector-feature-language-in-header-enabled vector-feature-language-in-main-page-header-disabled vector-feature-page-tools-pinned-disabled vector-feature-toc-pinned-clientpref-1 vector-feature-main-menu-pinned-disabled vector-feature-limited-width-clientpref-1 vector-feature-limited-width-content-enabled vector-feature-custom-font-size-clientpref-1 vector-feature-appearance-pinned-clientpref-1 vector-feature-night-mode-enabled skin-theme-clientpref-day vector-sticky-header-enabled vector-toc-available";var cookie=document.cookie.match(/(?:^|; )enwikimwclientpreferences=([^;]+)/);if(cookie){cookie[1].split('%2C').forEach(function(pref){className=className.replace(new RegExp('(^| )'+pref.replace(/-clientpref-\w+$|[^\w-]+/g,'')+'-clientpref-\\w+( |$)'),'$1'+pref+'$2');});}document.documentElement.className=className;}());RLCONF={"wgBreakFrames":false,"wgSeparatorTransformTable":["",""],"wgDigitTransformTable":["",""],"wgDefaultDateFormat":"dmy","wgMonthNames":["","January","February","March","April","May","June","July","August","September","October","November","December"],"wgRequestId":"47f08fd7-80ce-40c8-b7e7-169c71389635","wgCanonicalNamespace":"","wgCanonicalSpecialPageName":false,"wgNamespaceNumber":0,"wgPageName":"Immediately_dangerous_to_life_or_health","wgTitle":"Immediately dangerous to life or health","wgCurRevisionId":1271712210,"wgRevisionId":1271712210,"wgArticleId":1367361,"wgIsArticle":true,"wgIsRedirect":false,"wgAction":"view","wgUserName":null,"wgUserGroups":["*"],"wgCategories":["Articles with short description","Short description matches Wikidata","Webarchive template wayback links","All articles with dead external links","Articles with dead external links from December 2017","Articles with permanently dead external links","Chemical safety","Firefighting in the United States","Occupational Safety and Health Administration","National Institute for Occupational Safety and Health","Occupational safety and health"],"wgPageViewLanguage":"en","wgPageContentLanguage":"en","wgPageContentModel":"wikitext","wgRelevantPageName":"Immediately_dangerous_to_life_or_health","wgRelevantArticleId":1367361,"wgIsProbablyEditable":true,"wgRelevantPageIsProbablyEditable":true,"wgRestrictionEdit":[],"wgRestrictionMove":[],"wgRedirectedFrom":"IDLH","wgNoticeProject":"wikipedia","wgCiteReferencePreviewsActive":false,"wgFlaggedRevsParams":{"tags":{"status":{"levels":1}}},"wgMediaViewerOnClick":true,"wgMediaViewerEnabledByDefault":true,"wgPopupsFlags":0,"wgVisualEditor":{"pageLanguageCode":"en","pageLanguageDir":"ltr","pageVariantFallbacks":"en"},"wgMFDisplayWikibaseDescriptions":{"search":true,"watchlist":true,"tagline":false,"nearby":true},"wgWMESchemaEditAttemptStepOversample":false,"wgWMEPageLength":100000,"wgInternalRedirectTargetUrl":"/wiki/Immediately_dangerous_to_life_or_health","wgEditSubmitButtonLabelPublish":true,"wgULSPosition":"interlanguage","wgULSisCompactLinksEnabled":false,"wgVector2022LanguageInHeader":true,"wgULSisLanguageSelectorEmpty":false,"wgWikibaseItemId":"Q682341","wgCheckUserClientHintsHeadersJsApi":["brands","architecture","bitness","fullVersionList","mobile","model","platform","platformVersion"],"GEHomepageSuggestedEditsEnableTopics":true,"wgGETopicsMatchModeEnabled":false,"wgGELevelingUpEnabledForUser":false}; RLSTATE={"ext.globalCssJs.user.styles":"ready","site.styles":"ready","user.styles":"ready","ext.globalCssJs.user":"ready","user":"ready","user.options":"loading","ext.cite.styles":"ready","skins.vector.search.codex.styles":"ready","skins.vector.styles":"ready","skins.vector.icons":"ready","jquery.tablesorter.styles":"ready","jquery.makeCollapsible.styles":"ready","ext.wikimediamessages.styles":"ready","ext.visualEditor.desktopArticleTarget.noscript":"ready","ext.uls.interlanguage":"ready","wikibase.client.init":"ready"};RLPAGEMODULES=["mediawiki.action.view.redirect","ext.cite.ux-enhancements","mediawiki.page.media","site","mediawiki.page.ready","jquery.tablesorter","jquery.makeCollapsible","mediawiki.toc","skins.vector.js","ext.centralNotice.geoIP","ext.centralNotice.startUp","ext.gadget.ReferenceTooltips","ext.gadget.switcher","ext.urlShortener.toolbar","ext.centralauth.centralautologin","mmv.bootstrap","ext.popups","ext.visualEditor.desktopArticleTarget.init","ext.visualEditor.targetLoader","ext.echo.centralauth","ext.eventLogging","ext.wikimediaEvents","ext.navigationTiming","ext.uls.interface","ext.cx.eventlogging.campaigns","ext.cx.uls.quick.actions","wikibase.client.vector-2022","ext.checkUser.clientHints","ext.quicksurveys.init","ext.growthExperiments.SuggestedEditSession"];</script> <script>(RLQ=window.RLQ||[]).push(function(){mw.loader.impl(function(){return["user.options@12s5i",function($,jQuery,require,module){mw.user.tokens.set({"patrolToken":"+\\","watchToken":"+\\","csrfToken":"+\\"}); }];});});</script> <link rel="stylesheet" href="/w/load.php?lang=en&modules=ext.cite.styles%7Cext.uls.interlanguage%7Cext.visualEditor.desktopArticleTarget.noscript%7Cext.wikimediamessages.styles%7Cjquery.makeCollapsible.styles%7Cjquery.tablesorter.styles%7Cskins.vector.icons%2Cstyles%7Cskins.vector.search.codex.styles%7Cwikibase.client.init&only=styles&skin=vector-2022"> <script async="" src="/w/load.php?lang=en&modules=startup&only=scripts&raw=1&skin=vector-2022"></script> <meta name="ResourceLoaderDynamicStyles" content=""> <link rel="stylesheet" href="/w/load.php?lang=en&modules=site.styles&only=styles&skin=vector-2022"> <meta name="generator" content="MediaWiki 1.44.0-wmf.23"> <meta name="referrer" content="origin"> <meta name="referrer" content="origin-when-cross-origin"> <meta name="robots" content="max-image-preview:standard"> <meta name="format-detection" content="telephone=no"> <meta property="og:image" content="https://upload.wikimedia.org/wikipedia/commons/1/15/%D0%9A%D0%BE%D0%BC%D0%B1%D0%B8%D0%BD%D0%B8%D1%80%D0%BE%D0%B2%D0%B0%D0%BD%D0%BD%D1%8B%D0%B9_%D0%A1%D0%98%D0%97%D0%9E%D0%94_%D0%A8%D0%A0_%D0%B8_%D0%90%D0%94%D0%90.jpg"> <meta property="og:image:width" content="1200"> <meta property="og:image:height" content="2306"> <meta property="og:image" content="https://upload.wikimedia.org/wikipedia/commons/thumb/1/15/%D0%9A%D0%BE%D0%BC%D0%B1%D0%B8%D0%BD%D0%B8%D1%80%D0%BE%D0%B2%D0%B0%D0%BD%D0%BD%D1%8B%D0%B9_%D0%A1%D0%98%D0%97%D0%9E%D0%94_%D0%A8%D0%A0_%D0%B8_%D0%90%D0%94%D0%90.jpg/960px-%D0%9A%D0%BE%D0%BC%D0%B1%D0%B8%D0%BD%D0%B8%D1%80%D0%BE%D0%B2%D0%B0%D0%BD%D0%BD%D1%8B%D0%B9_%D0%A1%D0%98%D0%97%D0%9E%D0%94_%D0%A8%D0%A0_%D0%B8_%D0%90%D0%94%D0%90.jpg"> <meta property="og:image:width" content="800"> <meta property="og:image:height" content="1537"> <meta property="og:image:width" content="640"> <meta property="og:image:height" content="1230"> <meta name="viewport" content="width=1120"> <meta property="og:title" content="Immediately dangerous to life or health - Wikipedia"> <meta property="og:type" content="website"> <link rel="preconnect" href="//upload.wikimedia.org"> <link rel="alternate" media="only screen and (max-width: 640px)" href="//en.m.wikipedia.org/wiki/Immediately_dangerous_to_life_or_health"> <link rel="alternate" type="application/x-wiki" title="Edit this page" href="/w/index.php?title=Immediately_dangerous_to_life_or_health&action=edit"> <link rel="apple-touch-icon" href="/static/apple-touch/wikipedia.png"> <link rel="icon" href="/static/favicon/wikipedia.ico"> <link rel="search" type="application/opensearchdescription+xml" href="/w/rest.php/v1/search" title="Wikipedia (en)"> <link rel="EditURI" type="application/rsd+xml" href="//en.wikipedia.org/w/api.php?action=rsd"> <link rel="canonical" href="https://en.wikipedia.org/wiki/Immediately_dangerous_to_life_or_health"> <link rel="license" href="https://creativecommons.org/licenses/by-sa/4.0/deed.en"> <link rel="alternate" type="application/atom+xml" title="Wikipedia Atom feed" href="/w/index.php?title=Special:RecentChanges&feed=atom"> <link rel="dns-prefetch" href="//meta.wikimedia.org" /> <link rel="dns-prefetch" href="auth.wikimedia.org"> </head> <body class="skin--responsive skin-vector skin-vector-search-vue mediawiki ltr sitedir-ltr mw-hide-empty-elt ns-0 ns-subject mw-editable page-Immediately_dangerous_to_life_or_health rootpage-Immediately_dangerous_to_life_or_health skin-vector-2022 action-view"><a class="mw-jump-link" href="#bodyContent">Jump to content</a> <div class="vector-header-container"> <header class="vector-header mw-header"> <div class="vector-header-start"> <nav class="vector-main-menu-landmark" aria-label="Site"> <div id="vector-main-menu-dropdown" class="vector-dropdown vector-main-menu-dropdown vector-button-flush-left vector-button-flush-right" title="Main menu" > <input type="checkbox" id="vector-main-menu-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-main-menu-dropdown" class="vector-dropdown-checkbox " aria-label="Main menu" > <label id="vector-main-menu-dropdown-label" for="vector-main-menu-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-menu mw-ui-icon-wikimedia-menu"></span> <span class="vector-dropdown-label-text">Main menu</span> </label> <div class="vector-dropdown-content"> <div id="vector-main-menu-unpinned-container" class="vector-unpinned-container"> <div id="vector-main-menu" class="vector-main-menu vector-pinnable-element"> <div class="vector-pinnable-header vector-main-menu-pinnable-header vector-pinnable-header-unpinned" data-feature-name="main-menu-pinned" data-pinnable-element-id="vector-main-menu" data-pinned-container-id="vector-main-menu-pinned-container" data-unpinned-container-id="vector-main-menu-unpinned-container" > <div class="vector-pinnable-header-label">Main menu</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-main-menu.pin">move to sidebar</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-main-menu.unpin">hide</button> </div> <div id="p-navigation" class="vector-menu mw-portlet mw-portlet-navigation" > <div class="vector-menu-heading"> Navigation </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="n-mainpage-description" class="mw-list-item"><a href="/wiki/Main_Page" title="Visit the main page [z]" accesskey="z"><span>Main page</span></a></li><li id="n-contents" class="mw-list-item"><a href="/wiki/Wikipedia:Contents" title="Guides to browsing Wikipedia"><span>Contents</span></a></li><li id="n-currentevents" class="mw-list-item"><a href="/wiki/Portal:Current_events" title="Articles related to current events"><span>Current events</span></a></li><li id="n-randompage" class="mw-list-item"><a href="/wiki/Special:Random" title="Visit a randomly selected article [x]" accesskey="x"><span>Random article</span></a></li><li id="n-aboutsite" class="mw-list-item"><a href="/wiki/Wikipedia:About" title="Learn about Wikipedia and how it works"><span>About Wikipedia</span></a></li><li id="n-contactpage" class="mw-list-item"><a href="//en.wikipedia.org/wiki/Wikipedia:Contact_us" title="How to contact Wikipedia"><span>Contact us</span></a></li> </ul> </div> </div> <div id="p-interaction" class="vector-menu mw-portlet mw-portlet-interaction" > <div class="vector-menu-heading"> Contribute </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="n-help" class="mw-list-item"><a href="/wiki/Help:Contents" title="Guidance on how to use and edit Wikipedia"><span>Help</span></a></li><li id="n-introduction" class="mw-list-item"><a href="/wiki/Help:Introduction" title="Learn how to edit Wikipedia"><span>Learn to edit</span></a></li><li id="n-portal" class="mw-list-item"><a href="/wiki/Wikipedia:Community_portal" title="The hub for editors"><span>Community portal</span></a></li><li id="n-recentchanges" class="mw-list-item"><a href="/wiki/Special:RecentChanges" title="A list of recent changes to Wikipedia [r]" accesskey="r"><span>Recent changes</span></a></li><li id="n-upload" class="mw-list-item"><a href="/wiki/Wikipedia:File_upload_wizard" title="Add images or other media for use on Wikipedia"><span>Upload file</span></a></li><li id="n-specialpages" class="mw-list-item"><a href="/wiki/Special:SpecialPages"><span>Special pages</span></a></li> </ul> </div> </div> </div> </div> </div> </div> </nav> <a href="/wiki/Main_Page" class="mw-logo"> <img class="mw-logo-icon" src="/static/images/icons/wikipedia.png" alt="" aria-hidden="true" height="50" width="50"> <span class="mw-logo-container skin-invert"> <img class="mw-logo-wordmark" alt="Wikipedia" src="/static/images/mobile/copyright/wikipedia-wordmark-en.svg" style="width: 7.5em; height: 1.125em;"> <img class="mw-logo-tagline" alt="The Free Encyclopedia" src="/static/images/mobile/copyright/wikipedia-tagline-en.svg" width="117" height="13" style="width: 7.3125em; height: 0.8125em;"> </span> </a> </div> <div class="vector-header-end"> <div id="p-search" role="search" class="vector-search-box-vue vector-search-box-collapses vector-search-box-show-thumbnail vector-search-box-auto-expand-width vector-search-box"> <a href="/wiki/Special:Search" class="cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only search-toggle" title="Search Wikipedia [f]" accesskey="f"><span class="vector-icon mw-ui-icon-search mw-ui-icon-wikimedia-search"></span> <span>Search</span> </a> <div class="vector-typeahead-search-container"> <div class="cdx-typeahead-search cdx-typeahead-search--show-thumbnail cdx-typeahead-search--auto-expand-width"> <form action="/w/index.php" id="searchform" class="cdx-search-input cdx-search-input--has-end-button"> <div id="simpleSearch" class="cdx-search-input__input-wrapper" data-search-loc="header-moved"> <div class="cdx-text-input cdx-text-input--has-start-icon"> <input class="cdx-text-input__input" type="search" name="search" placeholder="Search Wikipedia" aria-label="Search Wikipedia" autocapitalize="sentences" title="Search Wikipedia [f]" accesskey="f" id="searchInput" > <span class="cdx-text-input__icon cdx-text-input__start-icon"></span> </div> <input type="hidden" name="title" value="Special:Search"> </div> <button class="cdx-button cdx-search-input__end-button">Search</button> </form> </div> </div> </div> <nav class="vector-user-links vector-user-links-wide" aria-label="Personal tools"> <div class="vector-user-links-main"> <div id="p-vector-user-menu-preferences" class="vector-menu mw-portlet emptyPortlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> </ul> </div> </div> <div id="p-vector-user-menu-userpage" class="vector-menu mw-portlet emptyPortlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> </ul> </div> </div> <nav class="vector-appearance-landmark" aria-label="Appearance"> <div id="vector-appearance-dropdown" class="vector-dropdown " title="Change the appearance of the page's font size, width, and color" > <input type="checkbox" id="vector-appearance-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-appearance-dropdown" class="vector-dropdown-checkbox " aria-label="Appearance" > <label id="vector-appearance-dropdown-label" for="vector-appearance-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-appearance mw-ui-icon-wikimedia-appearance"></span> <span class="vector-dropdown-label-text">Appearance</span> </label> <div class="vector-dropdown-content"> <div id="vector-appearance-unpinned-container" class="vector-unpinned-container"> </div> </div> </div> </nav> <div id="p-vector-user-menu-notifications" class="vector-menu mw-portlet emptyPortlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> </ul> </div> </div> <div id="p-vector-user-menu-overflow" class="vector-menu mw-portlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="pt-sitesupport-2" class="user-links-collapsible-item mw-list-item user-links-collapsible-item"><a data-mw="interface" href="https://donate.wikimedia.org/?wmf_source=donate&wmf_medium=sidebar&wmf_campaign=en.wikipedia.org&uselang=en" class=""><span>Donate</span></a> </li> <li id="pt-createaccount-2" class="user-links-collapsible-item mw-list-item user-links-collapsible-item"><a data-mw="interface" href="/w/index.php?title=Special:CreateAccount&returnto=Immediately+dangerous+to+life+or+health" title="You are encouraged to create an account and log in; however, it is not mandatory" class=""><span>Create account</span></a> </li> <li id="pt-login-2" class="user-links-collapsible-item mw-list-item user-links-collapsible-item"><a data-mw="interface" href="/w/index.php?title=Special:UserLogin&returnto=Immediately+dangerous+to+life+or+health" title="You're encouraged to log in; however, it's not mandatory. [o]" accesskey="o" class=""><span>Log in</span></a> </li> </ul> </div> </div> </div> <div id="vector-user-links-dropdown" class="vector-dropdown vector-user-menu vector-button-flush-right vector-user-menu-logged-out" title="Log in and more options" > <input type="checkbox" id="vector-user-links-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-user-links-dropdown" class="vector-dropdown-checkbox " aria-label="Personal tools" > <label id="vector-user-links-dropdown-label" for="vector-user-links-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-ellipsis mw-ui-icon-wikimedia-ellipsis"></span> <span class="vector-dropdown-label-text">Personal tools</span> </label> <div class="vector-dropdown-content"> <div id="p-personal" class="vector-menu mw-portlet mw-portlet-personal user-links-collapsible-item" title="User menu" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="pt-sitesupport" class="user-links-collapsible-item mw-list-item"><a href="https://donate.wikimedia.org/?wmf_source=donate&wmf_medium=sidebar&wmf_campaign=en.wikipedia.org&uselang=en"><span>Donate</span></a></li><li id="pt-createaccount" class="user-links-collapsible-item mw-list-item"><a href="/w/index.php?title=Special:CreateAccount&returnto=Immediately+dangerous+to+life+or+health" title="You are encouraged to create an account and log in; however, it is not mandatory"><span class="vector-icon mw-ui-icon-userAdd mw-ui-icon-wikimedia-userAdd"></span> <span>Create account</span></a></li><li id="pt-login" class="user-links-collapsible-item mw-list-item"><a href="/w/index.php?title=Special:UserLogin&returnto=Immediately+dangerous+to+life+or+health" title="You're encouraged to log in; however, it's not mandatory. [o]" accesskey="o"><span class="vector-icon mw-ui-icon-logIn mw-ui-icon-wikimedia-logIn"></span> <span>Log in</span></a></li> </ul> </div> </div> <div id="p-user-menu-anon-editor" class="vector-menu mw-portlet mw-portlet-user-menu-anon-editor" > <div class="vector-menu-heading"> Pages for logged out editors <a href="/wiki/Help:Introduction" aria-label="Learn more about editing"><span>learn more</span></a> </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="pt-anoncontribs" class="mw-list-item"><a href="/wiki/Special:MyContributions" title="A list of edits made from this IP address [y]" accesskey="y"><span>Contributions</span></a></li><li id="pt-anontalk" class="mw-list-item"><a href="/wiki/Special:MyTalk" title="Discussion about edits from this IP address [n]" accesskey="n"><span>Talk</span></a></li> </ul> </div> </div> </div> </div> </nav> </div> </header> </div> <div class="mw-page-container"> <div class="mw-page-container-inner"> <div class="vector-sitenotice-container"> <div id="siteNotice"></div> </div> <div class="vector-column-start"> <div class="vector-main-menu-container"> <div id="mw-navigation"> <nav id="mw-panel" class="vector-main-menu-landmark" aria-label="Site"> <div id="vector-main-menu-pinned-container" class="vector-pinned-container"> </div> </nav> </div> </div> <div class="vector-sticky-pinned-container"> <nav id="mw-panel-toc" aria-label="Contents" data-event-name="ui.sidebar-toc" class="mw-table-of-contents-container vector-toc-landmark"> <div id="vector-toc-pinned-container" class="vector-pinned-container"> <div id="vector-toc" class="vector-toc vector-pinnable-element"> <div class="vector-pinnable-header vector-toc-pinnable-header vector-pinnable-header-pinned" data-feature-name="toc-pinned" data-pinnable-element-id="vector-toc" > <h2 class="vector-pinnable-header-label">Contents</h2> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-toc.pin">move to sidebar</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-toc.unpin">hide</button> </div> <ul class="vector-toc-contents" id="mw-panel-toc-list"> <li id="toc-mw-content-text" class="vector-toc-list-item vector-toc-level-1"> <a href="#" class="vector-toc-link"> <div class="vector-toc-text">(Top)</div> </a> </li> <li id="toc-NIOSH_respirator_selection_logic" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#NIOSH_respirator_selection_logic"> <div class="vector-toc-text"> <span class="vector-toc-numb">1</span> <span>NIOSH respirator selection logic</span> </div> </a> <ul id="toc-NIOSH_respirator_selection_logic-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-IDLH_values" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#IDLH_values"> <div class="vector-toc-text"> <span class="vector-toc-numb">2</span> <span>IDLH values</span> </div> </a> <ul id="toc-IDLH_values-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-See_also" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#See_also"> <div class="vector-toc-text"> <span class="vector-toc-numb">3</span> <span>See also</span> </div> </a> <ul id="toc-See_also-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-References" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#References"> <div class="vector-toc-text"> <span class="vector-toc-numb">4</span> <span>References</span> </div> </a> <ul id="toc-References-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-External_links" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#External_links"> <div class="vector-toc-text"> <span class="vector-toc-numb">5</span> <span>External links</span> </div> </a> <ul id="toc-External_links-sublist" class="vector-toc-list"> </ul> </li> </ul> </div> </div> </nav> </div> </div> <div class="mw-content-container"> <main id="content" class="mw-body"> <header class="mw-body-header vector-page-titlebar"> <nav aria-label="Contents" class="vector-toc-landmark"> <div id="vector-page-titlebar-toc" class="vector-dropdown vector-page-titlebar-toc vector-button-flush-left" title="Table of Contents" > <input type="checkbox" id="vector-page-titlebar-toc-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-page-titlebar-toc" class="vector-dropdown-checkbox " aria-label="Toggle the table of contents" > <label id="vector-page-titlebar-toc-label" for="vector-page-titlebar-toc-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-listBullet mw-ui-icon-wikimedia-listBullet"></span> <span class="vector-dropdown-label-text">Toggle the table of contents</span> </label> <div class="vector-dropdown-content"> <div id="vector-page-titlebar-toc-unpinned-container" class="vector-unpinned-container"> </div> </div> </div> </nav> <h1 id="firstHeading" class="firstHeading mw-first-heading"><span class="mw-page-title-main">Immediately dangerous to life or health</span></h1> <div id="p-lang-btn" class="vector-dropdown mw-portlet mw-portlet-lang" > <input type="checkbox" id="p-lang-btn-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-p-lang-btn" class="vector-dropdown-checkbox mw-interlanguage-selector" aria-label="Go to an article in another language. Available in 11 languages" > <label id="p-lang-btn-label" for="p-lang-btn-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--action-progressive mw-portlet-lang-heading-11" aria-hidden="true" ><span class="vector-icon mw-ui-icon-language-progressive mw-ui-icon-wikimedia-language-progressive"></span> <span class="vector-dropdown-label-text">11 languages</span> </label> <div class="vector-dropdown-content"> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="interlanguage-link interwiki-ar mw-list-item"><a href="https://ar.wikipedia.org/wiki/%D8%AE%D8%B7%D9%88%D8%B1%D8%A9_%D9%81%D9%88%D8%B1%D9%8A%D8%A9_%D8%B9%D9%84%D9%89_%D8%A7%D9%84%D8%AD%D9%8A%D8%A7%D8%A9_%D8%A3%D9%88_%D8%A7%D9%84%D8%B5%D8%AD%D8%A9" title="خطورة فورية على الحياة أو الصحة – Arabic" lang="ar" hreflang="ar" data-title="خطورة فورية على الحياة أو الصحة" data-language-autonym="العربية" data-language-local-name="Arabic" class="interlanguage-link-target"><span>العربية</span></a></li><li class="interlanguage-link interwiki-ca mw-list-item"><a href="https://ca.wikipedia.org/wiki/Immediatament_perill%C3%B3s_per_a_la_vida_o_la_salut" title="Immediatament perillós per a la vida o la salut – Catalan" lang="ca" hreflang="ca" data-title="Immediatament perillós per a la vida o la salut" data-language-autonym="Català" data-language-local-name="Catalan" class="interlanguage-link-target"><span>Català</span></a></li><li class="interlanguage-link interwiki-da mw-list-item"><a href="https://da.wikipedia.org/wiki/IDLH" title="IDLH – Danish" lang="da" hreflang="da" data-title="IDLH" data-language-autonym="Dansk" data-language-local-name="Danish" class="interlanguage-link-target"><span>Dansk</span></a></li><li class="interlanguage-link interwiki-de mw-list-item"><a href="https://de.wikipedia.org/wiki/IDLH" title="IDLH – German" lang="de" hreflang="de" data-title="IDLH" data-language-autonym="Deutsch" data-language-local-name="German" class="interlanguage-link-target"><span>Deutsch</span></a></li><li class="interlanguage-link interwiki-fr mw-list-item"><a href="https://fr.wikipedia.org/wiki/Danger_imm%C3%A9diat_pour_la_vie_ou_la_sant%C3%A9" title="Danger immédiat pour la vie ou la santé – French" lang="fr" hreflang="fr" data-title="Danger immédiat pour la vie ou la santé" data-language-autonym="Français" data-language-local-name="French" class="interlanguage-link-target"><span>Français</span></a></li><li class="interlanguage-link interwiki-it mw-list-item"><a href="https://it.wikipedia.org/wiki/IDLH" title="IDLH – Italian" lang="it" hreflang="it" data-title="IDLH" data-language-autonym="Italiano" data-language-local-name="Italian" class="interlanguage-link-target"><span>Italiano</span></a></li><li class="interlanguage-link interwiki-ru mw-list-item"><a href="https://ru.wikipedia.org/wiki/%D0%9A%D0%BE%D0%BD%D1%86%D0%B5%D0%BD%D1%82%D1%80%D0%B0%D1%86%D0%B8%D1%8F_%D0%B2%D1%80%D0%B5%D0%B4%D0%BD%D1%8B%D1%85_%D0%B2%D0%B5%D1%89%D0%B5%D1%81%D1%82%D0%B2,_%D0%BC%D0%B3%D0%BD%D0%BE%D0%B2%D0%B5%D0%BD%D0%BD%D0%BE-%D0%BE%D0%BF%D0%B0%D1%81%D0%BD%D0%B0%D1%8F_%D0%B4%D0%BB%D1%8F_%D0%B6%D0%B8%D0%B7%D0%BD%D0%B8_%D0%B8%D0%BB%D0%B8_%D0%B7%D0%B4%D0%BE%D1%80%D0%BE%D0%B2%D1%8C%D1%8F" title="Концентрация вредных веществ, мгновенно-опасная для жизни или здоровья – Russian" lang="ru" hreflang="ru" data-title="Концентрация вредных веществ, мгновенно-опасная для жизни или здоровья" data-language-autonym="Русский" data-language-local-name="Russian" class="interlanguage-link-target"><span>Русский</span></a></li><li class="interlanguage-link interwiki-simple mw-list-item"><a href="https://simple.wikipedia.org/wiki/Immediately_dangerous_to_life_or_health" title="Immediately dangerous to life or health – Simple English" lang="en-simple" hreflang="en-simple" data-title="Immediately dangerous to life or health" data-language-autonym="Simple English" data-language-local-name="Simple English" class="interlanguage-link-target"><span>Simple English</span></a></li><li class="interlanguage-link interwiki-sr mw-list-item"><a href="https://sr.wikipedia.org/wiki/Neposredno_opasno_po_%C5%BEivot_ili_zdravlje" title="Neposredno opasno po život ili zdravlje – Serbian" lang="sr" hreflang="sr" data-title="Neposredno opasno po život ili zdravlje" data-language-autonym="Српски / srpski" data-language-local-name="Serbian" class="interlanguage-link-target"><span>Српски / srpski</span></a></li><li class="interlanguage-link interwiki-tr mw-list-item"><a href="https://tr.wikipedia.org/wiki/IDLH" title="IDLH – Turkish" lang="tr" hreflang="tr" data-title="IDLH" data-language-autonym="Türkçe" data-language-local-name="Turkish" class="interlanguage-link-target"><span>Türkçe</span></a></li><li class="interlanguage-link interwiki-uk mw-list-item"><a href="https://uk.wikipedia.org/wiki/%D0%9A%D0%BE%D0%BD%D1%86%D0%B5%D0%BD%D1%82%D1%80%D0%B0%D1%86%D1%96%D1%8F_%D1%88%D0%BA%D1%96%D0%B4%D0%BB%D0%B8%D0%B2%D0%B8%D1%85_%D1%80%D0%B5%D1%87%D0%BE%D0%B2%D0%B8%D0%BD,_%D0%BC%D0%B8%D1%82%D1%82%D1%94%D0%B2%D0%BE-%D0%BD%D0%B5%D0%B1%D0%B5%D0%B7%D0%BF%D0%B5%D1%87%D0%BD%D0%B0_%D0%B4%D0%BB%D1%8F_%D0%B6%D0%B8%D1%82%D1%82%D1%8F_%D1%87%D0%B8_%D0%B7%D0%B4%D0%BE%D1%80%D0%BE%D0%B2%27%D1%8F" title="Концентрація шкідливих речовин, миттєво-небезпечна для життя чи здоров'я – Ukrainian" lang="uk" hreflang="uk" data-title="Концентрація шкідливих речовин, миттєво-небезпечна для життя чи здоров'я" data-language-autonym="Українська" data-language-local-name="Ukrainian" class="interlanguage-link-target"><span>Українська</span></a></li> </ul> <div class="after-portlet after-portlet-lang"><span class="wb-langlinks-edit wb-langlinks-link"><a href="https://www.wikidata.org/wiki/Special:EntityPage/Q682341#sitelinks-wikipedia" title="Edit interlanguage links" class="wbc-editpage">Edit links</a></span></div> </div> </div> </div> </header> <div class="vector-page-toolbar"> <div class="vector-page-toolbar-container"> <div id="left-navigation"> <nav aria-label="Namespaces"> <div id="p-associated-pages" class="vector-menu vector-menu-tabs mw-portlet mw-portlet-associated-pages" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-nstab-main" class="selected vector-tab-noicon mw-list-item"><a href="/wiki/Immediately_dangerous_to_life_or_health" title="View the content page [c]" accesskey="c"><span>Article</span></a></li><li id="ca-talk" class="vector-tab-noicon mw-list-item"><a href="/wiki/Talk:Immediately_dangerous_to_life_or_health" rel="discussion" title="Discuss improvements to the content page [t]" accesskey="t"><span>Talk</span></a></li> </ul> </div> </div> <div id="vector-variants-dropdown" class="vector-dropdown emptyPortlet" > <input type="checkbox" id="vector-variants-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-variants-dropdown" class="vector-dropdown-checkbox " aria-label="Change language variant" > <label id="vector-variants-dropdown-label" for="vector-variants-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet" aria-hidden="true" ><span class="vector-dropdown-label-text">English</span> </label> <div class="vector-dropdown-content"> <div id="p-variants" class="vector-menu mw-portlet mw-portlet-variants emptyPortlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> </ul> </div> </div> </div> </div> </nav> </div> <div id="right-navigation" class="vector-collapsible"> <nav aria-label="Views"> <div id="p-views" class="vector-menu vector-menu-tabs mw-portlet mw-portlet-views" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-view" class="selected vector-tab-noicon mw-list-item"><a href="/wiki/Immediately_dangerous_to_life_or_health"><span>Read</span></a></li><li id="ca-edit" class="vector-tab-noicon mw-list-item"><a href="/w/index.php?title=Immediately_dangerous_to_life_or_health&action=edit" title="Edit this page [e]" accesskey="e"><span>Edit</span></a></li><li id="ca-history" class="vector-tab-noicon mw-list-item"><a href="/w/index.php?title=Immediately_dangerous_to_life_or_health&action=history" title="Past revisions of this page [h]" accesskey="h"><span>View history</span></a></li> </ul> </div> </div> </nav> <nav class="vector-page-tools-landmark" aria-label="Page tools"> <div id="vector-page-tools-dropdown" class="vector-dropdown vector-page-tools-dropdown" > <input type="checkbox" id="vector-page-tools-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-page-tools-dropdown" class="vector-dropdown-checkbox " aria-label="Tools" > <label id="vector-page-tools-dropdown-label" for="vector-page-tools-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet" aria-hidden="true" ><span class="vector-dropdown-label-text">Tools</span> </label> <div class="vector-dropdown-content"> <div id="vector-page-tools-unpinned-container" class="vector-unpinned-container"> <div id="vector-page-tools" class="vector-page-tools vector-pinnable-element"> <div class="vector-pinnable-header vector-page-tools-pinnable-header vector-pinnable-header-unpinned" data-feature-name="page-tools-pinned" data-pinnable-element-id="vector-page-tools" data-pinned-container-id="vector-page-tools-pinned-container" data-unpinned-container-id="vector-page-tools-unpinned-container" > <div class="vector-pinnable-header-label">Tools</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-page-tools.pin">move to sidebar</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-page-tools.unpin">hide</button> </div> <div id="p-cactions" class="vector-menu mw-portlet mw-portlet-cactions emptyPortlet vector-has-collapsible-items" title="More options" > <div class="vector-menu-heading"> Actions </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-more-view" class="selected vector-more-collapsible-item mw-list-item"><a href="/wiki/Immediately_dangerous_to_life_or_health"><span>Read</span></a></li><li id="ca-more-edit" class="vector-more-collapsible-item mw-list-item"><a href="/w/index.php?title=Immediately_dangerous_to_life_or_health&action=edit" title="Edit this page [e]" accesskey="e"><span>Edit</span></a></li><li id="ca-more-history" class="vector-more-collapsible-item mw-list-item"><a href="/w/index.php?title=Immediately_dangerous_to_life_or_health&action=history"><span>View history</span></a></li> </ul> </div> </div> <div id="p-tb" class="vector-menu mw-portlet mw-portlet-tb" > <div class="vector-menu-heading"> General </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="t-whatlinkshere" class="mw-list-item"><a href="/wiki/Special:WhatLinksHere/Immediately_dangerous_to_life_or_health" title="List of all English Wikipedia pages containing links to this page [j]" accesskey="j"><span>What links here</span></a></li><li id="t-recentchangeslinked" class="mw-list-item"><a href="/wiki/Special:RecentChangesLinked/Immediately_dangerous_to_life_or_health" rel="nofollow" title="Recent changes in pages linked from this page [k]" accesskey="k"><span>Related changes</span></a></li><li id="t-upload" class="mw-list-item"><a href="//en.wikipedia.org/wiki/Wikipedia:File_Upload_Wizard" title="Upload files [u]" accesskey="u"><span>Upload file</span></a></li><li id="t-permalink" class="mw-list-item"><a href="/w/index.php?title=Immediately_dangerous_to_life_or_health&oldid=1271712210" title="Permanent link to this revision of this page"><span>Permanent link</span></a></li><li id="t-info" class="mw-list-item"><a href="/w/index.php?title=Immediately_dangerous_to_life_or_health&action=info" title="More information about this page"><span>Page information</span></a></li><li id="t-cite" class="mw-list-item"><a href="/w/index.php?title=Special:CiteThisPage&page=Immediately_dangerous_to_life_or_health&id=1271712210&wpFormIdentifier=titleform" title="Information on how to cite this page"><span>Cite this page</span></a></li><li id="t-urlshortener" class="mw-list-item"><a href="/w/index.php?title=Special:UrlShortener&url=https%3A%2F%2Fen.wikipedia.org%2Fwiki%2FImmediately_dangerous_to_life_or_health"><span>Get shortened URL</span></a></li><li id="t-urlshortener-qrcode" class="mw-list-item"><a href="/w/index.php?title=Special:QrCode&url=https%3A%2F%2Fen.wikipedia.org%2Fwiki%2FImmediately_dangerous_to_life_or_health"><span>Download QR code</span></a></li> </ul> </div> </div> <div id="p-coll-print_export" class="vector-menu mw-portlet mw-portlet-coll-print_export" > <div class="vector-menu-heading"> Print/export </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="coll-download-as-rl" class="mw-list-item"><a href="/w/index.php?title=Special:DownloadAsPdf&page=Immediately_dangerous_to_life_or_health&action=show-download-screen" title="Download this page as a PDF file"><span>Download as PDF</span></a></li><li id="t-print" class="mw-list-item"><a href="/w/index.php?title=Immediately_dangerous_to_life_or_health&printable=yes" title="Printable version of this page [p]" accesskey="p"><span>Printable version</span></a></li> </ul> </div> </div> <div id="p-wikibase-otherprojects" class="vector-menu mw-portlet mw-portlet-wikibase-otherprojects" > <div class="vector-menu-heading"> In other projects </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="t-wikibase" class="wb-otherproject-link wb-otherproject-wikibase-dataitem mw-list-item"><a href="https://www.wikidata.org/wiki/Special:EntityPage/Q682341" title="Structured data on this page hosted by Wikidata [g]" accesskey="g"><span>Wikidata item</span></a></li> </ul> </div> </div> </div> </div> </div> </div> </nav> </div> </div> </div> <div class="vector-column-end"> <div class="vector-sticky-pinned-container"> <nav class="vector-page-tools-landmark" aria-label="Page tools"> <div id="vector-page-tools-pinned-container" class="vector-pinned-container"> </div> </nav> <nav class="vector-appearance-landmark" aria-label="Appearance"> <div id="vector-appearance-pinned-container" class="vector-pinned-container"> <div id="vector-appearance" class="vector-appearance vector-pinnable-element"> <div class="vector-pinnable-header vector-appearance-pinnable-header vector-pinnable-header-pinned" data-feature-name="appearance-pinned" data-pinnable-element-id="vector-appearance" data-pinned-container-id="vector-appearance-pinned-container" data-unpinned-container-id="vector-appearance-unpinned-container" > <div class="vector-pinnable-header-label">Appearance</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-appearance.pin">move to sidebar</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-appearance.unpin">hide</button> </div> </div> </div> </nav> </div> </div> <div id="bodyContent" class="vector-body" aria-labelledby="firstHeading" data-mw-ve-target-container> <div class="vector-body-before-content"> <div class="mw-indicators"> </div> <div id="siteSub" class="noprint">From Wikipedia, the free encyclopedia</div> </div> <div id="contentSub"><div id="mw-content-subtitle"><span class="mw-redirectedfrom">(Redirected from <a href="/w/index.php?title=IDLH&redirect=no" class="mw-redirect" title="IDLH">IDLH</a>)</span></div></div> <div id="mw-content-text" class="mw-body-content"><div class="mw-content-ltr mw-parser-output" lang="en" dir="ltr"><div class="shortdescription nomobile noexcerpt noprint searchaux" style="display:none">Exposure to dangerous levels of airborne contaminants</div> <figure typeof="mw:File/Thumb"><a href="/wiki/File:%D0%9A%D0%BE%D0%BC%D0%B1%D0%B8%D0%BD%D0%B8%D1%80%D0%BE%D0%B2%D0%B0%D0%BD%D0%BD%D1%8B%D0%B9_%D0%A1%D0%98%D0%97%D0%9E%D0%94_%D0%A8%D0%A0_%D0%B8_%D0%90%D0%94%D0%90.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/1/15/%D0%9A%D0%BE%D0%BC%D0%B1%D0%B8%D0%BD%D0%B8%D1%80%D0%BE%D0%B2%D0%B0%D0%BD%D0%BD%D1%8B%D0%B9_%D0%A1%D0%98%D0%97%D0%9E%D0%94_%D0%A8%D0%A0_%D0%B8_%D0%90%D0%94%D0%90.jpg/250px-%D0%9A%D0%BE%D0%BC%D0%B1%D0%B8%D0%BD%D0%B8%D1%80%D0%BE%D0%B2%D0%B0%D0%BD%D0%BD%D1%8B%D0%B9_%D0%A1%D0%98%D0%97%D0%9E%D0%94_%D0%A8%D0%A0_%D0%B8_%D0%90%D0%94%D0%90.jpg" decoding="async" width="200" height="384" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/1/15/%D0%9A%D0%BE%D0%BC%D0%B1%D0%B8%D0%BD%D0%B8%D1%80%D0%BE%D0%B2%D0%B0%D0%BD%D0%BD%D1%8B%D0%B9_%D0%A1%D0%98%D0%97%D0%9E%D0%94_%D0%A8%D0%A0_%D0%B8_%D0%90%D0%94%D0%90.jpg/330px-%D0%9A%D0%BE%D0%BC%D0%B1%D0%B8%D0%BD%D0%B8%D1%80%D0%BE%D0%B2%D0%B0%D0%BD%D0%BD%D1%8B%D0%B9_%D0%A1%D0%98%D0%97%D0%9E%D0%94_%D0%A8%D0%A0_%D0%B8_%D0%90%D0%94%D0%90.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/1/15/%D0%9A%D0%BE%D0%BC%D0%B1%D0%B8%D0%BD%D0%B8%D1%80%D0%BE%D0%B2%D0%B0%D0%BD%D0%BD%D1%8B%D0%B9_%D0%A1%D0%98%D0%97%D0%9E%D0%94_%D0%A8%D0%A0_%D0%B8_%D0%90%D0%94%D0%90.jpg/500px-%D0%9A%D0%BE%D0%BC%D0%B1%D0%B8%D0%BD%D0%B8%D1%80%D0%BE%D0%B2%D0%B0%D0%BD%D0%BD%D1%8B%D0%B9_%D0%A1%D0%98%D0%97%D0%9E%D0%94_%D0%A8%D0%A0_%D0%B8_%D0%90%D0%94%D0%90.jpg 2x" data-file-width="985" data-file-height="1893" /></a><figcaption>Personal protective equipment for IDLH conditions: pressure-demand supplied-air respirator equipped with a full facepiece in combination with an auxiliary pressure-demand self-contained breathing apparatus</figcaption></figure> <p>The term <b>immediately dangerous to life or health</b> (<b>IDLH</b>) is defined by the US <a href="/wiki/National_Institute_for_Occupational_Safety_and_Health" title="National Institute for Occupational Safety and Health">National Institute for Occupational Safety and Health</a> (NIOSH) as exposure to airborne contaminants that is "likely to cause death or immediate or delayed permanent adverse health effects or prevent escape from such an environment." Examples include smoke or other poisonous gases at sufficiently high concentrations. It is calculated using the <a href="/wiki/Median_lethal_dose" title="Median lethal dose">LD50 or LC50</a>.<sup id="cite_ref-:0_1-0" class="reference"><a href="#cite_note-:0-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> The <a href="/wiki/Occupational_Safety_and_Health_Administration" title="Occupational Safety and Health Administration">Occupational Safety and Health Administration</a> (OSHA) regulation (1910.134(b)) defines the term as "an atmosphere that poses an immediate threat to life, would cause irreversible adverse health effects, or would impair an individual's ability to escape from a dangerous atmosphere."<sup id="cite_ref-2" class="reference"><a href="#cite_note-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> </p><p>IDLH values are often used to guide the selection of breathing apparatus that are made available to workers or firefighters in specific situations.<sup id="cite_ref-:0_1-1" class="reference"><a href="#cite_note-:0-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> </p><p>The NIOSH definition does not include <a href="/wiki/Hypoxia_(medical)" class="mw-redirect" title="Hypoxia (medical)">oxygen deficiency</a> (below 19.5%) although atmosphere-supplying breathing apparatus is also required.<sup id="cite_ref-:1_3-0" class="reference"><a href="#cite_note-:1-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> Examples include high altitudes and unventilated, <a href="/wiki/Confined_space" title="Confined space">confined spaces</a>. </p><p>The OSHA definition is arguably broad enough to include oxygen-deficient circumstances in the absence of "airborne contaminants", as well as many other chemical, thermal, or pneumatic hazards to life or health (e.g., pure helium, super-cooled or super-heated air, hyperbaric or hypo-baric or submerged chambers, etc.). It also uses the broader term "impair", rather than "prevent", with respect to the ability to escape. For example, blinding but non-toxic smoke could be considered IDLH under the OSHA definition if it would impair the ability to escape a "dangerous" but not life-threatening atmosphere (such as tear gas). </p><p>The OSHA definition is part of a legal standard, which is the minimum legal requirement. Users or employers are encouraged to apply proper judgment to avoid taking unnecessary risks, even if the only immediate hazard is "reversible", such as temporary pain, disorientation, nausea, or non-toxic contamination. </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="NIOSH_respirator_selection_logic">NIOSH respirator selection logic</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Immediately_dangerous_to_life_or_health&action=edit&section=1" title="Edit section: NIOSH respirator selection logic"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure typeof="mw:File/Thumb"><a href="/wiki/File:TFS_SCBA_gear.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/0/02/TFS_SCBA_gear.jpg/200px-TFS_SCBA_gear.jpg" decoding="async" width="200" height="205" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/0/02/TFS_SCBA_gear.jpg/300px-TFS_SCBA_gear.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/0/02/TFS_SCBA_gear.jpg/400px-TFS_SCBA_gear.jpg 2x" data-file-width="1946" data-file-height="1995" /></a><figcaption>Personal protective equipment for IDLH conditions: pressure-demand self-contained breathing apparatus with a full facepiece</figcaption></figure> <p>If the concentration of harmful substances is IDLH, the worker must use the most reliable respirators. Such respirators should not use cartridges or canister with the sorbent, as their lifetime is too <a href="/wiki/Cartridges_and_canisters_of_air-purifying_respirators" class="mw-redirect" title="Cartridges and canisters of air-purifying respirators">poorly predicted</a>. In addition, the respirator must maintain positive pressure under the mask during inspiration, as this will prevent the leakage of unfiltered air through the gaps (which occur between the edges of the mask and the face sometimes). </p><p>Textbook NIOSH<sup id="cite_ref-Учебник-по-выбору-2004_4-0" class="reference"><a href="#cite_note-Учебник-по-выбору-2004-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup> recommended for use in IDLH conditions only <a href="/wiki/Self-contained_breathing_apparatus" title="Self-contained breathing apparatus">pressure-demand self-contained breathing apparatus</a> with a <a href="/wiki/Full_facepiece" class="mw-redirect" title="Full facepiece">full facepiece</a>, or pressure-demand supplied-air respirator equipped with a full facepiece in combination with an auxiliary pressure-demand self-contained breathing apparatus. </p> <div class="mw-heading mw-heading2"><h2 id="IDLH_values">IDLH values</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Immediately_dangerous_to_life_or_health&action=edit&section=2" title="Edit section: IDLH values"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The following examples are listed in reference to IDLH values.<sup id="cite_ref-:1_3-1" class="reference"><a href="#cite_note-:1-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> </p><p>Legend:<sup id="cite_ref-5" class="reference"><a href="#cite_note-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> </p> <dl><dt>Ca</dt> <dd>NIOSH considers this substance to be a potential occupational carcinogen. Revised values may follow in parentheses.</dd> <dt>N.D.</dt> <dd>Not determined. That is, the level is unknown, not non-existent.</dd> <dt>10%LEL</dt> <dd>The IDLH value has been set at 10% of the <a href="/wiki/Lower_explosive_limit" class="mw-redirect" title="Lower explosive limit">lower explosive limit</a> although other irreversible health effects or impairment of escape due to toxicology exist only at higher levels.</dd></dl> <table class="wikitable collapsible collapsed sortable" style="text-align:center"> <tbody><tr> <th colspan="7">IDLH values for gases and vapors, used in industry </th></tr> <tr> <th colspan="2">Number</th> <th rowspan="2">Substance</th> <th colspan="2">IDLH value</th> <th rowspan="2">Source </th></tr> <tr> <th><a href="/wiki/CAS_Registry_Number" title="CAS Registry Number">CAS</a></th> <th><a href="/wiki/International_Chemical_Safety_Cards" title="International Chemical Safety Cards">ICSC</a></th> <th>mg/m<sup>3</sup></th> <th>ppm </th></tr> <tr> <td>75-07-0</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0009.html">0009</a></td> <td><a href="/wiki/Acetaldehyde" title="Acetaldehyde">Acetaldehyde</a></td> <td>3600 mg/m<sup>3</sup></td> <td>2000 ppm</td> <td><a rel="nofollow" class="external text" href="http://www.aresok.org/npg/nioshdbs/idlh/75070.html">75070</a> <a rel="nofollow" class="external text" href="https://web.archive.org/web/20151002061954/http://www.aresok.org/npg/nioshdbs/idlh/75070.html">Archived</a> 2015-10-02 at the <a href="/wiki/Wayback_Machine" title="Wayback Machine">Wayback Machine</a> </td></tr> <tr> <td>64-19-7</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0363.html">0363</a></td> <td><a href="/wiki/Acetic_acid" title="Acetic acid">Acetic acid</a></td> <td>123 mg/m<sup>3</sup></td> <td>50 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/64197.html">64197</a> </td></tr> <tr> <td>108-24-7</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0209.html">0209</a></td> <td><a href="/wiki/Acetic_anhydride" title="Acetic anhydride">Acetic anhydride</a></td> <td>836 mg/m<sup>3</sup></td> <td>200 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/108247.html">108247</a> </td></tr> <tr> <td>67-64-1</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0087.html">0087</a></td> <td><a href="/wiki/Acetone" title="Acetone">Acetone</a></td> <td>5900 mg/m<sup>3</sup></td> <td>2500 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/67641.html">67641</a> (10% Lower explosive limit LEL) </td></tr> <tr> <td>75-05-8</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0088.html">0088</a></td> <td><a href="/wiki/Acetonitrile" title="Acetonitrile">Acetonitrile</a></td> <td>840 mg/m<sup>3</sup></td> <td>500 ppm</td> <td><a rel="nofollow" class="external text" href="http://www.aresok.org/npg/nioshdbs/idlh/75058.html">75058</a> <a rel="nofollow" class="external text" href="https://web.archive.org/web/20151002044815/http://www.aresok.org/npg/nioshdbs/idlh/75058.html">Archived</a> 2015-10-02 at the <a href="/wiki/Wayback_Machine" title="Wayback Machine">Wayback Machine</a> </td></tr> <tr> <td>79-27-6</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng1235.html">1235</a></td> <td><a href="/wiki/Acetylene_tetrabromide" class="mw-redirect" title="Acetylene tetrabromide">Acetylene tetrabromide</a></td> <td>113.1 mg/m<sup>3</sup></td> <td>8 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/79276.html">79276</a> </td></tr> <tr> <td>107-02-8</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0090.html">0090</a></td> <td><a href="/wiki/Acrolein" title="Acrolein">Acrolein</a></td> <td>4.58 mg/m<sup>3</sup></td> <td>2 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/107028.html">107028</a> </td></tr> <tr> <td>79-06-1</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0091.html">0091</a></td> <td><a href="/wiki/Acrylamide" title="Acrylamide">Acrylamide</a></td> <td>60 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/79061.html">79061</a>, carcinogenic substance </td></tr> <tr> <td>107-13-1</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0092.html">0092</a></td> <td><a href="/wiki/Acrylonitrile" title="Acrylonitrile">Acrylonitrile</a></td> <td>184.45 mg/m<sup>3</sup></td> <td>85 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/107131.html">107131</a> </td></tr> <tr> <td>309-00-2</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0774.html">0774</a></td> <td><a href="/wiki/Aldrin" title="Aldrin">Aldrin</a></td> <td>25 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/309002.html">309002</a>, carcinogenic substance </td></tr> <tr> <td>107-18-6</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0095.html">0095</a></td> <td><a href="/wiki/Allyl_alcohol" title="Allyl alcohol">Allyl alcohol</a></td> <td>47.6 mg/m<sup>3</sup></td> <td>20 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/107186.html">107186</a> </td></tr> <tr> <td>107-05-1</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0010.html">0010</a></td> <td><a href="/wiki/Allyl_chloride" title="Allyl chloride">Allyl chloride</a></td> <td>782.5 mg/m<sup>3</sup></td> <td>250 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/107051.html">107051</a> </td></tr> <tr> <td>106-92-3</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0096.html">0096</a></td> <td><a href="/wiki/Allyl_glycidyl_ether" title="Allyl glycidyl ether">Allyl glycidyl ether</a></td> <td>233.5 mg/m<sup>3</sup></td> <td>50 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/106923.html">106923</a> </td></tr> <tr> <td>504-29-0</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0214.html">0214</a></td> <td><a href="/wiki/2-Aminopyridine" title="2-Aminopyridine">2-Aminopyridine</a></td> <td>19.25 mg/m<sup>3</sup></td> <td>5 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/504290.html">504290</a> </td></tr> <tr> <td>7664-41-7</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0414.html">0414</a></td> <td><a href="/wiki/Ammonia" title="Ammonia">Ammonia</a></td> <td>210 mg/m<sup>3</sup></td> <td>300 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/7664417.html">7664417</a> </td></tr> <tr> <td>7773-06-0</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng1555.html">1555</a></td> <td><a href="/wiki/Ammonium_sulfamate" title="Ammonium sulfamate">Ammonium sulfamate</a></td> <td>1500 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/7773060.html">7773060</a> </td></tr> <tr> <td>628-63-7</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0218.html">0218</a></td> <td><a href="/wiki/N-Amyl_acetate" class="mw-redirect" title="N-Amyl acetate">n-Amyl acetate</a></td> <td>5330 mg/m<sup>3</sup></td> <td>1000 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/628637.html">628637</a> </td></tr> <tr> <td>626-38-0</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0219.html">0219</a></td> <td><a href="/wiki/Sec-Amyl_acetate" title="Sec-Amyl acetate">sec-Amyl acetate</a></td> <td>5330 mg/m<sup>3</sup></td> <td>1000 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/626380.html">626380</a> </td></tr> <tr> <td>62-53-3</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0011.html">0011</a></td> <td><a href="/wiki/Aniline" title="Aniline">Aniline</a></td> <td>381 mg/m<sup>3</sup></td> <td>100 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/62533.html">62533</a>, carcinogenic substance </td></tr> <tr> <td>90-04-0</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0970.html">0970</a></td> <td><a href="/wiki/O-Anisidine" title="O-Anisidine">o-Anisidine</a></td> <td>50 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/90040.html">90040</a> </td></tr> <tr> <td>104-94-9</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0971.html">0971</a></td> <td><a href="/wiki/P-Anisidine" title="P-Anisidine">p-Anisidine</a></td> <td>50 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/104949.html">104949</a> </td></tr> <tr> <td>7440-36-0</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0775.html">0775</a></td> <td><a href="/wiki/Antimony" title="Antimony">Antimony</a></td> <td>50 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/7440360.html">7440360</a> </td></tr> <tr> <td>86-88-4</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0973.html">0973</a></td> <td><a href="/wiki/ANTU" class="mw-redirect" title="ANTU">ANTU</a></td> <td>100 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/86884.html">86884</a> </td></tr> <tr> <td>7440-38-2</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0013.html">0013</a></td> <td><a href="/wiki/Arsenic" title="Arsenic">Arsenic</a></td> <td>5 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/7440382.html">7440382</a> </td></tr> <tr> <td>7784-42-1</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0222.html">0222</a></td> <td><a href="/wiki/Arsine" title="Arsine">Arsine</a></td> <td>9.57 mg/m<sup>3</sup></td> <td>3 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/7784421.html">7784421</a>, carcinogenic substance </td></tr> <tr> <td>86-50-0</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0826.html">0826</a></td> <td><a href="/wiki/Azinphos-methyl" title="Azinphos-methyl">Azinphos-methyl</a></td> <td>10 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/86500.html">86500</a> </td></tr> <tr> <td>10361-37-2</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0614.html">0614</a></td> <td><a href="/wiki/Barium_chloride" title="Barium chloride">Barium chloride</a></td> <td>50 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="http://www.aresok.org/npg/nioshdbs/idlh/7440393.html">7440393</a> <a rel="nofollow" class="external text" href="https://web.archive.org/web/20151002021015/http://www.aresok.org/npg/nioshdbs/idlh/7440393.html">Archived</a> 2015-10-02 at the <a href="/wiki/Wayback_Machine" title="Wayback Machine">Wayback Machine</a> </td></tr> <tr> <td>10022-31-8</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng1480.html">1480</a></td> <td><a href="/wiki/Barium_nitrate" title="Barium nitrate">Barium nitrate</a></td> <td>50 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="http://www.aresok.org/npg/nioshdbs/idlh/7440393.html">7440393</a> <a rel="nofollow" class="external text" href="https://web.archive.org/web/20151002021015/http://www.aresok.org/npg/nioshdbs/idlh/7440393.html">Archived</a> 2015-10-02 at the <a href="/wiki/Wayback_Machine" title="Wayback Machine">Wayback Machine</a> </td></tr> <tr> <td>71-43-2</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0015.html">0015</a></td> <td><a href="/wiki/Benzene" title="Benzene">Benzene</a></td> <td>1595 mg/m<sup>3</sup></td> <td>500 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/71432.html">71432</a>, carcinogenic substance </td></tr> <tr> <td>94-36-0</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0225.html">0225</a></td> <td><a href="/wiki/Benzoyl_peroxide" title="Benzoyl peroxide">Benzoyl peroxide</a></td> <td>1500 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/94360.html">94360</a> </td></tr> <tr> <td>100-44-7</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0016.html">0016</a></td> <td><a href="/wiki/Benzyl_chloride" title="Benzyl chloride">Benzyl chloride</a></td> <td>51.8 mg/m<sup>3</sup></td> <td>10 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/100447.html">100447</a> </td></tr> <tr> <td>7440-41-7</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0226.html">0226</a></td> <td><a href="/wiki/Beryllium" title="Beryllium">Beryllium & beryllium compounds</a></td> <td>4 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/7440417.html">7440417</a> </td></tr> <tr> <td>1303-86-2</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0836.html">0836</a></td> <td><a href="/wiki/Boron_oxide" title="Boron oxide">Boron oxide</a></td> <td>2000 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/1303862.html">1303862</a> </td></tr> <tr> <td>7637-07-2</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0231.html">0231</a></td> <td><a href="/wiki/Boron_trifluoride" title="Boron trifluoride">Boron trifluoride</a></td> <td>69.3 mg/m<sup>3</sup></td> <td>25 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/7637072.html">7637072</a> </td></tr> <tr> <td>7726-95-6</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0107.html">0107</a></td> <td><a href="/wiki/Bromine" title="Bromine">Bromine</a></td> <td>19.6 mg/m<sup>3</sup></td> <td>3 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/7726956.html">7726956</a> </td></tr> <tr> <td>75-25-2</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0108.html">0108</a></td> <td><a href="/wiki/Bromoform" title="Bromoform">Bromoform</a></td> <td>8789 mg/m<sup>3</sup></td> <td>850 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/75252.html">75252</a> </td></tr> <tr> <td>106-99-0</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0017.html">0017</a></td> <td><a href="/wiki/1,3-Butadiene" class="mw-redirect" title="1,3-Butadiene">1,3-Butadiene</a></td> <td>4420 mg/m<sup>3</sup></td> <td>2000 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/106990.html">106990</a>, (10% Lower explosive limit LEL); carcinogenic substance </td></tr> <tr> <td>78-93-3</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0179.html">0179</a></td> <td><a href="/wiki/2-Butanone" class="mw-redirect" title="2-Butanone">2-Butanone</a></td> <td>8850 mg/m<sup>3</sup></td> <td>3000 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/78933.html">78933</a> </td></tr> <tr> <td>111-76-2</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0059.html">0059</a></td> <td><a href="/wiki/2-Butoxyethanol" title="2-Butoxyethanol">2-Butoxyethanol</a></td> <td>3381 mg/m<sup>3</sup></td> <td>700 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/111762.html">111762</a> </td></tr> <tr> <td>123-86-4</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0399.html">0399</a></td> <td><a href="/wiki/N-Butyl_acetate" class="mw-redirect" title="N-Butyl acetate">n-Butyl acetate</a></td> <td>8075 mg/m<sup>3</sup></td> <td>1700 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/123864.html">123864</a>, (10% Lower explosive limit LEL) </td></tr> <tr> <td>105-46-4</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0840.html">0840</a></td> <td><a href="/wiki/Sec-Butyl_acetate" title="Sec-Butyl acetate">sec-Butyl acetate</a></td> <td>8075 mg/m<sup>3</sup></td> <td>1700 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/105464.html">105464</a> (10% Lower explosive limit LEL) </td></tr> <tr> <td>540-88-5</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng1445.html">1445</a></td> <td><a href="/wiki/Tert-Butyl_acetate" title="Tert-Butyl acetate">tert-Butyl acetate</a></td> <td>7125 mg/m<sup>3</sup></td> <td>1500 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/540885.html">540885</a>, (10% Lower explosive limit LEL) </td></tr> <tr> <td>71-36-3</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0111.html">0111</a></td> <td><a href="/wiki/N-Butanol" class="mw-redirect" title="N-Butanol">n-Butyl alcohol</a></td> <td>4242 mg/m<sup>3</sup></td> <td>1400 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/71363.html">71363</a> </td></tr> <tr> <td>78-92-2</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0112.html">0112</a></td> <td><a href="/wiki/2-Butanol" title="2-Butanol">sec-Butyl alcohol</a></td> <td>6060 mg/m<sup>3</sup></td> <td>2000 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/78922.html">78922</a> </td></tr> <tr> <td>75-65-0</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0114.html">0114</a></td> <td><a href="/wiki/Tert-Butyl_alcohol" title="Tert-Butyl alcohol">tert-Butyl alcohol</a></td> <td>4848 mg/m<sup>3</sup></td> <td>1600 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/75650.html">75650</a> </td></tr> <tr> <td>109-73-9</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0374.html">0374</a></td> <td><a href="/wiki/N-Butylamine" title="N-Butylamine">n-Butylamine</a></td> <td>897 mg/m<sup>3</sup></td> <td>300 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/109739.html">109739</a> </td></tr> <tr> <td>1189-85-1</td> <td><a rel="nofollow" class="external text" href="https://web.archive.org/web/20171205093012/https://www.cdc.gov/niosh/ipcsneng/neng1533.html">1533</a></td> <td><a href="/wiki/Tert-Butyl_chromate" class="mw-redirect" title="Tert-Butyl chromate">tert-Butyl chromate</a></td> <td>15 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/1189851.html">1189851</a>, carcinogenic substance </td></tr> <tr> <td>2426-08-6</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0115.html">0115</a></td> <td><a href="/wiki/N-Butyl_glycidyl_ether" title="N-Butyl glycidyl ether">n-Butyl glycidyl ether</a></td> <td>1332.5 mg/m<sup>3</sup></td> <td>250 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/2426086.html">2426086</a> </td></tr> <tr> <td>109-79-5</td> <td><a rel="nofollow" class="external text" href="https://web.archive.org/web/20170930174754/https://www.cdc.gov/niosh/ipcsneng/neng0018.html">0018</a></td> <td><a href="/wiki/N-Butyl_mercaptan" class="mw-redirect" title="N-Butyl mercaptan">n-Butyl mercaptan</a></td> <td>1845 mg/m<sup>3</sup></td> <td>500 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/109795.html">109795</a> </td></tr> <tr> <td>98-51-1</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng1068.html">1068</a></td> <td><a href="/w/index.php?title=P-tert-Butyltoluene&action=edit&redlink=1" class="new" title="P-tert-Butyltoluene (page does not exist)">p-tert-Butyltoluene</a></td> <td>607 mg/m<sup>3</sup></td> <td>100 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/98511.html">98511</a> </td></tr> <tr> <td>7440-43-9</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0020.html">0020</a></td> <td><a href="/wiki/Cadmium" title="Cadmium">Cadmium dust</a></td> <td>9 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/7440439.html">7440439</a>, carcinogenic substance </td></tr> <tr> <td>1306-19-0</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0020.html">0020</a></td> <td><a href="/wiki/Cadmium_oxide" title="Cadmium oxide">Cadmium fume</a></td> <td>9 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/7440439.html">7440439</a>, carcinogenic substance </td></tr> <tr> <td>7778-44-1</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0765.html">0765</a></td> <td><a href="/wiki/Calcium_arsenate" title="Calcium arsenate">Calcium arsenate</a></td> <td>5 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/7778441.html">7778441</a>, carcinogenic substance </td></tr> <tr> <td>1305-78-8</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0409.html">0409</a></td> <td><a href="/wiki/Calcium_oxide" title="Calcium oxide">Calcium oxide</a></td> <td>25 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/1305788.html">1305788</a> </td></tr> <tr> <td>76-22-2</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng1021.html">1021</a></td> <td><a href="/wiki/Camphor" title="Camphor">Camphor</a></td> <td>200 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/76222.html">76222</a> </td></tr> <tr> <td>63-25-2</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0121.html">0121</a></td> <td><a href="/wiki/Carbaryl" title="Carbaryl">Carbaryl</a></td> <td>100 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/63252.html">63252</a> </td></tr> <tr> <td>1333-86-4</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0471.html">0471</a></td> <td><a href="/wiki/Carbon_black" title="Carbon black">Carbon black</a></td> <td>1750 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/1333864.html">1333864</a> </td></tr> <tr> <td>124-38-9</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0021.html">0021</a></td> <td><a href="/wiki/Carbon_dioxide" title="Carbon dioxide">Carbon dioxide</a></td> <td>72000 mg/m<sup>3</sup></td> <td>40000 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/124389.html">124389</a> </td></tr> <tr> <td>75-15-0</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0022.html">0022</a></td> <td><a href="/wiki/Carbon_disulfide" title="Carbon disulfide">Carbon disulfide</a></td> <td>1555 mg/m<sup>3</sup></td> <td>500 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/75150.html">75150</a> </td></tr> <tr> <td>630-08-0</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0023.html">0023</a></td> <td><a href="/wiki/Carbon_monoxide" title="Carbon monoxide">Carbon monoxide</a></td> <td>1380 mg/m<sup>3</sup></td> <td>1200 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/630080.html">630080</a> </td></tr> <tr> <td>56-23-5</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0024.html">0024</a></td> <td><a href="/wiki/Carbon_tetrachloride" title="Carbon tetrachloride">Carbon tetrachloride</a></td> <td>1258 mg/m<sup>3</sup></td> <td>200 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/56235.html">56235</a>, carcinogenic substance </td></tr> <tr> <td>57-74-9</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0740.html">0740</a></td> <td><a href="/wiki/Chlordane" title="Chlordane">Chlordane</a></td> <td>100 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/57749.html">57749</a>, carcinogenic substance </td></tr> <tr> <td>8001-35-2</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0843.html">0843</a></td> <td><a href="/wiki/Chlorinated_camphene" class="mw-redirect" title="Chlorinated camphene">Chlorinated camphene</a></td> <td>200 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/8001352.html">8001352</a>, carcinogenic substance </td></tr> <tr> <td>31242–93–0</td> <td>-</td> <td><a href="/w/index.php?title=Chlorinated_diphenyl_oxide&action=edit&redlink=1" class="new" title="Chlorinated diphenyl oxide (page does not exist)">Chlorinated diphenyl oxide</a></td> <td>5 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/31242930.html">31242930</a> </td></tr> <tr> <td>7782-50-5</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0126.html">0126</a></td> <td><a href="/wiki/Chlorine" title="Chlorine">Chlorine</a></td> <td>29 mg/m<sup>3</sup></td> <td>10 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/7782505.html">7782505</a> </td></tr> <tr> <td>10049-04-4</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0127.html">0127</a></td> <td><a href="/wiki/Chlorine_dioxide" title="Chlorine dioxide">Chlorine dioxide</a></td> <td>13.35 mg/m<sup>3</sup></td> <td>5 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/10049044.html">10049044</a> </td></tr> <tr> <td>7790-91-2</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0656.html">0656</a></td> <td><a href="/wiki/Chlorine_trifluoride" title="Chlorine trifluoride">Chlorine trifluoride</a></td> <td>75.6 mg/m<sup>3</sup></td> <td>20 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/7790912.html">7790912</a> </td></tr> <tr> <td>107-20-0</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0706.html">0706</a></td> <td><a href="/wiki/Chloroacetaldehyde" title="Chloroacetaldehyde">Chloroacetaldehyde</a></td> <td>144.5 mg/m<sup>3</sup></td> <td>45 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/107200.html">107200</a> </td></tr> <tr> <td>532-27-4</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0128.html">0128</a></td> <td><a href="/wiki/Phenacyl_chloride" title="Phenacyl chloride">α-Chloroacetophenone</a></td> <td>15 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/532274.html">532274</a> </td></tr> <tr> <td>108-90-7</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0642.html">0642</a></td> <td><a href="/wiki/Chlorobenzene" title="Chlorobenzene">Chlorobenzene</a></td> <td>4610 mg/m<sup>3</sup></td> <td>1000 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/108907.html">108907</a> </td></tr> <tr> <td>2698-41-1</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng1065.html">1065</a></td> <td><a href="/wiki/CS_gas" title="CS gas">o-Chlorobenzylidene malonitrile</a></td> <td>2 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/2698411.html">2698411</a> </td></tr> <tr> <td>74-97-5</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0392.html">0392</a></td> <td><a href="/wiki/Chlorobromomethane" class="mw-redirect" title="Chlorobromomethane">Chlorobromomethane</a></td> <td>10580 mg/m<sup>3</sup></td> <td>2000 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/74975.html">74975</a> </td></tr> <tr> <td>53469-21-9</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0175.html">0175</a></td> <td><a href="/w/index.php?title=Chlorodiphenyl&action=edit&redlink=1" class="new" title="Chlorodiphenyl (page does not exist)">Chlorodiphenyl (42% chlorine)</a></td> <td>5 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/53469219.html">53469219</a>, carcinogenic substance </td></tr> <tr> <td>11097-69-1</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0939.html">0939</a></td> <td><a href="/w/index.php?title=Chlorodiphenyl&action=edit&redlink=1" class="new" title="Chlorodiphenyl (page does not exist)">Chlorodiphenyl (54% chlorine)</a></td> <td>5 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/53469219.html">53469219</a>, carcinogenic substance </td></tr> <tr> <td>67-66-3</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0027.html">0027</a></td> <td><a href="/wiki/Chloroform" title="Chloroform">Chloroform</a></td> <td>2440 mg/m<sup>3</sup></td> <td>500 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/67663.html">67663</a>, carcinogenic substance </td></tr> <tr> <td>600-25-9</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng1423.html">1423</a></td> <td><a href="/w/index.php?title=1-Chloro-1-nitropropane&action=edit&redlink=1" class="new" title="1-Chloro-1-nitropropane (page does not exist)">1-Chloro-1-nitropropane</a></td> <td>5.06 mg/m<sup>3</sup></td> <td>100 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/600259.html">600259</a> </td></tr> <tr> <td>76-06-2</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0750.html">0750</a></td> <td><a href="/wiki/Chloropicrin" title="Chloropicrin">Chloropicrin</a></td> <td>13.44 mg/m<sup>3</sup></td> <td>2 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/76062.html">76062</a> </td></tr> <tr> <td>126-99-8</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0133.html">0133</a></td> <td><a href="/wiki/Chloroprene" title="Chloroprene">β-Chloroprene</a></td> <td>10.86 mg/m<sup>3</sup></td> <td>300 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/126998.html">126998</a>, carcinogenic substance </td></tr> <tr> <td>1333-82-0</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng1194.html">1194</a></td> <td><a href="/wiki/Chromium_trioxide" title="Chromium trioxide">Chromium trioxide</a></td> <td>15 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/1333820.html">1333820</a>, carcinogenic substance </td></tr> <tr> <td>-</td> <td>-</td> <td><a href="/wiki/Chromium#Chromium.28II.29" title="Chromium">Chromium(II)</a></td> <td>250 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/cr2m3.html">cr2m3</a> </td></tr> <tr> <td>-</td> <td>-</td> <td><a href="/wiki/Chromium#Chromium.28III.29" title="Chromium">Chromium(III)</a></td> <td>25 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/cr3m3.html">cr3m3</a> </td></tr> <tr> <td>7440-47-3</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0029.html">0029</a></td> <td><a href="/wiki/Chromium" title="Chromium">Chromium</a></td> <td>250 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/7440473.html">7440473</a> </td></tr> <tr> <td>65996-93-2</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng1415.html">1415</a></td> <td><a href="/wiki/Aromatic_hydrocarbon" class="mw-redirect" title="Aromatic hydrocarbon">Coal tar pitch volatiles</a></td> <td>80 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/65996932.html">65996932</a>, carcinogenic substance </td></tr> <tr> <td>7440-48-4</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0782.html">0782</a></td> <td><a href="/wiki/Cobalt" title="Cobalt">Cobalt</a></td> <td>20 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/7440484.html">7440484</a> </td></tr> <tr> <td>7440-50-8</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0240.html">0240</a></td> <td><a href="/wiki/Copper" title="Copper">Copper</a></td> <td>100 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/7440508.html">7440508</a> </td></tr> <tr> <td>-</td> <td>-</td> <td><a href="/wiki/Byssinosis" title="Byssinosis">Cotton dust (raw)</a></td> <td>100 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/cotdust.html">cotdust</a> </td></tr> <tr> <td>136-78-7</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng1142.html">1142</a></td> <td><a href="/w/index.php?title=Disul-sodium&action=edit&redlink=1" class="new" title="Disul-sodium (page does not exist)">Crag® herbicide</a></td> <td>500 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/136787.html">136787</a> </td></tr> <tr> <td>108-39-4</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0646.html">0646</a></td> <td><a href="/wiki/M-Cresol" title="M-Cresol">m-Cresol</a></td> <td>1107.5 mg/m<sup>3</sup></td> <td>250 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/cresol.html">cresol</a> </td></tr> <tr> <td>95-48-7</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0030.html">0030</a></td> <td><a href="/wiki/O-Cresol" title="O-Cresol">o-Cresol</a></td> <td>1107.5 mg/m<sup>3</sup></td> <td>250 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/cresol.html">cresol</a> </td></tr> <tr> <td>106-44-5</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0031.html">0031</a></td> <td><a href="/wiki/P-Cresol" title="P-Cresol">p-Cresol</a></td> <td>1107.5 mg/m<sup>3</sup></td> <td>250 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/cresol.html">cresol</a> </td></tr> <tr> <td>4170-30-3</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0241.html">0241</a></td> <td><a href="/wiki/Crotonaldehyde" title="Crotonaldehyde">Crotonaldehyde</a></td> <td>143.5 mg/m<sup>3</sup></td> <td>50 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/123739.html">123739</a> </td></tr> <tr> <td>98-82-8</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0170.html">0170</a></td> <td><a href="/wiki/Cumene" title="Cumene">Cumene</a></td> <td>4428 mg/m<sup>3</sup></td> <td>900 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/98828.html">98828</a> (10% Lower explosive limit LEL) </td></tr> <tr> <td>110-82-7</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0242.html">0242</a></td> <td><a href="/wiki/Cyclohexane" title="Cyclohexane">Cyclohexane</a></td> <td>4472 mg/m<sup>3</sup></td> <td>1300 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/110827.html">110827</a> </td></tr> <tr> <td>108-93-0</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0243.html">0243</a></td> <td><a href="/wiki/Cyclohexanol" title="Cyclohexanol">Cyclohexanol</a></td> <td>1640 mg/m<sup>3</sup></td> <td>400 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/108930.html">108930</a> </td></tr> <tr> <td>108-94-1</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0425.html">0425</a></td> <td><a href="/wiki/Cyclohexanone" title="Cyclohexanone">Cyclohexanone</a></td> <td>2814 mg/m<sup>3</sup></td> <td>700 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/108941.html">108941</a> </td></tr> <tr> <td>110-83-8</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng1054.html">1054</a></td> <td><a href="/wiki/Cyclohexene" title="Cyclohexene">Cyclohexene</a></td> <td>6720 mg/m<sup>3</sup></td> <td>2000 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/110838.html">110838</a> </td></tr> <tr> <td>542-92-7</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0857.html">0857</a></td> <td><a href="/wiki/Cyclopentadiene" title="Cyclopentadiene">Cyclopentadiene</a></td> <td>2025 mg/m<sup>3</sup></td> <td>750 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/542927.html">542927</a> (10% Lower explosive limit LEL) </td></tr> <tr> <td>13121-70-5</td> <td>-</td> <td><a href="/wiki/Cyhexatin" title="Cyhexatin">Cyhexatin</a></td> <td>80 mg/m<sup>3</sup> (25 mg/m<sup>3</sup> - for Sn)</td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/tin-org.html">tin-org</a> </td></tr> <tr> <td>94-75-7</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0033.html">0033</a></td> <td><a href="/wiki/2,4-D" class="mw-redirect" title="2,4-D">2,4-D</a></td> <td>100 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/94757.html">94757</a> </td></tr> <tr> <td>50-29-3</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0034.html">0034</a></td> <td><a href="/wiki/DDT" title="DDT">DDT</a></td> <td>500 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/50293.html">50293</a>, carcinogenic substance </td></tr> <tr> <td>17702-41-9</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0712.html">0712</a></td> <td><a href="/wiki/Decaborane" title="Decaborane">Decaborane</a></td> <td>15 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/17702419.html">17702419</a> </td></tr> <tr> <td>8065-48-3</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0861.html">0861</a></td> <td><a href="/wiki/Demeton" title="Demeton">Demeton</a></td> <td>10 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/8065483.html">8065483</a> </td></tr> <tr> <td>123-42-2</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0647.html">0647</a></td> <td><a href="/wiki/Diacetone_alcohol" title="Diacetone alcohol">Diacetone alcohol</a></td> <td>8550 mg/m<sup>3</sup></td> <td>1800 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/123422.html">123422</a> </td></tr> <tr> <td>334-88-3</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng1256.html">1256</a></td> <td><a href="/wiki/Diazomethane" title="Diazomethane">Diazomethane</a></td> <td>3.44 mg/m<sup>3</sup></td> <td>2 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/334883.html">334883</a> (10% Lower explosive limit LEL) </td></tr> <tr> <td>19287-45-7</td> <td><a rel="nofollow" class="external text" href="https://web.archive.org/web/20181007111455/https://www.cdc.gov/niosh/ipcsneng/neng0432.html">0432</a></td> <td><a href="/wiki/Diborane" title="Diborane">Diborane</a></td> <td>16.95 mg/m<sup>3</sup></td> <td>15 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/19287457.html">19287457</a> </td></tr> <tr> <td>107-66-4</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng1278.html">1278</a></td> <td><a href="/w/index.php?title=Dibutyl_phosphate&action=edit&redlink=1" class="new" title="Dibutyl phosphate (page does not exist)">Dibutyl phosphate</a></td> <td>258 mg/m<sup>3</sup></td> <td>30 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/107664.html">107664</a> </td></tr> <tr> <td>84-74-2</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0036.html">0036</a></td> <td><a href="/wiki/Dibutyl_phthalate" title="Dibutyl phthalate">Dibutyl phthalate</a></td> <td>4000 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/84742.html">84742</a> </td></tr> <tr> <td>95-50-1</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng1066.html">1066</a></td> <td><a href="/wiki/O-Dichlorobenzene" class="mw-redirect" title="O-Dichlorobenzene">o-Dichlorobenzene</a></td> <td>1202 mg/m<sup>3</sup></td> <td>200 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/95501.html">95501</a> </td></tr> <tr> <td>106-46-7</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0037.html">0037</a></td> <td><a href="/wiki/P-Dichlorobenzene" class="mw-redirect" title="P-Dichlorobenzene">p-Dichlorobenzene</a></td> <td>906 mg/m<sup>3</sup></td> <td>150 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/106467.html">106467</a>, carcinogenic substance </td></tr> <tr> <td>75-71-8</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0048.html">0048</a></td> <td><a href="/wiki/Dichlorodifluoromethane" title="Dichlorodifluoromethane">Dichlorodifluoromethane</a></td> <td>7425 mg/m<sup>3</sup></td> <td>15000 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/75718.html">75718</a> </td></tr> <tr> <td>118-52-5</td> <td>-</td> <td><a href="/w/index.php?title=1,3-Dichloro-5,5-dimethylhydantoin&action=edit&redlink=1" class="new" title="1,3-Dichloro-5,5-dimethylhydantoin (page does not exist)">1,3-Dichloro-5,5-dimethylhydantoin</a></td> <td>5 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/118525.html">118525</a> </td></tr> <tr> <td>75-34-3</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0249.html">0249</a></td> <td><a href="/wiki/1,1-Dichloroethane" title="1,1-Dichloroethane">1,1-Dichloroethane</a></td> <td>12150 mg/m<sup>3</sup></td> <td>3000 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/75343.html">75343</a> </td></tr> <tr> <td>540-59-0</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0436.html">0436</a></td> <td><a href="/wiki/1,2-Dichloroethene" class="mw-redirect" title="1,2-Dichloroethene">1,2-Dichloroethylene</a></td> <td>3970 mg/m<sup>3</sup></td> <td>1000 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/540590.html">540590</a> </td></tr> <tr> <td>111-44-4</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0417.html">0417</a></td> <td><a href="/wiki/Bis(chloroethyl)_ether" title="Bis(chloroethyl) ether">Dichloroethyl ether</a></td> <td>585 mg/m<sup>3</sup></td> <td>100 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/111444.html">111444</a>, carcinogenic substance </td></tr> <tr> <td>75-43-4</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng1106.html">1106</a></td> <td><a href="/wiki/Dichloromonofluoromethane" class="mw-redirect" title="Dichloromonofluoromethane">Dichloromonofluoromethane</a></td> <td>21050 mg/m<sup>3</sup></td> <td>5000 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/75434.html">75434</a> </td></tr> <tr> <td>594-72-9</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0434.html">0434</a></td> <td><a href="/w/index.php?title=Dichloronitroethane&action=edit&redlink=1" class="new" title="Dichloronitroethane (page does not exist)">Dichloronitroethane</a></td> <td>147.3 mg/m<sup>3</sup></td> <td>25 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/594729.html">594729</a> </td></tr> <tr> <td>76-14-2</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0649.html">0649</a></td> <td><a href="/wiki/Dichlorotetrafluoroethane" class="mw-redirect" title="Dichlorotetrafluoroethane">Dichlorotetrafluoroethane</a></td> <td>104850 mg/m<sup>3</sup></td> <td>15000 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/76142.html">76142</a> </td></tr> <tr> <td>62-73-7</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0872.html">0872</a></td> <td><a href="/wiki/Dichlorvos" title="Dichlorvos">Dichlorvos</a></td> <td>100 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/62737.html">62737</a> </td></tr> <tr> <td>60-57-1</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0787.html">0787</a></td> <td><a href="/wiki/Dieldrin" title="Dieldrin">Dieldrin</a></td> <td>50 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/60571.html">60571</a>, carcinogenic substance </td></tr> <tr> <td>109-89-7</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0444.html">0444</a></td> <td><a href="/wiki/Diethylamine" title="Diethylamine">Diethylamine</a></td> <td>5980 mg/m<sup>3</sup></td> <td>200 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/109897.html">109897</a> </td></tr> <tr> <td>100-37-8</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0257.html">0257</a></td> <td><a href="/wiki/2-Diethylaminoethanol" class="mw-redirect" title="2-Diethylaminoethanol">2-Diethylaminoethanol</a></td> <td>479 mg/m<sup>3</sup></td> <td>100 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/100378.html">100378</a> </td></tr> <tr> <td>75-61-6</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng1419.html">1419</a></td> <td><a href="/wiki/Difluorodibromomethane" class="mw-redirect" title="Difluorodibromomethane">Difluorodibromomethane</a></td> <td>17160 mg/m<sup>3</sup></td> <td>2000 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/75616.html">75616</a> </td></tr> <tr> <td>2238-07-5</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0145.html">0145</a></td> <td><a href="/wiki/Diglycidyl_ether" title="Diglycidyl ether">Diglycidyl ether</a></td> <td>53.3 mg/m<sup>3</sup></td> <td>10 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/2238075.html">2238075</a>, carcinogenic substance </td></tr> <tr> <td>108-83-8</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0713.html">0713</a></td> <td><a href="/w/index.php?title=Diisobutyl_ketone&action=edit&redlink=1" class="new" title="Diisobutyl ketone (page does not exist)">Diisobutyl ketone</a></td> <td>2910 mg/m<sup>3</sup></td> <td>500 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/108838.html">108838</a> </td></tr> <tr> <td>108-18-9</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0449.html">0449</a></td> <td><a href="/wiki/Diisopropylamine" title="Diisopropylamine">Diisopropylamine</a></td> <td>828 mg/m<sup>3</sup></td> <td>200 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/108189.html">108189</a> </td></tr> <tr> <td>127-19-5</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0259.html">0259</a></td> <td><a href="/wiki/Dimethylacetamide" title="Dimethylacetamide">Dimethyl acetamide</a></td> <td>1068 mg/m<sup>3</sup></td> <td>300 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/127195.html">127195</a> </td></tr> <tr> <td>124-40-3</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng1485.html">1485</a></td> <td><a href="/wiki/Dimethylamine" title="Dimethylamine">Dimethylamine</a></td> <td>925 mg/m<sup>3</sup></td> <td>500 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/124403.html">124403</a> </td></tr> <tr> <td>121-69-7</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0877.html">0877</a></td> <td><a href="/wiki/Dimethylaniline" title="Dimethylaniline">N,N-Dimethylaniline</a></td> <td>4.96 mg/m<sup>3</sup></td> <td>100 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/121697.html">121697</a> </td></tr> <tr> <td>300-76-5</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0925.html">0925</a></td> <td><a href="/wiki/Naled" title="Naled">Naled</a></td> <td>200 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/300765.html">300765</a> </td></tr> <tr> <td>68-12-2</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0457.html">0457</a></td> <td><a href="/wiki/Dimethylformamide" title="Dimethylformamide">Dimethylformamide</a></td> <td>1495 mg/m<sup>3</sup></td> <td>500 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/68122.html">68122</a> </td></tr> <tr> <td>57-14-7</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0147.html">0147</a></td> <td><a href="/wiki/Unsymmetrical_dimethylhydrazine" title="Unsymmetrical dimethylhydrazine">1,1-Dimethylhydrazine</a></td> <td>371.5 mg/m<sup>3</sup></td> <td>15 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/57147.html">57147</a>, carcinogenic substance </td></tr> <tr> <td>131-11-3</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0261.html">0261</a></td> <td><a href="/wiki/Dimethylphthalate" class="mw-redirect" title="Dimethylphthalate">Dimethylphthalate</a></td> <td>2000 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/131113.html">131113</a> </td></tr> <tr> <td>77-78-1</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0148.html">0148</a></td> <td><a href="/wiki/Dimethyl_sulfate" title="Dimethyl sulfate">Dimethyl sulfate</a></td> <td>36.1 mg/m<sup>3</sup></td> <td>7 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/77781.html">77781</a>, carcinogenic substance </td></tr> <tr> <td>99-65-0</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0691.html">0691</a></td> <td><a href="/wiki/Dinitrobenzene" title="Dinitrobenzene">m-Dinitrobenzene</a></td> <td>50 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/528290.html">528290</a> </td></tr> <tr> <td>528-29-0</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0460.html">0460</a></td> <td><a href="/wiki/Dinitrobenzene" title="Dinitrobenzene">o-Dinitrobenzene</a></td> <td>50 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/528290.html">528290</a> </td></tr> <tr> <td>100-25-4</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0692.html">0692</a></td> <td><a href="/wiki/Dinitrobenzene" title="Dinitrobenzene">p-Dinitrobenzene</a></td> <td>50 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/528290.html">528290</a> </td></tr> <tr> <td>534-52-1</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0462.html">0462</a></td> <td><a href="/wiki/Dinitro-o-cresol" class="mw-redirect" title="Dinitro-o-cresol">Dinitro-o-cresol</a></td> <td>5 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/534521.html">534521</a> </td></tr> <tr> <td>25321-14-6</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0465.html">0465</a></td> <td><a href="/wiki/Dinitrotoluene" title="Dinitrotoluene">Dinitrotoluene</a></td> <td>50 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/25321146.html">25321146</a>, carcinogenic substance </td></tr> <tr> <td>117-81-7</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0271.html">0271</a></td> <td><a href="/wiki/Di-sec_octyl_phthalate" class="mw-redirect" title="Di-sec octyl phthalate">Di-sec octyl phthalate</a></td> <td>5000 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/117817.html">117817</a>, carcinogenic substance </td></tr> <tr> <td>123-91-1</td> <td><a rel="nofollow" class="external text" href="https://web.archive.org/web/20050429004946/http://www.cdc.gov/niosh/ipcsneng/neng0041.html">0041</a></td> <td><a href="/wiki/Dioxane" class="mw-redirect" title="Dioxane">Dioxane</a></td> <td>1800 mg/m<sup>3</sup></td> <td>500 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/123911.html">123911</a>, carcinogenic substance </td></tr> <tr> <td>92-52-4</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0106.html">0106</a></td> <td><a href="/wiki/Diphenyl" class="mw-redirect" title="Diphenyl">Diphenyl</a></td> <td>100 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/92524.html">92524</a> </td></tr> <tr> <td>34590-94-8</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0884.html">0884</a></td> <td><a href="/w/index.php?title=Dipropylene_glycol_methyl_ether&action=edit&redlink=1" class="new" title="Dipropylene glycol methyl ether (page does not exist)">Dipropylene glycol methyl ether</a></td> <td>3636 mg/m<sup>3</sup></td> <td>600 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/34590948.html">34590948</a> </td></tr> <tr> <td>72-20-8</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng1023.html">1023</a></td> <td><a href="/wiki/Endrin" title="Endrin">Endrin</a></td> <td>2 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/72208.html">72208</a> </td></tr> <tr> <td>106-89-8</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0043.html">0043</a></td> <td><a href="/wiki/Epichlorohydrin" title="Epichlorohydrin">Epichlorohydrin</a></td> <td>283.5 mg/m<sup>3</sup></td> <td>75 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/106898.html">106898</a>, carcinogenic substance </td></tr> <tr> <td>2104-64-5</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0753.html">0753</a></td> <td><a href="/w/index.php?title=Phosphonothioic_acid,_phenyl-,_O-ethylO-(4-nitrophenyl)_ester&action=edit&redlink=1" class="new" title="Phosphonothioic acid, phenyl-, O-ethylO-(4-nitrophenyl) ester (page does not exist)">EPN</a></td> <td>5 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/2104645.html">2104645</a> </td></tr> <tr> <td>141-43-5</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0152.html">0152</a></td> <td><a href="/wiki/Ethanolamine" title="Ethanolamine">Ethanolamine</a></td> <td>75 mg/m<sup>3</sup></td> <td>30 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/141435.html">141435</a> </td></tr> <tr> <td>110-80-5</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0060.html">0060</a></td> <td><a href="/wiki/2-Ethoxyethanol" title="2-Ethoxyethanol">2-Ethoxyethanol</a></td> <td>1845 mg/m<sup>3</sup></td> <td>500 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/110805.html">110805</a> </td></tr> <tr> <td>111-15-9</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0364.html">0364</a></td> <td><a href="/wiki/2-Ethoxyethyl_acetate" title="2-Ethoxyethyl acetate">2-Ethoxyethyl acetate</a></td> <td>2705 mg/m<sup>3</sup></td> <td>500 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/111159.html">111159</a> </td></tr> <tr> <td>141-78-6</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0367.html">0367</a></td> <td><a href="/wiki/Ethyl_acetate" title="Ethyl acetate">Ethyl acetate</a></td> <td>7200 mg/m<sup>3</sup></td> <td>2000 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/141786.html">141786</a> (10% Lower explosive limit LEL) </td></tr> <tr> <td>140-88-5</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0267.html">0267</a></td> <td><a href="/wiki/Ethyl_acrylate" title="Ethyl acrylate">Ethyl acrylate</a></td> <td>1227 mg/m<sup>3</sup></td> <td>500 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/140885.html">140885</a>, carcinogenic substance </td></tr> <tr> <td>64-17-5</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0044.html">0044</a></td> <td><a href="/wiki/Ethyl_alcohol" class="mw-redirect" title="Ethyl alcohol">Ethyl alcohol</a></td> <td>6237 mg/m<sup>3</sup></td> <td>3300 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/64175.html">64175</a> (10% Lower explosive limit LEL) </td></tr> <tr> <td>75-04-7</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng1482.html">1482</a></td> <td><a href="/wiki/Ethylamine" title="Ethylamine">Ethylamine</a></td> <td>1110 mg/m<sup>3</sup></td> <td>600 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/75047.html">75047</a> </td></tr> <tr> <td>100-41-4</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0268.html">0268</a></td> <td><a href="/wiki/Ethyl_benzene" class="mw-redirect" title="Ethyl benzene">Ethyl benzene</a></td> <td>3472 mg/m<sup>3</sup></td> <td>800 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/100414.html">100414</a> (10% Lower explosive limit LEL) </td></tr> <tr> <td>74-96-4</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng1378.html">1378</a></td> <td><a href="/wiki/Ethyl_bromide" class="mw-redirect" title="Ethyl bromide">Ethyl bromide</a></td> <td>8920 mg/m<sup>3</sup></td> <td>2000 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/74964.html">74964</a> </td></tr> <tr> <td>106-35-4</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0889.html">0889</a></td> <td><a href="/wiki/Ethyl_butyl_ketone" class="mw-redirect" title="Ethyl butyl ketone">Ethyl butyl ketone</a></td> <td>4670 mg/m<sup>3</sup></td> <td>1000 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/106354.html">106354</a> </td></tr> <tr> <td>75-00-3</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0132.html">0132</a></td> <td><a href="/wiki/Ethyl_chloride" class="mw-redirect" title="Ethyl chloride">Ethyl chloride</a></td> <td>10032 mg/m<sup>3</sup></td> <td>3800 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/75003.html">75003</a> (10% Lower explosive limit LEL) </td></tr> <tr> <td>107-07-3</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0236.html">0236</a></td> <td><a href="/wiki/Ethylene_chlorohydrin" class="mw-redirect" title="Ethylene chlorohydrin">Ethylene chlorohydrin</a></td> <td>23 mg/m<sup>3</sup></td> <td>7 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/107073.html">107073</a> </td></tr> <tr> <td>107-15-3</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0269.html">0269</a></td> <td><a href="/wiki/Ethylenediamine" title="Ethylenediamine">Ethylenediamine</a></td> <td>2460 mg/m<sup>3</sup></td> <td>1000 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/107153.html">107153</a> </td></tr> <tr> <td>106-93-4</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0045.html">0045</a></td> <td><a href="/wiki/Ethylene_dibromide" class="mw-redirect" title="Ethylene dibromide">Ethylene dibromide</a></td> <td>769 mg/m<sup>3</sup></td> <td>100 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/106934.html">106934</a>, carcinogenic substance </td></tr> <tr> <td>107-06-2</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0250.html">0250</a></td> <td><a href="/wiki/Ethylene_dichloride" class="mw-redirect" title="Ethylene dichloride">Ethylene dichloride</a></td> <td>202.5 mg/m<sup>3</sup></td> <td>50 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/107062.html">107062</a>, carcinogenic substance </td></tr> <tr> <td>628-96-6</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng1056.html">1056</a></td> <td><a href="/wiki/Ethylene_glycol_dinitrate" title="Ethylene glycol dinitrate">Ethylene glycol dinitrate</a></td> <td>75 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/628966.html">628966</a> </td></tr> <tr> <td>151-56-4</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0100.html">0100</a></td> <td><a href="/wiki/Ethyleneimine" class="mw-redirect" title="Ethyleneimine">Ethyleneimine</a></td> <td>176 mg/m<sup>3</sup></td> <td>100 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/151564.html">151564</a>, carcinogenic substance </td></tr> <tr> <td>75-21-8</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0155.html">0155</a></td> <td><a href="/wiki/Ethylene_oxide" title="Ethylene oxide">Ethylene oxide</a></td> <td>1440 mg/m<sup>3</sup></td> <td>800 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/75218.html">html</a>, carcinogenic substance </td></tr> <tr> <td>60-29-7</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0355.html">0355</a></td> <td><a href="/wiki/Ethyl_ether" class="mw-redirect" title="Ethyl ether">Ethyl ether</a></td> <td>5757 mg/m<sup>3</sup></td> <td>1900 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/60297.html">60297</a> (10% Lower explosive limit LEL) </td></tr> <tr> <td>109-94-4</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0623.html">0623</a></td> <td><a href="/wiki/Ethyl_formate" title="Ethyl formate">Ethyl formate</a></td> <td>4545 mg/m<sup>3</sup></td> <td>1500 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/109944.html">109944</a> </td></tr> <tr> <td>75-08-1</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0470.html">0470</a></td> <td><a href="/wiki/Ethyl_mercaptan" class="mw-redirect" title="Ethyl mercaptan">Ethyl mercaptan</a></td> <td>1270 mg/m<sup>3</sup></td> <td>500 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/75081.html">75081</a> </td></tr> <tr> <td>100-74-3</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0480.html">0480</a></td> <td><a href="/w/index.php?title=N-Ethylmorpholine&action=edit&redlink=1" class="new" title="N-Ethylmorpholine (page does not exist)">N-Ethylmorpholine</a></td> <td>471 mg/m<sup>3</sup></td> <td>100 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/100743.html">100743</a> </td></tr> <tr> <td>78-10-4</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0333.html">0333</a></td> <td><a href="/wiki/Ethyl_silicate" class="mw-redirect" title="Ethyl silicate">Ethyl silicate</a></td> <td>5964 mg/m<sup>3</sup></td> <td>700 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/78104.html">78104</a> </td></tr> <tr> <td>14484-64-1</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0792.html">0792</a></td> <td><a href="/wiki/Ferbam" class="mw-redirect" title="Ferbam">Ferbam</a></td> <td>800 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/14484641.html">14484641</a> </td></tr> <tr> <td>12604-58-9</td> <td>-</td> <td><a href="/wiki/Ferrovanadium" title="Ferrovanadium">Ferrovanadium dust</a></td> <td>500 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/12604589.html">12604589</a> </td></tr> <tr> <td>7782-41-4</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0046.html">0046</a></td> <td><a href="/wiki/Fluorine" title="Fluorine">Fluorine</a></td> <td>38.8 mg/m<sup>3</sup></td> <td>25 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/7782414.html">7782414</a> </td></tr> <tr> <td>75-69-4</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0047.html">0047</a></td> <td><a href="/wiki/Trichlorofluoromethane" title="Trichlorofluoromethane">Fluorotrichloromethane</a></td> <td>11240 mg/m<sup>3</sup></td> <td>2000 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/75694.html">75694</a> </td></tr> <tr> <td>50-00-0</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0695.html">0695</a></td> <td><a href="/wiki/Formaldehyde" title="Formaldehyde">Formaldehyde</a></td> <td>24.6 mg/m<sup>3</sup></td> <td>20 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/50000.html">50000</a>, carcinogenic substance </td></tr> <tr> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0695.html">0695</a></td> <td><a href="/wiki/Formaldehyde" title="Formaldehyde">Formalin</a></td> <td>24.6 mg/m<sup>3</sup></td> <td>20 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/50000.html">50000</a>, carcinogenic substance </td></tr> <tr> <td>64-18-6</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0485.html">0485</a></td> <td><a href="/wiki/Formic_acid" title="Formic acid">Formic acid</a></td> <td>56.4 mg/m<sup>3</sup></td> <td>30 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/64186.html">64186</a> </td></tr> <tr> <td>98-01-1</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0276.html">0276</a></td> <td><a href="/wiki/Furfural" title="Furfural">Furfural</a></td> <td>393 mg/m<sup>3</sup></td> <td>100 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/98011.html">98011</a> </td></tr> <tr> <td>98-00-0</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0794.html">0794</a></td> <td><a href="/wiki/Furfuryl_alcohol" title="Furfuryl alcohol">Furfuryl alcohol</a></td> <td>300.8 mg/m<sup>3</sup></td> <td>75 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/98000.html">98000</a> </td></tr> <tr> <td>556-52-5</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0159.html">0159</a></td> <td><a href="/wiki/Glycidol" title="Glycidol">Glycidol</a></td> <td>454.5 mg/m<sup>3</sup></td> <td>150 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/556525.html">556525</a> </td></tr> <tr> <td>7782-42-5</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0893.html">0893</a></td> <td><a href="/wiki/Graphite" title="Graphite">Graphite (natural)</a></td> <td>1250 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/7782425.html">7782425</a> </td></tr> <tr> <td>7440-58-6</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0847.html">0847</a></td> <td><a href="/wiki/Hafnium" title="Hafnium">Hafnium</a></td> <td>50 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/7440586.html">7440586</a> </td></tr> <tr> <td>76-44-8</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0743.html">0743</a></td> <td><a href="/wiki/Heptachlor" title="Heptachlor">Heptachlor</a></td> <td>35 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/76448.html">76448</a>, carcinogenic substance </td></tr> <tr> <td>142-82-5</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0657.html">0657</a></td> <td><a href="/wiki/Heptane" title="Heptane">n-Heptane</a></td> <td>3075 mg/m<sup>3</sup></td> <td>750 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/142825.html">142825</a> </td></tr> <tr> <td>67-72-1</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0051.html">0051</a></td> <td><a href="/wiki/Hexachloroethane" title="Hexachloroethane">Hexachloroethane</a></td> <td>2904 mg/m<sup>3</sup></td> <td>300 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/67721.html">67721</a>, carcinogenic substance </td></tr> <tr> <td>1335-87-1</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0997.html">0997</a></td> <td><a href="/w/index.php?title=Hexachloronaphthalene&action=edit&redlink=1" class="new" title="Hexachloronaphthalene (page does not exist)">Hexachloronaphthalene</a></td> <td>2 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/1335871.html">1335871</a> </td></tr> <tr> <td>110-54-3</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0279.html">0279</a></td> <td><a href="/wiki/Hexane" title="Hexane">n-Hexane</a></td> <td>3883 mg/m<sup>3</sup></td> <td>1100 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/110543.html">110543</a> (10% Lower explosive limit LEL) </td></tr> <tr> <td>591-78-6</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0489.html">0489</a></td> <td><a href="/wiki/2-Hexanone" title="2-Hexanone">2-Hexanone</a></td> <td>6560 mg/m<sup>3</sup></td> <td>1600 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/591786.html">591786</a> </td></tr> <tr> <td>108-10-1</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0511.html">0511</a></td> <td><a href="/wiki/Methyl_isobutyl_ketone" title="Methyl isobutyl ketone">Hexone</a></td> <td>2050 mg/m<sup>3</sup></td> <td>500 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/108101.html">108101</a> </td></tr> <tr> <td>108-84-9</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng1335.html">1335</a></td> <td><a href="/w/index.php?title=Sec-Hexyl_acetate&action=edit&redlink=1" class="new" title="Sec-Hexyl acetate (page does not exist)">sec-Hexyl acetate</a></td> <td>2950 mg/m<sup>3</sup></td> <td>500 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/108849.html">108849</a> </td></tr> <tr> <td>302-01-2</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0281.html">0281</a></td> <td><a href="/wiki/Hydrazine" title="Hydrazine">Hydrazine</a></td> <td>65.5 mg/m<sup>3</sup></td> <td>50 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/302012.html">302012</a>, carcinogenic substance </td></tr> <tr> <td>10035-10-6</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0282.html">0282</a></td> <td><a href="/wiki/Hydrogen_bromide" title="Hydrogen bromide">Hydrogen bromide</a></td> <td>99.3 mg/m<sup>3</sup></td> <td>30 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/10035106.html">10035106</a> </td></tr> <tr> <td>7647-01-0</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0163.html">0163</a></td> <td><a href="/wiki/Hydrogen_chloride" title="Hydrogen chloride">Hydrogen chloride</a></td> <td>74.5 mg/m<sup>3</sup></td> <td>50 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/7647010.html">7647010</a> </td></tr> <tr> <td>74-90-8</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0492.html">0492</a></td> <td><a href="/wiki/Hydrogen_cyanide" title="Hydrogen cyanide">Hydrogen cyanide</a></td> <td>55 mg/m<sup>3</sup></td> <td>50 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/74908.html">74908</a> </td></tr> <tr> <td>7664-39-3</td> <td><a rel="nofollow" class="external text" href="https://web.archive.org/web/20171205143606/https://www.cdc.gov/niosh/ipcsneng/neng0283.html">0283</a></td> <td><a href="/wiki/Hydrogen_fluoride" title="Hydrogen fluoride">Hydrogen fluoride</a></td> <td>24.6 mg/m<sup>3</sup></td> <td>30 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/7664393.html">7664393</a> </td></tr> <tr> <td>7722-84-1</td> <td>-</td> <td><a href="/wiki/Hydrogen_peroxide" title="Hydrogen peroxide">Hydrogen peroxide</a></td> <td>104 mg/m<sup>3</sup></td> <td>75 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/772841.html">772841</a> </td></tr> <tr> <td>7783-07-5</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0284.html">0284</a></td> <td><a href="/wiki/Hydrogen_selenide" title="Hydrogen selenide">Hydrogen selenide</a></td> <td>3.3 mg/m<sup>3</sup></td> <td>1 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/7783075.html">7783075</a> </td></tr> <tr> <td>7783-06-4</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0165.html">0165</a></td> <td><a href="/wiki/Hydrogen_sulfide" title="Hydrogen sulfide">Hydrogen sulfide</a></td> <td>140 mg/m<sup>3</sup></td> <td>100 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/7783064.html">7783064</a> </td></tr> <tr> <td>123-31-9</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0166.html">0166</a></td> <td><a href="/wiki/Hydroquinone" title="Hydroquinone">Hydroquinone</a></td> <td>50 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/123319.html">123319</a> </td></tr> <tr> <td>7553-56-2</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0167.html">0167</a></td> <td><a href="/wiki/Iodine" title="Iodine">Iodine</a></td> <td>20.76 mg/m<sup>3</sup></td> <td>2 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/7553562.html">7553562</a> </td></tr> <tr> <td>1309-37-1</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng1577.html">1577</a></td> <td><a href="/wiki/Iron(III)_oxide" title="Iron(III) oxide">Iron(III) oxide</a></td> <td>2500 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/1309371.html">1309371</a> </td></tr> <tr> <td>123-92-2</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0356.html">0356</a></td> <td><a href="/wiki/Isoamyl_acetate" title="Isoamyl acetate">Isoamyl acetate</a></td> <td>5330 mg/m<sup>3</sup></td> <td>1000 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/123922.html">123922</a> </td></tr> <tr> <td>123-51-3</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0798.html">0798</a></td> <td><a href="/wiki/Isoamyl_alcohol" title="Isoamyl alcohol">Isoamyl alcohol (primary)</a></td> <td>1805 mg/m<sup>3</sup></td> <td>500 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/123513.html">123513</a> </td></tr> <tr> <td>6032-29-7</td> <td>-</td> <td><a href="/wiki/Isoamyl_alcohol" title="Isoamyl alcohol">Isoamyl alcohol (secondary)</a></td> <td>1805 mg/m<sup>3</sup></td> <td>500 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/123513.html">123513</a> </td></tr> <tr> <td>110-19-0</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0494.html">0494</a></td> <td><a href="/wiki/Isobutyl_acetate" title="Isobutyl acetate">Isobutyl acetate</a></td> <td>6175 mg/m<sup>3</sup></td> <td>1300 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/110190.html">110190</a> (10% Lower explosive limit LEL) </td></tr> <tr> <td>78-83-1</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0113.html">0113</a></td> <td><a href="/wiki/Isobutyl_alcohol" class="mw-redirect" title="Isobutyl alcohol">Isobutyl alcohol</a></td> <td>4848 mg/m<sup>3</sup></td> <td>1600 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/78831.html">78831</a> </td></tr> <tr> <td>78-59-1</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0169.html">0169</a></td> <td><a href="/wiki/Isophorone" title="Isophorone">Isophorone</a></td> <td>1130 mg/m<sup>3</sup></td> <td>200 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/78591.html">78591</a> </td></tr> <tr> <td>108-21-4</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0907.html">0907</a></td> <td><a href="/wiki/Isopropyl_acetate" title="Isopropyl acetate">Isopropyl acetate</a></td> <td>7524 mg/m<sup>3</sup></td> <td>1800 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/108214.html">108214</a> </td></tr> <tr> <td>67-63-0</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0554.html">0554</a></td> <td><a href="/wiki/Isopropyl_alcohol" title="Isopropyl alcohol">Isopropyl alcohol</a></td> <td>4920 mg/m<sup>3</sup></td> <td>2000 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/67630.html">67630</a> (10% Lower explosive limit LEL) </td></tr> <tr> <td>75-31-0</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0908.html">0908</a></td> <td><a href="/wiki/Isopropylamine" title="Isopropylamine">Isopropylamine</a></td> <td>1815 mg/m<sup>3</sup></td> <td>750 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/75310.html">75310</a> </td></tr> <tr> <td>108-20-3</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0906.html">0906</a></td> <td><a href="/wiki/Diisopropyl_ether" title="Diisopropyl ether">Isopropyl ether</a></td> <td>5852 mg/m<sup>3</sup></td> <td>1400 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/108203.html">108203</a> (10% Lower explosive limit LEL) </td></tr> <tr> <td>4016-14-2</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0171.html">0171</a></td> <td><a href="/w/index.php?title=Isopropyl_glycidyl_ether&action=edit&redlink=1" class="new" title="Isopropyl glycidyl ether (page does not exist)">Isopropyl glycidyl ether</a></td> <td>1900 mg/m<sup>3</sup></td> <td>400 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/4016142.html">4016142</a> </td></tr> <tr> <td>463-51-4</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0812.html">0812</a></td> <td><a href="/wiki/Ketene" title="Ketene">Ketene</a></td> <td>8.6 mg/m<sup>3</sup></td> <td>5 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/463514.html">463514</a> </td></tr> <tr> <td>7439-92-1</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0052.html">0052</a></td> <td><a href="/wiki/Lead" title="Lead">Lead</a></td> <td>100 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/7439921.html">7439921</a> </td></tr> <tr> <td>58-89-9</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0053.html">0053</a></td> <td><a href="/wiki/Lindane" title="Lindane">Lindane</a></td> <td>50 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/58899.html">58899</a> </td></tr> <tr> <td>7580-67-8</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0813.html">0813</a></td> <td><a href="/wiki/Lithium_hydride" title="Lithium hydride">Lithium hydride</a></td> <td>0.5 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/7580678.html">7580678</a> </td></tr> <tr> <td>68476-85-7</td> <td>-</td> <td><a href="/wiki/Liquefied_natural_gas" title="Liquefied natural gas">L.P.G.</a></td> <td>3440–4740 mg/m<sup>3</sup></td> <td>2000 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/68476857.html">68476857</a> (10% Lower explosive limit LEL) </td></tr> <tr> <td>1309-48-4</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0504.html">0504</a></td> <td><a href="/wiki/Magnesium_oxide" title="Magnesium oxide">Magnesium oxide fume</a></td> <td>750 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/1309484.html">1309484</a> </td></tr> <tr> <td>121-75-5</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0172.html">0172</a></td> <td><a href="/wiki/Malathion" title="Malathion">Malathion</a></td> <td>250 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/121755.html">121755</a> </td></tr> <tr> <td>108-31-6</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0799.html">0799</a></td> <td><a href="/wiki/Maleic_anhydride" title="Maleic anhydride">Maleic anhydride</a></td> <td>10 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/108316.html">108316</a> </td></tr> <tr> <td>7439-96-5</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0174.html">0174</a></td> <td><a href="/wiki/Manganese" title="Manganese">Manganese</a></td> <td>500 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/7439965.html">7439965</a> </td></tr> <tr> <td>7439-97-6</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0056.html">0056</a></td> <td><a href="/wiki/Mercury_(element)" title="Mercury (element)">Mercury</a></td> <td>10 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/7439976.html">7439976</a> </td></tr> <tr> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng1304.html">1304</a></td> <td><a href="/wiki/Organomercury" class="mw-redirect" title="Organomercury">Mercury (organo) alkyl compounds</a></td> <td>2 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/merc-hg.html">merc-hg</a> </td></tr> <tr> <td>141-79-7</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0814.html">0814</a></td> <td><a href="/wiki/Mesityl_oxide" title="Mesityl oxide">Mesityl oxide</a></td> <td>5628 mg/m<sup>3</sup></td> <td>1400 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/141797.html">141797</a> (10% Lower explosive limit LEL) </td></tr> <tr> <td>72-43-5</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng1306.html">1306</a></td> <td><a href="/wiki/Methoxychlor" title="Methoxychlor">Methoxychlor</a></td> <td>5000 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/72435.html">72435</a>, carcinogenic substance </td></tr> <tr> <td>79-20-9</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0507.html">0507</a></td> <td><a href="/wiki/Methyl_acetate" title="Methyl acetate">Methyl acetate</a></td> <td>9393 mg/m<sup>3</sup></td> <td>3100 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/79209.html">79209</a> (10% Lower explosive limit LEL) </td></tr> <tr> <td>74-99-7</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0560.html">0560</a></td> <td><a href="/wiki/Methyl_acetylene" class="mw-redirect" title="Methyl acetylene">Methyl acetylene</a></td> <td>2788 mg/m<sup>3</sup></td> <td>1700 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/74997.html">74997</a> (10% Lower explosive limit LEL) </td></tr> <tr> <td>59355-75-8</td> <td>-</td> <td><a href="/wiki/Methyl_acetylene" class="mw-redirect" title="Methyl acetylene">Methyl acetylene-propadiene mixture</a></td> <td>5576 mg/m<sup>3</sup></td> <td>3400 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/59355758.html">59355758</a> (10% Lower explosive limit LEL) </td></tr> <tr> <td>96-33-3</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0625.html">0625</a></td> <td><a href="/wiki/Methyl_acrylate" title="Methyl acrylate">Methyl acrylate</a></td> <td>880 mg/m<sup>3</sup></td> <td>250 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/96333.html">96333</a> </td></tr> <tr> <td>109-87-5</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng1152.html">1152</a></td> <td><a href="/wiki/Dimethoxymethane" title="Dimethoxymethane">Methylal</a></td> <td>6842 mg/m<sup>3</sup></td> <td>2200 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/109875.html">109875</a> (10% Lower explosive limit LEL) </td></tr> <tr> <td>67-56-1</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0057.html">0057</a></td> <td><a href="/wiki/Methanol" title="Methanol">Methyl alcohol</a></td> <td>7860 mg/m<sup>3</sup></td> <td>6000 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/67561.html">67561</a> </td></tr> <tr> <td>74-89-5</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng1483.html">1483</a></td> <td><a href="/wiki/Methylamine" title="Methylamine">Methylamine</a></td> <td>127 mg/m<sup>3</sup></td> <td>100 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/74895.html">74895</a> </td></tr> <tr> <td>110-43-0</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0920.html">0920</a></td> <td><a href="/wiki/2-Heptanone" title="2-Heptanone">Methyl (n-amyl) ketone</a></td> <td>3736 mg/m<sup>3</sup></td> <td>800 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/110430.html">110430</a> </td></tr> <tr> <td>74-83-9</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0109.html">0109</a></td> <td><a href="/wiki/Bromomethane" title="Bromomethane">Methyl bromide</a></td> <td>972 mg/m<sup>3</sup></td> <td>250 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/74839.html">74839</a>, carcinogenic substance </td></tr> <tr> <td>109-86-4</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0061.html">0061</a></td> <td><a href="/wiki/2-Methoxyethanol" title="2-Methoxyethanol">Methyl Cellosolve</a></td> <td>622 mg/m<sup>3</sup></td> <td>200 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/109864.html">109864</a> </td></tr> <tr> <td>110-49-6</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0476.html">0476</a></td> <td><a href="/w/index.php?title=Methyl_Cellosolve_acetate&action=edit&redlink=1" class="new" title="Methyl Cellosolve acetate (page does not exist)">Methyl Cellosolve acetate</a></td> <td>966 mg/m<sup>3</sup></td> <td>200 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/110496.html">110496</a> </td></tr> <tr> <td>74-87-3</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0419.html">0419</a></td> <td><a href="/wiki/Chloromethane" title="Chloromethane">Methyl chloride</a></td> <td>4140 mg/m<sup>3</sup></td> <td>2000 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/74873.html">74873</a>, carcinogenic substance </td></tr> <tr> <td>71-55-6</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0079.html">0079</a></td> <td><a href="/wiki/1,1,1-Trichloroethane" title="1,1,1-Trichloroethane">Methyl chloroform</a></td> <td>3822 mg/m<sup>3</sup></td> <td>700 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/71556.html">71556</a> </td></tr> <tr> <td>108-87-2</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0923.html">0923</a></td> <td><a href="/wiki/Methylcyclohexane" title="Methylcyclohexane">Methylcyclohexane</a></td> <td>4824 mg/m<sup>3</sup></td> <td>1200 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/108872.html">108872</a> (10% Lower explosive limit LEL) </td></tr> <tr> <td>25639-42-3</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0292.html">0292</a></td> <td><a href="/w/index.php?title=Methylcyclohexanol&action=edit&redlink=1" class="new" title="Methylcyclohexanol (page does not exist)">Methylcyclohexanol</a></td> <td>2335 mg/m<sup>3</sup></td> <td>500 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/25639423.html">25639423</a> </td></tr> <tr> <td>583-60-8</td> <td>-</td> <td><a href="/w/index.php?title=2-Methylcyclohexanone&action=edit&redlink=1" class="new" title="2-Methylcyclohexanone (page does not exist)">2-Methylcyclohexanone</a></td> <td>2754 mg/m<sup>3</sup></td> <td>600 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/583608.html">583608</a> </td></tr> <tr> <td>101-68-8</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0298.html">0298</a></td> <td><a href="/wiki/Methylene_bisphenyl_isocyanate" class="mw-redirect" title="Methylene bisphenyl isocyanate">Methylene bisphenyl isocyanate</a></td> <td>75 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/101688.html">101688</a> </td></tr> <tr> <td>75-09-2</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0058.html">0058</a></td> <td><a href="/wiki/Dichloromethane" title="Dichloromethane">Methylene chloride</a></td> <td>7981 mg/m<sup>3</sup></td> <td>2300 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/75092.html">75092</a>, carcinogenic substance </td></tr> <tr> <td>107-31-3</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0664.html">0664</a></td> <td><a href="/wiki/Methyl_formate" title="Methyl formate">Methyl formate</a></td> <td>11070 mg/m<sup>3</sup></td> <td>4500 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/107313.html">107313</a> </td></tr> <tr> <td>541-85-5</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng1391.html">1391</a></td> <td><a href="/w/index.php?title=5-Methyl-3-heptanone&action=edit&redlink=1" class="new" title="5-Methyl-3-heptanone (page does not exist)">5-Methyl-3-heptanone</a></td> <td>524 mg/m<sup>3</sup></td> <td>100 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/541855.html">541855</a> </td></tr> <tr> <td>60-34-4</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0180.html">0180</a></td> <td><a href="/wiki/Methyl_hydrazine" class="mw-redirect" title="Methyl hydrazine">Methyl hydrazine</a></td> <td>37.8 mg/m<sup>3</sup></td> <td>20 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/60344.html">60344</a>, carcinogenic substance </td></tr> <tr> <td>74-88-4</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0509.html">0509</a></td> <td><a href="/wiki/Methyl_iodide" class="mw-redirect" title="Methyl iodide">Methyl iodide</a></td> <td>580 mg/m<sup>3</sup></td> <td>100 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/74884.html">74884</a>, carcinogenic substance </td></tr> <tr> <td>108-11-2</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0665.html">0665</a></td> <td><a href="/wiki/4-Methyl-2-pentanol" title="4-Methyl-2-pentanol">Methyl isobutyl carbinol</a></td> <td>1672 mg/m<sup>3</sup></td> <td>400 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/108112.html">108112</a> </td></tr> <tr> <td>624-83-9</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0004.html">0004</a></td> <td><a href="/wiki/Methyl_isocyanate" title="Methyl isocyanate">Methyl isocyanate</a></td> <td>7 mg/m<sup>3</sup></td> <td>3 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/624839.html">624839</a> </td></tr> <tr> <td>74-93-1</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0299.html">0299</a></td> <td><a href="/wiki/Methyl_mercaptan" class="mw-redirect" title="Methyl mercaptan">Methyl mercaptan</a></td> <td>295.5 mg/m<sup>3</sup></td> <td>150 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/74931.html">74931</a> </td></tr> <tr> <td>80-62-6</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0300.html">0300</a></td> <td><a href="/wiki/Methyl_methacrylate" title="Methyl methacrylate">Methyl methacrylate</a></td> <td>4090 mg/m<sup>3</sup></td> <td>1000 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/80626.html">80626</a> </td></tr> <tr> <td>98-83-9</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0732.html">0732</a></td> <td><a href="/wiki/Alpha-Methylstyrene" class="mw-redirect" title="Alpha-Methylstyrene">alpha-Methylstyrene</a></td> <td>3381 mg/m<sup>3</sup></td> <td>700 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/98839.html">98839</a> </td></tr> <tr> <td>12001-26-2</td> <td>-</td> <td><a href="/wiki/Mica" title="Mica">Mica</a></td> <td>1500 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/12001262.html">12001262</a> </td></tr> <tr> <td>7439-98-7</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng1003.html">1003</a></td> <td><a href="/wiki/Molybdenum" title="Molybdenum">Molybdenum</a></td> <td>5000 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/7439987.html">7439987</a> </td></tr> <tr> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng1003.html">1003</a></td> <td><a href="/wiki/Molybdenum" title="Molybdenum">Molybdenum, soluble compounds</a></td> <td>1000 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/moly-mo.html">moly-mo</a> </td></tr> <tr> <td>100-61-8</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0921.html">0921</a></td> <td><a href="/wiki/N-Methylaniline" title="N-Methylaniline">Monomethyl aniline</a></td> <td>438 mg/m<sup>3</sup></td> <td>100 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/100618.html">100618</a> </td></tr> <tr> <td>110-91-8</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0302.html">0302</a></td> <td><a href="/wiki/Morpholine" title="Morpholine">Morpholine</a></td> <td>1400 mg/m<sup>3</sup></td> <td>4984 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/110918.html">110918</a> (10% Lower explosive limit LEL) </td></tr> <tr> <td>8030-30-6</td> <td>-</td> <td><a href="/wiki/Naphtha" title="Naphtha">Naphtha (coal tar)</a></td> <td>4500 mg/m<sup>3</sup></td> <td>1000 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/8030306.html">8030306</a> (10% Lower explosive limit LEL) </td></tr> <tr> <td>91-20-3</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0667.html">0667</a></td> <td><a href="/wiki/Naphthalene" title="Naphthalene">Naphthalene</a></td> <td>1310 mg/m<sup>3</sup></td> <td>250 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/91203.html">91203</a> </td></tr> <tr> <td>13463-39-3</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0064.html">0064</a></td> <td><a href="/wiki/Nickel_tetracarbonyl" title="Nickel tetracarbonyl">Nickel carbonyl</a></td> <td>14 mg/m<sup>3</sup></td> <td>2 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/13463393.html">13463393</a>, carcinogenic substance </td></tr> <tr> <td>7440-02-0</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0062.html">0062</a></td> <td><a href="/wiki/Nickel" title="Nickel">Nickel</a></td> <td>10 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/7440020.html">7440020</a>, carcinogenic substance </td></tr> <tr> <td>54-11-5</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0519.html">0519</a></td> <td><a href="/wiki/Nicotine" title="Nicotine">Nicotine</a></td> <td>5 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/54115.html">54115</a> </td></tr> <tr> <td>7697-37-2</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0183.html">0183</a></td> <td><a href="/wiki/Nitric_acid" title="Nitric acid">Nitric acid</a></td> <td>64.5 mg/m<sup>3</sup></td> <td>25 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/7697372.html">7697372</a> </td></tr> <tr> <td>10102-43-9</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng1311.html">1311</a></td> <td><a href="/wiki/Nitric_oxide" title="Nitric oxide">Nitric oxide</a></td> <td>123 mg/m<sup>3</sup></td> <td>100 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/10102439.html">10102439</a> </td></tr> <tr> <td>100-01-6</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0308.html">0308</a></td> <td><a href="/wiki/4-Nitroaniline" title="4-Nitroaniline">p-Nitroaniline</a></td> <td>300 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/100016.html">100016</a> </td></tr> <tr> <td>98-95-3</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0065.html">0065</a></td> <td><a href="/wiki/Nitrobenzene" title="Nitrobenzene">Nitrobenzene</a></td> <td>1008 mg/m<sup>3</sup></td> <td>200 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/98953.html">98953</a> </td></tr> <tr> <td>100-00-5</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0846.html">0846</a></td> <td><a href="/wiki/4-Nitrochlorobenzene" title="4-Nitrochlorobenzene">p-Nitrochlorobenzene</a></td> <td>100 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/100005.html">100005</a> </td></tr> <tr> <td>79-24-3</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0817.html">0817</a></td> <td><a href="/wiki/Nitroethane" title="Nitroethane">Nitroethane</a></td> <td>3070 mg/m<sup>3</sup></td> <td>1000 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/79243.html">79243</a> </td></tr> <tr> <td>10102-44-0</td> <td><a rel="nofollow" class="external text" href="https://web.archive.org/web/20180612144448/https://www.cdc.gov/niosh/ipcsneng/neng0930.html">0930</a></td> <td><a href="/wiki/Nitrogen_dioxide" title="Nitrogen dioxide">Nitrogen dioxide</a></td> <td>37.6 mg/m<sup>3</sup></td> <td>20 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/10102440.html">10102440</a> </td></tr> <tr> <td>7783-54-2</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng1234.html">1234</a></td> <td><a href="/wiki/Nitrogen_trifluoride" title="Nitrogen trifluoride">Nitrogen trifluoride</a></td> <td>2900 mg/m<sup>3</sup></td> <td>2000 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/7783542.html">7783542</a> </td></tr> <tr> <td>55-63-0</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0186.html">0186</a></td> <td><a href="/wiki/Nitroglycerin" title="Nitroglycerin">Nitroglycerine</a></td> <td>75 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/55630.html">55630</a> </td></tr> <tr> <td>75-52-5</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0522.html">0522</a></td> <td><a href="/wiki/Nitromethane" title="Nitromethane">Nitromethane</a></td> <td>1875 mg/m<sup>3</sup></td> <td>750 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/75525.html">75525</a> </td></tr> <tr> <td>108-03-2</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng1050.html">1050</a></td> <td><a href="/wiki/1-Nitropropane" title="1-Nitropropane">1-Nitropropane</a></td> <td>3640 mg/m<sup>3</sup></td> <td>1000 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/108032.html">108032</a> </td></tr> <tr> <td>79-46-9</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0187.html">0187</a></td> <td><a href="/wiki/2-Nitropropane" title="2-Nitropropane">2-Nitropropane</a></td> <td>354 mg/m<sup>3</sup></td> <td>100 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/79469.html">79469</a>, carcinogenic substance </td></tr> <tr> <td>99-08-1</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng1411.html">1411</a></td> <td><a href="/wiki/3-Nitrotoluene" title="3-Nitrotoluene">m-Nitrotoluene</a></td> <td>1122 mg/m<sup>3</sup></td> <td>200 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/88722.html">88722</a> </td></tr> <tr> <td>88-72-2</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0931.html">0931</a></td> <td><a href="/wiki/2-Nitrotoluene" title="2-Nitrotoluene">o-Nitrotoluene</a></td> <td>1122 mg/m<sup>3</sup></td> <td>200 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/88722.html">88722</a> </td></tr> <tr> <td>99-99-0</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0932.html">0932</a></td> <td><a href="/wiki/4-Nitrotoluene" title="4-Nitrotoluene">p-Nitrotoluene</a></td> <td>1122 mg/m<sup>3</sup></td> <td>200 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/88722.html">88722</a> </td></tr> <tr> <td>2234-13-1</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng1059.html">1059</a></td> <td><a href="/w/index.php?title=Octachloronaphthalene&action=edit&redlink=1" class="new" title="Octachloronaphthalene (page does not exist)">Octachloronaphthalene</a></td> <td>~1 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/2234131.html">2234131</a> </td></tr> <tr> <td>111-65-9</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0933.html">0933</a></td> <td><a href="/wiki/Octane" title="Octane">Octane</a></td> <td>4670 mg/m<sup>3</sup></td> <td>1000 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/111659.html">111659</a> (10% Lower explosive limit LEL) </td></tr> <tr> <td>8012-95-1</td> <td>-</td> <td><a href="/wiki/Oil_mist" title="Oil mist">Oil mist (mineral)</a></td> <td>2500 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/8012951.html">8012951</a> </td></tr> <tr> <td>20816-12-0</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0528.html">0528</a></td> <td><a href="/wiki/Osmium_tetroxide" title="Osmium tetroxide">Osmium tetroxide</a></td> <td>1 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/20816120.html">20816120</a> </td></tr> <tr> <td>7783-41-7</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0818.html">0818</a></td> <td><a href="/wiki/Oxygen_difluoride" title="Oxygen difluoride">Oxygen difluoride</a></td> <td>1 mg/m<sup>3</sup></td> <td>0.5 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/7783417.html">7783417</a> </td></tr> <tr> <td>10028-15-6</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0068.html">0068</a></td> <td><a href="/wiki/Ozone" title="Ozone">Ozone</a></td> <td>9.8 mg/m<sup>3</sup></td> <td>5 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/10028156.html">10028156</a> </td></tr> <tr> <td>1910-42-5</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0005.html">0005</a></td> <td><a href="/wiki/Paraquat" title="Paraquat">Paraquat</a></td> <td>1 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/1910425.html">1910425</a> </td></tr> <tr> <td>56-38-2</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0006.html">0006</a></td> <td><a href="/wiki/Parathion" title="Parathion">Parathion</a></td> <td>10 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/56382.html">56382</a> </td></tr> <tr> <td>19624-22-7</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0819.html">0819</a></td> <td><a href="/wiki/Pentaborane" title="Pentaborane">Pentaborane</a></td> <td>2.6 mg/m<sup>3</sup></td> <td>1 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/19624227.html">19624227</a> </td></tr> <tr> <td>87-86-5</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0069.html">0069</a></td> <td><a href="/wiki/Pentachlorophenol" title="Pentachlorophenol">Pentachlorophenol</a></td> <td>2.5 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/87865.html">87865</a> </td></tr> <tr> <td>109-66-0</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0534.html">0534</a></td> <td><a href="/wiki/Pentane" title="Pentane">n-Pentane</a></td> <td>4425 mg/m<sup>3</sup></td> <td>1500 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/109660.html">109660</a> (10% Lower explosive limit LEL) </td></tr> <tr> <td>107-87-9</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0816.html">0816</a></td> <td><a href="/wiki/2-Pentanone" title="2-Pentanone">2-Pentanone</a></td> <td>5280 mg/m<sup>3</sup></td> <td>1500 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/107879.html">107879</a> </td></tr> <tr> <td>594-42-3</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0311.html">0311</a></td> <td><a href="/wiki/Perchloromethyl_mercaptan" class="mw-redirect" title="Perchloromethyl mercaptan">Perchloromethyl mercaptan</a></td> <td>10 mg/m<sup>3</sup></td> <td>76 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/594423.html">594423</a> </td></tr> <tr> <td>7616-94-6</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng1114.html">1114</a></td> <td><a href="/wiki/Perchloryl_fluoride" title="Perchloryl fluoride">Perchloryl fluoride</a></td> <td>419 mg/m<sup>3</sup></td> <td>100 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/7616946.html">7616946</a> </td></tr> <tr> <td>8002-05-9</td> <td><a rel="nofollow" class="external autonumber" href="https://www.cdc.gov/niosh/ipcsneng/neng.html">[1]</a><sup class="noprint Inline-Template"><span style="white-space: nowrap;">[<i><a href="/wiki/Wikipedia:Link_rot" title="Wikipedia:Link rot"><span title=" Dead link tagged December 2017">permanent dead link</span></a></i><span style="visibility:hidden; color:transparent; padding-left:2px">‍</span>]</span></sup></td> <td><a href="/wiki/Naphtha" title="Naphtha">Petroleum distillates (naphtha)</a></td> <td>4455 mg/m<sup>3</sup></td> <td>1100 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/8002059.html">8002059</a> (10% Lower explosive limit LEL) </td></tr> <tr> <td>108-95-2</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0070.html">0070</a></td> <td><a href="/wiki/Phenol" title="Phenol">Phenol</a></td> <td>962 mg/m<sup>3</sup></td> <td>250 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/108952.html">108952</a> </td></tr> <tr> <td>106-50-3</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0805.html">0805</a></td> <td><a href="/wiki/P-Phenylenediamine" title="P-Phenylenediamine">p-Phenylene diamine</a></td> <td>25 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/106503.html">106503</a> </td></tr> <tr> <td>101-84-8</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0791.html">0791</a></td> <td><a href="/wiki/Diphenyl_ether" title="Diphenyl ether">Phenyl ether</a></td> <td>100 mg/m<sup>3</sup></td> <td>696 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/101848.html">101848</a> </td></tr> <tr> <td>122-60-1</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0188.html">0188</a></td> <td><a href="/wiki/Phenyl_glycidyl_ether" title="Phenyl glycidyl ether">Phenyl glycidyl ether</a></td> <td>614 mg/m<sup>3</sup></td> <td>100 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/122601.html">122601</a>, carcinogenic substance </td></tr> <tr> <td>100-63-0</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0938.html">0938</a></td> <td><a href="/wiki/Phenylhydrazine" title="Phenylhydrazine">Phenylhydrazine</a></td> <td>66.3 mg/m<sup>3</sup></td> <td>15 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/100630.html">100630</a>, carcinogenic substance </td></tr> <tr> <td>7786-34-7</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0924.html">0924</a></td> <td><a href="/wiki/Mevinphos" title="Mevinphos">Phosdrin</a></td> <td>36.7 mg/m<sup>3</sup></td> <td>4 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/7786347.html">7786347</a> </td></tr> <tr> <td>75-44-5</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0007.html">0007</a></td> <td><a href="/wiki/Phosgene" title="Phosgene">Phosgene</a></td> <td>8.1 mg/m<sup>3</sup></td> <td>2 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/75445.html">75445</a> </td></tr> <tr> <td>7803-51-2</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0694.html">0694</a></td> <td><a href="/wiki/Phosphine" title="Phosphine">Phosphine</a></td> <td>69.5 mg/m<sup>3</sup></td> <td>50 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/7803512.html">7803512</a> </td></tr> <tr> <td>7664-38-2</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng1008.html">1008</a></td> <td><a href="/wiki/Phosphoric_acid" title="Phosphoric acid">Phosphoric acid</a></td> <td>1000 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/7664382.html">7664382</a> </td></tr> <tr> <td>7723-14-0</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0628.html">0628</a></td> <td><a href="/wiki/Phosphorus" title="Phosphorus">Phosphorus (yellow)</a></td> <td>5 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/">7723140.html 7723140</a> </td></tr> <tr> <td>10026-13-8</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0544.html">0544</a></td> <td><a href="/wiki/Phosphorus_pentachloride" title="Phosphorus pentachloride">Phosphorus pentachloride</a></td> <td>70 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/10026138.html">10026138</a> </td></tr> <tr> <td>1314-80-3</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng1407.html">1407</a></td> <td><a href="/wiki/Phosphorus_pentasulfide" title="Phosphorus pentasulfide">Phosphorus pentasulfide</a></td> <td>250 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/1314803.html">1314803</a> </td></tr> <tr> <td>7719-12-2</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0696.html">0696</a></td> <td><a href="/wiki/Phosphorus_trichloride" title="Phosphorus trichloride">Phosphorus trichloride</a></td> <td>140 mg/m<sup>3</sup></td> <td>25 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/7719122.html">7719122</a> </td></tr> <tr> <td>85-44-9</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0315.html">0315</a></td> <td><a href="/wiki/Phthalic_anhydride" title="Phthalic anhydride">Phthalic anhydride</a></td> <td>60 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/85449.html">85449</a> </td></tr> <tr> <td>88-89-1</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0316.html">0316</a></td> <td><a href="/wiki/Picric_acid" title="Picric acid">Picric acid</a></td> <td>75 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/88891.html">88891</a> </td></tr> <tr> <td>83-26-1</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng1515.html">1515</a></td> <td><a href="/wiki/Pindone" title="Pindone">Pindone</a></td> <td>100 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/83261.html">83261</a> </td></tr> <tr> <td>-</td> <td>-</td> <td><a href="/wiki/Platinum" title="Platinum">Platinum (soluble salts, as Pt)</a></td> <td>4 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/platinum.html">platinum</a> </td></tr> <tr> <td>65997-15-1</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng1425.html">1425</a></td> <td><a href="/wiki/Portland_cement" title="Portland cement">Portland cement</a></td> <td>5000 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/65997151.html">65997151</a> </td></tr> <tr> <td>151-50-8</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0671.html">0671</a></td> <td><a href="/wiki/Potassium_cyanide" title="Potassium cyanide">Potassium cyanide</a></td> <td>25 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/cyanides.html">cyanides</a> </td></tr> <tr> <td>74-98-6</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0319.html">0319</a></td> <td><a href="/wiki/Propane" title="Propane">Propane</a></td> <td>3780 mg/m<sup>3</sup></td> <td>2100 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/74986.html">74986</a> (10% Lower explosive limit LEL) </td></tr> <tr> <td>109-60-4</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0940.html">0940</a></td> <td><a href="/wiki/Propyl_acetate" title="Propyl acetate">n-Propyl acetate</a></td> <td>7106 mg/m<sup>3</sup></td> <td>1700 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/109604.html">109604</a> </td></tr> <tr> <td>71-23-8</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0553.html">0553</a></td> <td><a href="/wiki/1-Propanol" title="1-Propanol">n-Propyl alcohol</a></td> <td>1968 mg/m<sup>3</sup></td> <td>800 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/71238.html">71238</a> </td></tr> <tr> <td>78-87-5</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0441.html">0441</a></td> <td><a href="/wiki/Dichloropropane" title="Dichloropropane">Propylene dichloride</a></td> <td>1848 mg/m<sup>3</sup></td> <td>400 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/78875.html">78875</a>, carcinogenic substance </td></tr> <tr> <td>75-55-8</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0322.html">0322</a></td> <td><a href="/wiki/Propyleneimine" title="Propyleneimine">Propylene imine</a></td> <td>234 mg/m<sup>3</sup></td> <td>100 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/75558.html">75558</a>, carcinogenic substance </td></tr> <tr> <td>75-56-9</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0192.html">0192</a></td> <td><a href="/wiki/Propylene_oxide" title="Propylene oxide">Propylene oxide</a></td> <td>952 mg/m<sup>3</sup></td> <td>400 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/75569.html">75569</a>, carcinogenic substance </td></tr> <tr> <td>627-13-4</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng1513.html">1513</a></td> <td><a href="/w/index.php?title=N-Propyl_nitrate&action=edit&redlink=1" class="new" title="N-Propyl nitrate (page does not exist)">n-Propyl nitrate</a></td> <td>2150 mg/m<sup>3</sup></td> <td>500 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/627134.html">627134</a> </td></tr> <tr> <td>8003-34-7</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng1475.html">1475</a></td> <td><a href="/w/index.php?title=Pyrethrum_extract&action=edit&redlink=1" class="new" title="Pyrethrum extract (page does not exist)">Pyrethrum</a></td> <td>5000 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/8003347.html">8003347</a> </td></tr> <tr> <td>110-86-1</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0323.html">0323</a></td> <td><a href="/wiki/Pyridine" title="Pyridine">Pyridine</a></td> <td>3240 mg/m<sup>3</sup></td> <td>1000 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/110861.html">110861</a> </td></tr> <tr> <td>106-51-4</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0779.html">0779</a></td> <td><a href="/wiki/Quinone" title="Quinone">Quinone</a></td> <td>100 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/106514.html">106514</a> </td></tr> <tr> <td>7440-16-6</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng1247.html">1247</a></td> <td><a href="/wiki/Rhodium" title="Rhodium">Rhodium (metal fume and insoluble compounds, as Rh)</a></td> <td>100 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/rhodium.html">rhodium</a> </td></tr> <tr> <td>-</td> <td>-</td> <td><a href="/wiki/Rhodium" title="Rhodium">Rhodium (soluble compounds, as Rh)</a></td> <td>2 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/rhodium.html">rhodium</a> </td></tr> <tr> <td>299-84-3</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0975.html">0975</a></td> <td><a href="/w/index.php?title=Ronnel&action=edit&redlink=1" class="new" title="Ronnel (page does not exist)">Ronnel</a></td> <td>300 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/299843.html">299843</a> </td></tr> <tr> <td>83-79-4</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0944.html">0944</a></td> <td><a href="/wiki/Rotenone" title="Rotenone">Rotenone</a></td> <td>2500 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/83794.html">83794</a> </td></tr> <tr> <td>7782-49-2</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0072.html">0072</a></td> <td><a href="/wiki/Selenium" title="Selenium">Selenium</a></td> <td>1 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/7782492.html">7782492</a> </td></tr> <tr> <td>7783-79-1</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0947.html">0947</a></td> <td><a href="/wiki/Selenium_hexafluoride" title="Selenium hexafluoride">Selenium hexafluoride</a></td> <td>15.8 mg/m<sup>3</sup></td> <td>2 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/7783791.html">7783791</a> </td></tr> <tr> <td>7631-86-9</td> <td>-</td> <td><a href="/wiki/Silicon_dioxide" title="Silicon dioxide">Silica, amorphous</a></td> <td>3000 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/7631869.html">7631869</a> </td></tr> <tr> <td>14808-60-7</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0808.html">0808</a></td> <td><a href="/wiki/Silicon_dioxide" title="Silicon dioxide">Silica, crystalline</a></td> <td>25/50 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/14808607.html">14808607</a>, carcinogenic substance (25 mg/m<sup>3</sup> – cristobalite, tridymite; 50 mg/m<sup>3</sup> – crystalline silica) </td></tr> <tr> <td>7440-22-4</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0810.html">0810</a></td> <td><a href="/wiki/Silver" title="Silver">Silver</a></td> <td>10 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/7440224.html">7440224</a> </td></tr> <tr> <td>-</td> <td>-</td> <td><a href="/wiki/Soapstone" title="Soapstone">Soapstone (containing less than 1% quartz)</a></td> <td>3000 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/soapston.html">soapston</a> </td></tr> <tr> <td>15096-52-3</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng1565.html">1565</a></td> <td><a href="/wiki/Sodium_hexafluoroaluminate" title="Sodium hexafluoroaluminate">Sodium aluminum fluoride</a></td> <td>250 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/fluoride.html">fluoride</a> </td></tr> <tr> <td>143-33-9</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng1118.html">1118</a></td> <td><a href="/wiki/Sodium_cyanide" title="Sodium cyanide">Sodium cyanide</a></td> <td>25 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/cyanides.html">cyanides</a> </td></tr> <tr> <td>7681-49-4</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0951.html">0951</a></td> <td><a href="/wiki/Sodium_fluoride" title="Sodium fluoride">Sodium fluoride</a></td> <td>250 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/fluoride.html">fluoride</a> </td></tr> <tr> <td>62-74-8</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0484.html">0484</a></td> <td><a href="/wiki/Sodium_fluoroacetate" title="Sodium fluoroacetate">Sodium fluoroacetate</a></td> <td>2.5 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/62748.html">62748</a> </td></tr> <tr> <td>1310-73-2</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0360.html">0360</a></td> <td><a href="/wiki/Sodium_hydroxide" title="Sodium hydroxide">Sodium hydroxide</a></td> <td>10 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/1310732.html">1310732</a> </td></tr> <tr> <td>7803-52-3</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0776.html">0776</a></td> <td><a href="/wiki/Stibine" title="Stibine">Stibine</a></td> <td>25.5 mg/m<sup>3</sup></td> <td>5 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/7803523.html">7803523</a> </td></tr> <tr> <td>8052-41-3</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0361.html">0361</a></td> <td><a href="/wiki/White_spirit" title="White spirit">Stoddard solvent</a></td> <td>20 000 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/8052413.html">8052413</a> </td></tr> <tr> <td>57-24-9</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0197.html">0197</a></td> <td><a href="/wiki/Strychnine" title="Strychnine">Strychnine</a></td> <td>3 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/57249.html">57249</a> </td></tr> <tr> <td>100-42-5</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0073.html">0073</a></td> <td><a href="/wiki/Styrene" title="Styrene">Styrene</a></td> <td>2982 mg/m<sup>3</sup></td> <td>700 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/100425.html">100425</a> </td></tr> <tr> <td>7446-09-5</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0074.html">0074</a></td> <td><a href="/wiki/Sulfur_dioxide" title="Sulfur dioxide">Sulfur dioxide</a></td> <td>262 mg/m<sup>3</sup></td> <td>100 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/7446095.html">7446095</a> </td></tr> <tr> <td>7664-93-9</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0362.html">0362</a></td> <td><a href="/wiki/Sulfuric_acid" title="Sulfuric acid">Sulfuric acid</a></td> <td>15 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/7664939.html">7664939</a> </td></tr> <tr> <td>10025-67-9</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0958.html">0958</a></td> <td><a href="/wiki/Disulfur_dichloride" title="Disulfur dichloride">Sulfur monochloride</a></td> <td>27.6 mg/m<sup>3</sup></td> <td>5 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/10025679.html">10025679</a> </td></tr> <tr> <td>5714-22-7</td> <td>-</td> <td><a href="/wiki/Disulfur_decafluoride" title="Disulfur decafluoride">Sulfur pentafluoride</a></td> <td>10.4 mg/m<sup>3</sup></td> <td>1 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/5714227.html">5714227</a> </td></tr> <tr> <td>2699-79-8</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng1402.html">1402</a></td> <td><a href="/wiki/Sulfuryl_fluoride" title="Sulfuryl fluoride">Sulfuryl fluoride</a></td> <td>836 mg/m<sup>3</sup></td> <td>200 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/2699798.html">2699798</a> </td></tr> <tr> <td>93-76-5</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0075.html">0075</a></td> <td><a href="/wiki/2,4,5-Trichlorophenoxyacetic_acid" title="2,4,5-Trichlorophenoxyacetic acid">2,4,5-Trichlorophenoxyacetic acid</a></td> <td>250 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/93765.html">93765</a> </td></tr> <tr> <td>14807-96-6</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0329.html">0329</a></td> <td><a href="/wiki/Talc" title="Talc">Talc</a></td> <td>1000 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/14807966.html">14807966</a> </td></tr> <tr> <td>7440-25-7</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng1596.html">1596</a></td> <td><a href="/wiki/Tantalum" title="Tantalum">Tantalum</a></td> <td>2500 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/7440257.html">7440257</a> </td></tr> <tr> <td>3689-24-5</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0985.html">0985</a></td> <td><a href="/wiki/Sulfotep" title="Sulfotep">TEDP</a></td> <td>10 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/3689245.html">3689245</a> </td></tr> <tr> <td>13494-80-9</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0986.html">0986</a></td> <td><a href="/wiki/Tellurium" title="Tellurium">Tellurium</a></td> <td>25 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/13494809.html">13494809</a> </td></tr> <tr> <td>7783-80-4</td> <td>-</td> <td><a href="/wiki/Tellurium_hexafluoride" title="Tellurium hexafluoride">Tellurium hexafluoride</a></td> <td>9.9 mg/m<sup>3</sup></td> <td>1 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/7783804.html">7783804</a> </td></tr> <tr> <td>107-49-3</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng1158.html">1158</a></td> <td><a href="/wiki/Tetraethyl_pyrophosphate" title="Tetraethyl pyrophosphate">TEPP</a></td> <td>5 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/107493.html">107493</a> </td></tr> <tr> <td>92-06-8</td> <td>-</td> <td><a href="/wiki/Terphenyl" title="Terphenyl">m-Terphenyl</a></td> <td>500 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/26140603.html">26140603</a> </td></tr> <tr> <td>84-15-1</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng1525.html">1525</a></td> <td><a href="/wiki/Terphenyl" title="Terphenyl">o-Terphenyl</a></td> <td>500 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/26140603.html">26140603</a> </td></tr> <tr> <td>92-94-4</td> <td>-</td> <td><a href="/wiki/Terphenyl" title="Terphenyl">p-Terphenyl</a></td> <td>500 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/26140603.html">26140603</a> </td></tr> <tr> <td>76-11-9</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng1420.html">1420</a></td> <td><a href="/wiki/1,1,1,2-Tetrachloro-2,2-difluoroethane" class="mw-redirect" title="1,1,1,2-Tetrachloro-2,2-difluoroethane">1,1,1,2-Tetrachloro-2,2-difluoroethane</a></td> <td>16680 mg/m<sup>3</sup></td> <td>2000 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/76119.html">76119</a> </td></tr> <tr> <td>76-12-0</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng1421.html">1421</a></td> <td><a href="/wiki/Freon_112" class="mw-redirect" title="Freon 112">Freon 112</a></td> <td>16680 mg/m<sup>3</sup></td> <td>2000 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/76120.html">76120</a> </td></tr> <tr> <td>79-34-5</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0332.html">0332</a></td> <td><a href="/wiki/1,1,2,2-Tetrachloroethane" title="1,1,2,2-Tetrachloroethane">1,1,2,2-Tetrachloroethane</a></td> <td>687 mg/m<sup>3</sup></td> <td>100 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/79345.html">79345</a>, carcinogenic substance </td></tr> <tr> <td>127-18-4</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0076.html">0076</a></td> <td><a href="/wiki/Tetrachloroethylene" title="Tetrachloroethylene">Tetrachloroethylene</a></td> <td>1017 mg/m<sup>3</sup></td> <td>150 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/127184.html">127184</a>, carcinogenic substance </td></tr> <tr> <td>78-00-2</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0008.html">0008</a></td> <td><a href="/wiki/Tetraethyl_lead" class="mw-redirect" title="Tetraethyl lead">Tetraethyl lead</a></td> <td>40 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/78002.html">78002</a> </td></tr> <tr> <td>109-99-9</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0578.html">0578</a></td> <td><a href="/wiki/Tetrahydrofuran" title="Tetrahydrofuran">Tetrahydrofuran</a></td> <td>5900 mg/m<sup>3</sup></td> <td>2000 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/109999.html">109999</a> (10% Lower explosive limit LEL) </td></tr> <tr> <td>75-74-1</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0200.html">0200</a></td> <td><a href="/wiki/Tetramethyl_lead" class="mw-redirect" title="Tetramethyl lead">Tetramethyl lead</a></td> <td>40 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/75741.html">75741</a> </td></tr> <tr> <td>3333-52-6</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng1121.html">1121</a></td> <td><a href="/wiki/Tetramethylsuccinonitrile" title="Tetramethylsuccinonitrile">Tetramethyl succinonitrile</a></td> <td>27.9 mg/m<sup>3</sup></td> <td>5 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/3333526.html">3333526</a> </td></tr> <tr> <td>509-14-8</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng1468.html">1468</a></td> <td><a href="/wiki/Tetranitromethane" title="Tetranitromethane">Tetranitromethane</a></td> <td>32 mg/m<sup>3</sup></td> <td>4 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/509148.html">509148</a> </td></tr> <tr> <td>479-45-8</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0959.html">0959</a></td> <td><a href="/wiki/Tetryl" title="Tetryl">Tetryl</a></td> <td>750 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/479458.html">479458</a> </td></tr> <tr> <td>-</td> <td>-</td> <td><a href="/wiki/Thallium" title="Thallium">Thallium (soluble compounds)</a></td> <td>15 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/thallium.html">thallium</a> </td></tr> <tr> <td>137-26-8</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0757.html">0757</a></td> <td><a href="/wiki/Thiram" title="Thiram">Thiram</a></td> <td>100 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/137268.html">137268</a> </td></tr> <tr> <td>7440-31-5</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng1535.html">1535</a></td> <td><a href="/wiki/Tin" title="Tin">Tin</a></td> <td>100 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/7440315.html">7440315</a> </td></tr> <tr> <td>-</td> <td>-</td> <td><a href="/wiki/Tin" title="Tin">Tin (organic compounds)</a></td> <td>25 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/tin-org.html">tin-org</a> </td></tr> <tr> <td>13463-67-7</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0338.html">0338</a></td> <td><a href="/wiki/Titanium_dioxide" title="Titanium dioxide">Titanium dioxide</a></td> <td>5000 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/13463677.html">13463677</a>, carcinogenic substance </td></tr> <tr> <td>108-88-3</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0078.html">0078</a></td> <td><a href="/wiki/Toluene" title="Toluene">Toluene</a></td> <td>1885 mg/m<sup>3</sup></td> <td>500 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/108883.html">108883</a> </td></tr> <tr> <td>584-84-9</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0339.html">0339</a></td> <td><a href="/wiki/Toluene_diisocyanate" title="Toluene diisocyanate">Toluene-2,4-diisocyanate</a></td> <td>17.8 mg/m<sup>3</sup></td> <td>2.5 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/584849.html">584849</a>, carcinogenic substance </td></tr> <tr> <td>95-53-4</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0341.html">0341</a></td> <td><a href="/wiki/Toluidine" title="Toluidine">o-Toluidine</a></td> <td>219 mg/m<sup>3</sup></td> <td>50 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/95534.html">95534</a>, carcinogenic substance </td></tr> <tr> <td>126-73-8</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0584.html">0584</a></td> <td><a href="/wiki/Tributyl_phosphate" title="Tributyl phosphate">Tributyl phosphate</a></td> <td>327 mg/m<sup>3</sup></td> <td>30 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/126738.html">126738</a> </td></tr> <tr> <td>79-00-5</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0080.html">0080</a></td> <td><a href="/wiki/1,1,2-Trichloroethane" title="1,1,2-Trichloroethane">1,1,2-Trichloroethane</a></td> <td>546 mg/m<sup>3</sup></td> <td>100 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/79005.html">79005</a>, carcinogenic substance </td></tr> <tr> <td>79-01-6</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0081.html">0081</a></td> <td><a href="/wiki/Trichloroethylene" title="Trichloroethylene">Trichloroethylene</a></td> <td>5370 mg/m<sup>3</sup></td> <td>1000 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/79016.html">79016</a>, carcinogenic substance </td></tr> <tr> <td>96-18-4</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0683.html">0683</a></td> <td><a href="/wiki/1,2,3-Trichloropropane" title="1,2,3-Trichloropropane">1,2,3-Trichloropropane</a></td> <td>603 mg/m<sup>3</sup></td> <td>100 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/96184.html">96184</a>, carcinogenic substance </td></tr> <tr> <td>76-13-1</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0050.html">0050</a></td> <td><a href="/wiki/1,1,2-Trichloro-1,2,2-trifluoroethane" title="1,1,2-Trichloro-1,2,2-trifluoroethane">1,1,2-Trichloro-1,2,2-trifluoroethane</a></td> <td>15340 mg/m<sup>3</sup></td> <td>2000 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/76131.html">76131</a> </td></tr> <tr> <td>121-44-8</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0203.html">0203</a></td> <td><a href="/wiki/Triethylamine" title="Triethylamine">Triethylamine</a></td> <td>828 mg/m<sup>3</sup></td> <td>200 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/121448.html">121448</a> </td></tr> <tr> <td>75-63-8</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0837.html">0837</a></td> <td><a href="/wiki/Bromotrifluoromethane" title="Bromotrifluoromethane">Trifluorobromomethane</a></td> <td>243 600 mg/m<sup>3</sup></td> <td>40 000 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/75638.html">75638</a> </td></tr> <tr> <td>118-96-7</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0967.html">0967</a></td> <td><a href="/wiki/Trinitrotoluene" class="mw-redirect" title="Trinitrotoluene">2,4,6-Trinitrotoluene</a></td> <td>500 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/118967.html">118967</a> </td></tr> <tr> <td>78-30-8</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0961.html">0961</a></td> <td><a href="/wiki/Triorthocresyl_phosphate" class="mw-redirect" title="Triorthocresyl phosphate">Triorthocresyl phosphate</a></td> <td>40 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/78308.html">78308</a> </td></tr> <tr> <td>115-86-6</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng1062.html">1062</a></td> <td><a href="/wiki/Triphenyl_phosphate" title="Triphenyl phosphate">Triphenyl phosphate</a></td> <td>1000 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/115866.html">115866</a> </td></tr> <tr> <td>8006-64-2</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng1063.html">1063</a></td> <td><a href="/wiki/Turpentine" title="Turpentine">Turpentine</a></td> <td>4448 mg/m<sup>3</sup></td> <td>8000 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/8006642.html">8006642</a> </td></tr> <tr> <td>7440-61-1</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng1251.html">1251</a></td> <td><a href="/wiki/Uranium" title="Uranium">Uranium (insoluble compounds)</a></td> <td>10 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/7440611.html">7440611</a>, carcinogenic substance </td></tr> <tr> <td>-</td> <td>-</td> <td><a href="/wiki/Uranium" title="Uranium">Uranium (soluble compounds)</a></td> <td>10 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/uranium.html">uranium</a>, carcinogenic substance </td></tr> <tr> <td>7440-62-2</td> <td>-</td> <td><a href="/wiki/Vanadium" title="Vanadium">Vanadium dust</a></td> <td>35 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/vandust.html">vandust</a> </td></tr> <tr> <td>1314-62-1</td> <td>-</td> <td><a href="/wiki/Vanadium" title="Vanadium">Vanadium fume</a></td> <td>35 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/vanfume.html">vanfume</a> </td></tr> <tr> <td>25013-15-4</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0514.html">0514</a></td> <td><a href="/w/index.php?title=Vinyl_toluene&action=edit&redlink=1" class="new" title="Vinyl toluene (page does not exist)">Vinyl toluene</a></td> <td>1932 mg/m<sup>3</sup></td> <td>400 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/25013154.html">25013154</a> </td></tr> <tr> <td>81-81-2</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0821.html">0821</a></td> <td><a href="/wiki/Warfarin" title="Warfarin">Warfarin</a></td> <td>100 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/81812.html">81812</a> </td></tr> <tr> <td>108-38-3</td> <td><a rel="nofollow" class="external text" href="https://web.archive.org/web/20171205042535/https://www.cdc.gov/niosh/ipcsneng/neng0085.html">0085</a></td> <td><a href="/wiki/M-Xylene" title="M-Xylene">m-Xylene</a></td> <td>3906 mg/m<sup>3</sup></td> <td>900 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/95476.html">95476</a> </td></tr> <tr> <td>95-47-6</td> <td><a rel="nofollow" class="external text" href="https://web.archive.org/web/20171123043117/https://www.cdc.gov/niosh/ipcsneng/neng0084.html">0084</a></td> <td><a href="/wiki/O-Xylene" title="O-Xylene">o-Xylene</a></td> <td>3906 mg/m<sup>3</sup></td> <td>900 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/95476.html">95476</a> </td></tr> <tr> <td>106-42-3</td> <td><a rel="nofollow" class="external text" href="https://web.archive.org/web/20171205042322/https://www.cdc.gov/niosh/ipcsneng/neng0086.html">0086</a></td> <td><a href="/wiki/P-Xylene" title="P-Xylene">p-Xylene</a></td> <td>3906 mg/m<sup>3</sup></td> <td>900 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/95476.html">95476</a> </td></tr> <tr> <td>1300-73-8</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0600.html">0600</a></td> <td><a href="/wiki/Xylidine" title="Xylidine">Xylidine</a></td> <td>248 mg/m<sup>3</sup></td> <td>50 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/1300738.html">1300738</a> </td></tr> <tr> <td>7440-65-5</td> <td>-</td> <td><a href="/wiki/Yttrium" title="Yttrium">Yttrium</a></td> <td>500 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/7440655.html">7440655</a> </td></tr> <tr> <td>7646-85-7</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng1064.html">1064</a></td> <td><a href="/wiki/Zinc_chloride" title="Zinc chloride">Zinc chloride fume</a></td> <td>50 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/7646857.html">7646857</a> </td></tr> <tr> <td>1314-13-2</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0208.html">0208</a></td> <td><a href="/wiki/Zinc_oxide" title="Zinc oxide">Zinc oxide</a></td> <td>500 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/1314132.html">1314132</a> </td></tr> <tr> <td>7440-67-7</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng1405.html">1405</a></td> <td><a href="/wiki/Zirconium" title="Zirconium">Zirconium compounds</a></td> <td>25 mg/m<sup>3</sup></td> <td>-</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/7440677.html">7440677</a> </td></tr></tbody></table> <table class="wikitable collapsible collapsed sortable" style="text-align:center"> <tbody><tr> <th colspan="7">IDLH values for several gases and vapors <i>(military)</i> </th></tr> <tr> <th colspan="2">Number</th> <th rowspan="2">Substance</th> <th colspan="2">IDLH value</th> <th rowspan="2">Source </th></tr> <tr> <th><a href="/wiki/CAS_Registry_Number" title="CAS Registry Number">CAS</a></th> <th><a href="/wiki/International_Chemical_Safety_Cards" title="International Chemical Safety Cards">ICSC</a></th> <th>mg/m<sup>3</sup></th> <th>ppm </th></tr> <tr> <td>7782-50-5</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0126.html">0126</a></td> <td><a href="/wiki/Chlorine" title="Chlorine">Chlorine</a></td> <td>29 mg/m<sup>3</sup></td> <td>10 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/7782505.html">7782505</a> </td></tr> <tr> <td>100-44-7</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0016.html">0016</a></td> <td><a href="/wiki/Benzyl_chloride" title="Benzyl chloride">Benzyl chloride</a> (used in chemical weapons)<sup id="cite_ref-6" class="reference"><a href="#cite_note-6"><span class="cite-bracket">[</span>6<span class="cite-bracket">]</span></a></sup></td> <td>51.8 mg/m<sup>3</sup></td> <td>10 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/100447.html">100447</a> </td></tr> <tr> <td>77-78-1</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0148.html">0148</a></td> <td><a href="/wiki/Dimethyl_sulfate" title="Dimethyl sulfate">Dimethyl sulfate</a> (used in chemical weapons)<sup id="cite_ref-7" class="reference"><a href="#cite_note-7"><span class="cite-bracket">[</span>7<span class="cite-bracket">]</span></a></sup></td> <td>36.1 mg/m<sup>3</sup></td> <td>7 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/77781.html">77781</a>, carcinogenic substance </td></tr> <tr> <td>76-06-2</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0750.html">0750</a></td> <td><a href="/wiki/Chloropicrin" title="Chloropicrin">Chloropicrin</a></td> <td>13.44 mg/m<sup>3</sup></td> <td>2 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/76062.html">76062</a> </td></tr> <tr> <td>75-44-5</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0007.html">0007</a></td> <td><a href="/wiki/Phosgene" title="Phosgene">Phosgene</a> (used in chemical weapons)</td> <td>8.1 mg/m<sup>3</sup></td> <td>2 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/75445.html">75445</a> </td></tr> <tr> <td>5714-22-7</td> <td>-</td> <td><a href="/wiki/Disulfur_decafluoride" title="Disulfur decafluoride">Sulfur pentafluoride</a></td> <td>~10.4 mg/m<sup>3</sup></td> <td>1 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/5714227.html">5714227</a> </td></tr> <tr> <td>505-60-2</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ipcsneng/neng0418.html">0418</a></td> <td><a href="/wiki/Sulfur_mustard" class="mw-redirect" title="Sulfur mustard">Sulfur mustard</a></td> <td>~4.7 mg/m<sup>3</sup></td> <td>0.7 ppm</td> <td><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/ershdb/EmergencyResponseCard_29750008.html">29750008</a> </td></tr> <tr> <td>77-81-6</td> <td>-</td> <td><a href="/wiki/Tabun_(nerve_agent)" title="Tabun (nerve agent)">Tabun</a></td> <td>~0.7 mg/m<sup>3</sup></td> <td>0.1 ppm</td> <td><a rel="nofollow" class="external text" href="http://www.osha.gov/SLTC/emergencypreparedness/cbrnmatrix/nerve.html">nerve</a> </td></tr> <tr> <td>77-81-6</td> <td>-</td> <td><a href="/wiki/Sarin" title="Sarin">Sarin</a></td> <td>~0.6 mg/m<sup>3</sup></td> <td>0.1 ppm</td> <td><a rel="nofollow" class="external text" href="http://www.osha.gov/SLTC/emergencypreparedness/cbrnmatrix/nerve.html">nerve</a> </td></tr> <tr> <td>96-64-0</td> <td>-</td> <td><a href="/wiki/Soman" title="Soman">Soman</a> (Zoman)</td> <td>~0.4 mg/m<sup>3</sup></td> <td>0.05 ppm</td> <td><a rel="nofollow" class="external text" href="http://www.osha.gov/SLTC/emergencypreparedness/cbrnmatrix/nerve.html">nerve</a> </td></tr> <tr> <td>329-99-7</td> <td>-</td> <td><a href="/wiki/Cyclosarin" title="Cyclosarin">Cyclosarin</a></td> <td>~0.4 mg/m<sup>3</sup></td> <td>0.05 ppm</td> <td><a rel="nofollow" class="external text" href="http://www.osha.gov/SLTC/emergencypreparedness/cbrnmatrix/nerve.html">nerve</a> </td></tr> <tr> <td>50782-69-9 51848-47-6 53800-40-1</td> <td>-</td> <td><a href="/wiki/VX_(nerve_agent)" title="VX (nerve agent)">VX</a></td> <td>~0.034 mg/m<sup>3</sup></td> <td>0.003 ppm</td> <td><a rel="nofollow" class="external text" href="http://www.osha.gov/SLTC/emergencypreparedness/cbrnmatrix/nerve.html">nerve</a> </td></tr></tbody></table> <div class="mw-heading mw-heading2"><h2 id="See_also">See also</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Immediately_dangerous_to_life_or_health&action=edit&section=3" title="Edit section: See also"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a href="/wiki/NIOSH_air_filtration_rating" title="NIOSH air filtration rating">NIOSH air filtration rating</a></li></ul> <div class="mw-heading mw-heading2"><h2 id="References">References</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Immediately_dangerous_to_life_or_health&action=edit&section=4" title="Edit section: References"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r1239543626">.mw-parser-output .reflist{margin-bottom:0.5em;list-style-type:decimal}@media screen{.mw-parser-output .reflist{font-size:90%}}.mw-parser-output .reflist .references{font-size:100%;margin-bottom:0;list-style-type:inherit}.mw-parser-output .reflist-columns-2{column-width:30em}.mw-parser-output .reflist-columns-3{column-width:25em}.mw-parser-output .reflist-columns{margin-top:0.3em}.mw-parser-output .reflist-columns ol{margin-top:0}.mw-parser-output .reflist-columns li{page-break-inside:avoid;break-inside:avoid-column}.mw-parser-output .reflist-upper-alpha{list-style-type:upper-alpha}.mw-parser-output .reflist-upper-roman{list-style-type:upper-roman}.mw-parser-output .reflist-lower-alpha{list-style-type:lower-alpha}.mw-parser-output .reflist-lower-greek{list-style-type:lower-greek}.mw-parser-output .reflist-lower-roman{list-style-type:lower-roman}</style><div class="reflist"> <div class="mw-references-wrap"><ol class="references"> <li id="cite_note-:0-1"><span class="mw-cite-backlink">^ <a href="#cite_ref-:0_1-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-:0_1-1"><sup><i><b>b</b></i></sup></a></span> <span class="reference-text"><style data-mw-deduplicate="TemplateStyles:r1238218222">.mw-parser-output cite.citation{font-style:inherit;word-wrap:break-word}.mw-parser-output .citation q{quotes:"\"""\"""'""'"}.mw-parser-output .citation:target{background-color:rgba(0,127,255,0.133)}.mw-parser-output .id-lock-free.id-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/6/65/Lock-green.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-limited.id-lock-limited a,.mw-parser-output .id-lock-registration.id-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/d/d6/Lock-gray-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-subscription.id-lock-subscription a{background:url("//upload.wikimedia.org/wikipedia/commons/a/aa/Lock-red-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .cs1-ws-icon a{background:url("//upload.wikimedia.org/wikipedia/commons/4/4c/Wikisource-logo.svg")right 0.1em center/12px no-repeat}body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-free a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-limited a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-registration a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-subscription a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .cs1-ws-icon a{background-size:contain;padding:0 1em 0 0}.mw-parser-output .cs1-code{color:inherit;background:inherit;border:none;padding:inherit}.mw-parser-output .cs1-hidden-error{display:none;color:var(--color-error,#d33)}.mw-parser-output .cs1-visible-error{color:var(--color-error,#d33)}.mw-parser-output .cs1-maint{display:none;color:#085;margin-left:0.3em}.mw-parser-output .cs1-kern-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right{padding-right:0.2em}.mw-parser-output .citation .mw-selflink{font-weight:inherit}@media screen{.mw-parser-output .cs1-format{font-size:95%}html.skin-theme-clientpref-night .mw-parser-output .cs1-maint{color:#18911f}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .cs1-maint{color:#18911f}}</style><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/idlhintr.html">"Immediately Dangerous To Life or Health (IDLH) Introduction"</a>. NIOSH. 4 December 2014. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20170918202058/https://www.cdc.gov/niosh/idlh/idlhintr.html">Archived</a> from the original on 18 September 2017.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Immediately+Dangerous+To+Life+or+Health+%28IDLH%29+Introduction&rft.pub=NIOSH&rft.date=2014-12-04&rft_id=https%3A%2F%2Fwww.cdc.gov%2Fniosh%2Fidlh%2Fidlhintr.html&rfr_id=info%3Asid%2Fen.wikipedia.org%3AImmediately+dangerous+to+life+or+health" class="Z3988"></span></span> </li> <li id="cite_note-2"><span class="mw-cite-backlink"><b><a href="#cite_ref-2">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222" /><cite class="citation web cs1"><a rel="nofollow" class="external text" href="http://www.osha.gov/pls/oshaweb/owadisp.show_document?p_id=12716&p_table=standards">"Occupational Safety and Health Standards"</a>. Occupational Safety & Health Administration. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20120709023232/http://www.osha.gov/pls/oshaweb/owadisp.show_document?p_id=12716&p_table=standards">Archived</a> from the original on 9 July 2012<span class="reference-accessdate">. Retrieved <span class="nowrap">7 July</span> 2012</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Occupational+Safety+and+Health+Standards&rft.pub=Occupational+Safety+%26+Health+Administration&rft_id=http%3A%2F%2Fwww.osha.gov%2Fpls%2Foshaweb%2Fowadisp.show_document%3Fp_id%3D12716%26p_table%3Dstandards&rfr_id=info%3Asid%2Fen.wikipedia.org%3AImmediately+dangerous+to+life+or+health" class="Z3988"></span></span> </li> <li id="cite_note-:1-3"><span class="mw-cite-backlink">^ <a href="#cite_ref-:1_3-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-:1_3-1"><sup><i><b>b</b></i></sup></a></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222" /><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/intridl4.html">"Chemical Listing and Documentation of Revised IDLH Values"</a>. <i>NIOSH Publications and Products</i>. Centers for Disease Control and Prevention. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20121117012820/http://www.cdc.gov/niosh/idlh/intridl4.html">Archived</a> from the original on 17 November 2012<span class="reference-accessdate">. Retrieved <span class="nowrap">7 July</span> 2012</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=NIOSH+Publications+and+Products&rft.atitle=Chemical+Listing+and+Documentation+of+Revised+IDLH+Values&rft_id=https%3A%2F%2Fwww.cdc.gov%2Fniosh%2Fidlh%2Fintridl4.html&rfr_id=info%3Asid%2Fen.wikipedia.org%3AImmediately+dangerous+to+life+or+health" class="Z3988"></span></span> </li> <li id="cite_note-Учебник-по-выбору-2004-4"><span class="mw-cite-backlink"><b><a href="#cite_ref-Учебник-по-выбору-2004_4-0">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222" /><cite id="CITEREFBollinger1987" class="citation book cs1">Bollinger, Nancy; et al. (1987). <a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/docs/2005-100/"><i>NIOSH Respirator Selecion Logic</i></a>. DHHS (NIOSH) Publication No. 87-108. Cincinnati, OH: National Institute for Occupational Safety and Health. p. 32. <a href="/wiki/Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<a rel="nofollow" class="external text" href="https://doi.org/10.26616%2FNIOSHPUB2005100">10.26616/NIOSHPUB2005100</a>. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20170623115207/https://www.cdc.gov/niosh/docs/2005-100/">Archived</a> from the original on 23 June 2017.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=book&rft.btitle=NIOSH+Respirator+Selecion+Logic&rft.place=Cincinnati%2C+OH&rft.series=DHHS+%28NIOSH%29+Publication+No.+87-108&rft.pages=32&rft.pub=National+Institute+for+Occupational+Safety+and+Health&rft.date=1987&rft_id=info%3Adoi%2F10.26616%2FNIOSHPUB2005100&rft.aulast=Bollinger&rft.aufirst=Nancy&rft_id=https%3A%2F%2Fwww.cdc.gov%2Fniosh%2Fdocs%2F2005-100%2F&rfr_id=info%3Asid%2Fen.wikipedia.org%3AImmediately+dangerous+to+life+or+health" class="Z3988"></span></span> </li> <li id="cite_note-5"><span class="mw-cite-backlink"><b><a href="#cite_ref-5">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222" /><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/npg/pgintrod.html">"CDC - NIOSH Pocket Guide to Chemical Hazards (NPG) Introduction"</a>. <i>www.cdc.gov</i>. 2 December 2019. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20171210102340/https://www.cdc.gov/niosh/npg/pgintrod.html">Archived</a> from the original on 10 December 2017.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=www.cdc.gov&rft.atitle=CDC+-+NIOSH+Pocket+Guide+to+Chemical+Hazards+%28NPG%29+Introduction&rft.date=2019-12-02&rft_id=https%3A%2F%2Fwww.cdc.gov%2Fniosh%2Fnpg%2Fpgintrod.html&rfr_id=info%3Asid%2Fen.wikipedia.org%3AImmediately+dangerous+to+life+or+health" class="Z3988"></span></span> </li> <li id="cite_note-6"><span class="mw-cite-backlink"><b><a href="#cite_ref-6">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222" /><cite class="citation web cs1"><a rel="nofollow" class="external text" href="http://www.epa.gov/ttn/atw/hlthef/benzylch.html">"Benzyl Chloride | Technology Transfer Network Air Toxics Web site | US EPA"</a>. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20140712085711/http://www.epa.gov/ttn/atw/hlthef/benzylch.html">Archived</a> from the original on 2014-07-12<span class="reference-accessdate">. Retrieved <span class="nowrap">2014-08-17</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Benzyl+Chloride+%26%23124%3B+Technology+Transfer+Network+Air+Toxics+Web+site+%26%23124%3B+US+EPA&rft_id=http%3A%2F%2Fwww.epa.gov%2Fttn%2Fatw%2Fhlthef%2Fbenzylch.html&rfr_id=info%3Asid%2Fen.wikipedia.org%3AImmediately+dangerous+to+life+or+health" class="Z3988"></span></span> </li> <li id="cite_note-7"><span class="mw-cite-backlink"><b><a href="#cite_ref-7">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222" /><cite class="citation web cs1"><a rel="nofollow" class="external text" href="http://www.epa.gov/ttn/atw/hlthef/di-sulfa.html">"Dimethyl Sulfate | Technology Transfer Network Air Toxics Web site | US EPA"</a>. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20120511021732/http://www.epa.gov/ttn/atw/hlthef/di-sulfa.html">Archived</a> from the original on 2012-05-11<span class="reference-accessdate">. Retrieved <span class="nowrap">2012-05-03</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Dimethyl+Sulfate+%26%23124%3B+Technology+Transfer+Network+Air+Toxics+Web+site+%26%23124%3B+US+EPA&rft_id=http%3A%2F%2Fwww.epa.gov%2Fttn%2Fatw%2Fhlthef%2Fdi-sulfa.html&rfr_id=info%3Asid%2Fen.wikipedia.org%3AImmediately+dangerous+to+life+or+health" class="Z3988"></span></span> </li> </ol></div></div> <div class="mw-heading mw-heading2"><h2 id="External_links">External links</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Immediately_dangerous_to_life_or_health&action=edit&section=5" title="Edit section: External links"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a rel="nofollow" class="external text" href="https://www.cdc.gov/niosh/idlh/">NIOSH IDLH site</a></li> <li><a rel="nofollow" class="external text" href="http://www.osha.gov/pls/oshaweb/owadisp.show_document?p_table=STANDARDS&p_id=12716">1910.134(b) Respiratory protection definitions</a></li></ul> <p><span class="noviewer" typeof="mw:File"><a href="/wiki/File:Commons-logo.svg" class="mw-file-description"><img alt="" src="//upload.wikimedia.org/wikipedia/en/thumb/4/4a/Commons-logo.svg/20px-Commons-logo.svg.png" decoding="async" width="12" height="16" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/4/4a/Commons-logo.svg/40px-Commons-logo.svg.png 2x" data-file-width="1024" data-file-height="1376" /></a></span> Related media at Wikimedia Commons: </p> <ul><li><a href="https://commons.wikimedia.org/wiki/File:NIOSH_1994_IDLH_doc.pdf" class="extiw" title="commons:File:NIOSH 1994 IDLH doc.pdf">Documentation for Immediately Dangerous to Life or Health Concentrations (IDLHs) (1994)</a></li></ul> <p><br /> </p> <div class="navbox-styles"><style data-mw-deduplicate="TemplateStyles:r1129693374">.mw-parser-output .hlist dl,.mw-parser-output .hlist ol,.mw-parser-output .hlist ul{margin:0;padding:0}.mw-parser-output .hlist dd,.mw-parser-output .hlist dt,.mw-parser-output .hlist li{margin:0;display:inline}.mw-parser-output .hlist.inline,.mw-parser-output .hlist.inline dl,.mw-parser-output .hlist.inline ol,.mw-parser-output .hlist.inline ul,.mw-parser-output .hlist dl dl,.mw-parser-output .hlist dl ol,.mw-parser-output .hlist dl ul,.mw-parser-output .hlist ol dl,.mw-parser-output .hlist ol ol,.mw-parser-output .hlist ol ul,.mw-parser-output .hlist ul dl,.mw-parser-output .hlist ul ol,.mw-parser-output .hlist ul ul{display:inline}.mw-parser-output .hlist .mw-empty-li{display:none}.mw-parser-output .hlist dt::after{content:": "}.mw-parser-output .hlist dd::after,.mw-parser-output .hlist li::after{content:" · ";font-weight:bold}.mw-parser-output .hlist dd:last-child::after,.mw-parser-output .hlist dt:last-child::after,.mw-parser-output .hlist li:last-child::after{content:none}.mw-parser-output .hlist dd dd:first-child::before,.mw-parser-output .hlist dd dt:first-child::before,.mw-parser-output .hlist dd li:first-child::before,.mw-parser-output .hlist dt dd:first-child::before,.mw-parser-output .hlist dt dt:first-child::before,.mw-parser-output .hlist dt li:first-child::before,.mw-parser-output .hlist li dd:first-child::before,.mw-parser-output .hlist li dt:first-child::before,.mw-parser-output .hlist li li:first-child::before{content:" (";font-weight:normal}.mw-parser-output .hlist dd dd:last-child::after,.mw-parser-output .hlist dd dt:last-child::after,.mw-parser-output .hlist dd li:last-child::after,.mw-parser-output .hlist dt dd:last-child::after,.mw-parser-output .hlist dt dt:last-child::after,.mw-parser-output .hlist dt li:last-child::after,.mw-parser-output .hlist li dd:last-child::after,.mw-parser-output .hlist li dt:last-child::after,.mw-parser-output .hlist li li:last-child::after{content:")";font-weight:normal}.mw-parser-output .hlist ol{counter-reset:listitem}.mw-parser-output .hlist ol>li{counter-increment:listitem}.mw-parser-output .hlist ol>li::before{content:" "counter(listitem)"\a0 "}.mw-parser-output .hlist dd ol>li:first-child::before,.mw-parser-output .hlist dt ol>li:first-child::before,.mw-parser-output .hlist li ol>li:first-child::before{content:" ("counter(listitem)"\a0 "}</style><style data-mw-deduplicate="TemplateStyles:r1236075235">.mw-parser-output .navbox{box-sizing:border-box;border:1px solid #a2a9b1;width:100%;clear:both;font-size:88%;text-align:center;padding:1px;margin:1em auto 0}.mw-parser-output .navbox .navbox{margin-top:0}.mw-parser-output .navbox+.navbox,.mw-parser-output .navbox+.navbox-styles+.navbox{margin-top:-1px}.mw-parser-output .navbox-inner,.mw-parser-output .navbox-subgroup{width:100%}.mw-parser-output .navbox-group,.mw-parser-output .navbox-title,.mw-parser-output .navbox-abovebelow{padding:0.25em 1em;line-height:1.5em;text-align:center}.mw-parser-output .navbox-group{white-space:nowrap;text-align:right}.mw-parser-output .navbox,.mw-parser-output .navbox-subgroup{background-color:#fdfdfd}.mw-parser-output .navbox-list{line-height:1.5em;border-color:#fdfdfd}.mw-parser-output .navbox-list-with-group{text-align:left;border-left-width:2px;border-left-style:solid}.mw-parser-output tr+tr>.navbox-abovebelow,.mw-parser-output tr+tr>.navbox-group,.mw-parser-output tr+tr>.navbox-image,.mw-parser-output tr+tr>.navbox-list{border-top:2px solid #fdfdfd}.mw-parser-output .navbox-title{background-color:#ccf}.mw-parser-output .navbox-abovebelow,.mw-parser-output .navbox-group,.mw-parser-output .navbox-subgroup .navbox-title{background-color:#ddf}.mw-parser-output .navbox-subgroup .navbox-group,.mw-parser-output .navbox-subgroup .navbox-abovebelow{background-color:#e6e6ff}.mw-parser-output .navbox-even{background-color:#f7f7f7}.mw-parser-output .navbox-odd{background-color:transparent}.mw-parser-output .navbox .hlist td dl,.mw-parser-output .navbox .hlist td ol,.mw-parser-output .navbox .hlist td ul,.mw-parser-output .navbox td.hlist dl,.mw-parser-output .navbox td.hlist ol,.mw-parser-output .navbox td.hlist ul{padding:0.125em 0}.mw-parser-output .navbox .navbar{display:block;font-size:100%}.mw-parser-output .navbox-title .navbar{float:left;text-align:left;margin-right:0.5em}body.skin--responsive .mw-parser-output .navbox-image img{max-width:none!important}@media print{body.ns-0 .mw-parser-output .navbox{display:none!important}}</style></div><div role="navigation" class="navbox" aria-labelledby="Occupational_safety_and_health784" style="padding:3px"><table class="nowraplinks mw-collapsible expanded navbox-inner" style="border-spacing:0;background:transparent;color:inherit"><tbody><tr><th scope="col" class="navbox-title" colspan="2"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374" /><style data-mw-deduplicate="TemplateStyles:r1239400231">.mw-parser-output .navbar{display:inline;font-size:88%;font-weight:normal}.mw-parser-output .navbar-collapse{float:left;text-align:left}.mw-parser-output .navbar-boxtext{word-spacing:0}.mw-parser-output .navbar ul{display:inline-block;white-space:nowrap;line-height:inherit}.mw-parser-output .navbar-brackets::before{margin-right:-0.125em;content:"[ "}.mw-parser-output .navbar-brackets::after{margin-left:-0.125em;content:" ]"}.mw-parser-output .navbar li{word-spacing:-0.125em}.mw-parser-output .navbar a>span,.mw-parser-output .navbar a>abbr{text-decoration:inherit}.mw-parser-output .navbar-mini abbr{font-variant:small-caps;border-bottom:none;text-decoration:none;cursor:inherit}.mw-parser-output .navbar-ct-full{font-size:114%;margin:0 7em}.mw-parser-output .navbar-ct-mini{font-size:114%;margin:0 4em}html.skin-theme-clientpref-night .mw-parser-output .navbar li a abbr{color:var(--color-base)!important}@media(prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .navbar li a abbr{color:var(--color-base)!important}}@media print{.mw-parser-output .navbar{display:none!important}}</style><div class="navbar plainlinks hlist navbar-mini"><ul><li class="nv-view"><a href="/wiki/Template:Occupational_safety_and_health" title="Template:Occupational safety and health"><abbr title="View this template">v</abbr></a></li><li class="nv-talk"><a href="/wiki/Template_talk:Occupational_safety_and_health" title="Template talk:Occupational safety and health"><abbr title="Discuss this template">t</abbr></a></li><li class="nv-edit"><a href="/wiki/Special:EditPage/Template:Occupational_safety_and_health" title="Special:EditPage/Template:Occupational safety and health"><abbr title="Edit this template">e</abbr></a></li></ul></div><div id="Occupational_safety_and_health784" style="font-size:114%;margin:0 4em"><a href="/wiki/Occupational_safety_and_health" title="Occupational safety and health">Occupational safety and health</a></div></th></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Occupational_disease" title="Occupational disease">Occupational <br />diseases</a><br />and <a href="/wiki/Occupational_injury" title="Occupational injury">injuries</a></th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Acrodynia" title="Acrodynia">Acrodynia</a></li> <li><a href="/wiki/Asbestosis" title="Asbestosis">Asbestosis</a></li> <li><a href="/wiki/Occupational_asthma" title="Occupational asthma">Asthma</a></li> <li><a href="/wiki/Barotrauma" title="Barotrauma">Barotrauma</a></li> <li><a href="/wiki/Berylliosis" title="Berylliosis">Berylliosis</a></li> <li><a href="/wiki/Brucellosis" title="Brucellosis">Brucellosis</a></li> <li><a href="/wiki/Occupational_burnout" title="Occupational burnout">Burnout</a></li> <li><a href="/wiki/Byssinosis" title="Byssinosis">Byssinosis ("brown lung")</a></li> <li><a href="/wiki/Occupational_cardiovascular_disease" title="Occupational cardiovascular disease">Cardiovascular</a></li> <li><a href="/wiki/Chalicosis" title="Chalicosis">Chalicosis</a></li> <li><a href="/wiki/Chronic_solvent-induced_encephalopathy" title="Chronic solvent-induced encephalopathy">Chronic solvent-induced encephalopathy</a></li> <li><a href="/wiki/Chronic_stress" title="Chronic stress">Chronic stress</a></li> <li><a href="/wiki/Chimney_sweeps%27_carcinoma" title="Chimney sweeps' carcinoma">Chimney sweeps' carcinoma</a></li> <li><a href="/wiki/Coalworker%27s_pneumoconiosis" class="mw-redirect" title="Coalworker's pneumoconiosis">Coalworker's pneumoconiosis ("black lung")</a></li> <li><a href="/wiki/Concussions_in_sport" title="Concussions in sport">Concussions in sport</a></li> <li><a href="/wiki/Decompression_sickness" title="Decompression sickness">Decompression sickness</a></li> <li><a href="/wiki/De_Quervain_syndrome" title="De Quervain syndrome">De Quervain syndrome</a></li> <li><a href="/wiki/Erethism" title="Erethism">Erethism</a></li> <li><a href="/wiki/Occupational_hazards_associated_with_exposure_to_human_nail_dust" class="mw-redirect" title="Occupational hazards associated with exposure to human nail dust">Exposure to human nail dust</a></li> <li><a href="/wiki/Farmer%27s_lung" title="Farmer's lung">Farmer's lung</a></li> <li><a href="/wiki/Fiddler%27s_neck" title="Fiddler's neck">Fiddler's neck</a></li> <li><a href="/wiki/Flock_worker%27s_lung" title="Flock worker's lung">Flock worker's lung</a></li> <li><a href="/wiki/Glassblower%27s_cataract" title="Glassblower's cataract">Glassblower's cataract</a></li> <li><a href="/wiki/Golfer%27s_elbow" title="Golfer's elbow">Golfer's elbow</a></li> <li><a href="/wiki/Hearing_loss" title="Hearing loss">Hearing loss</a></li> <li><a href="/wiki/Hospital-acquired_infection" title="Hospital-acquired infection">Hospital-acquired infection</a></li> <li><a href="/wiki/Indium_lung" title="Indium lung">Indium lung</a></li> <li><a href="/wiki/Laboratory_animal_allergy" title="Laboratory animal allergy">Laboratory animal allergy</a></li> <li><a href="/wiki/Lead_poisoning#Occupational_exposure" title="Lead poisoning">Lead poisoning</a></li> <li><a href="/wiki/Low_back_pain" title="Low back pain">Low back pain</a></li> <li><a href="/wiki/Mesothelioma" title="Mesothelioma">Mesothelioma</a></li> <li><a href="/wiki/Metal_fume_fever" title="Metal fume fever">Metal fume fever</a></li> <li><a href="/wiki/Mule_spinners%27_cancer" title="Mule spinners' cancer">Mule spinners' cancer</a></li> <li><a href="/wiki/Noise-induced_hearing_loss" title="Noise-induced hearing loss">Noise-induced hearing loss</a></li> <li><a href="/wiki/Phossy_jaw" title="Phossy jaw">Phossy jaw</a></li> <li><a href="/wiki/Pneumoconiosis" title="Pneumoconiosis">Pneumoconiosis</a></li> <li><a href="/wiki/Radium_jaw" title="Radium jaw">Radium jaw</a></li> <li><a href="/wiki/Repetitive_strain_injury" title="Repetitive strain injury">Repetitive strain injury</a></li> <li><a href="/wiki/Silicosis" title="Silicosis">Silicosis</a></li> <li><a href="/wiki/Silo-filler%27s_disease" class="mw-redirect" title="Silo-filler's disease">Silo-filler's disease</a></li> <li><a href="/wiki/Sports_injury" title="Sports injury">Sports injury</a></li> <li><a href="/wiki/Surfer%27s_ear" title="Surfer's ear">Surfer's ear</a></li> <li><a href="/wiki/Tennis_elbow" title="Tennis elbow">Tennis elbow</a></li> <li><a href="/wiki/Tinnitus" title="Tinnitus">Tinnitus</a></li> <li><a href="/wiki/Writer%27s_cramp" title="Writer's cramp">Writer's cramp</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Occupational_hygiene" title="Occupational hygiene">Occupational <br />hygiene</a></th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Occupational_hazard" title="Occupational hazard">Occupational hazard</a> <ul><li><a href="/wiki/Biological_hazard" title="Biological hazard">Biological hazard</a></li> <li><a href="/wiki/Chemical_hazard" title="Chemical hazard">Chemical hazard</a></li> <li><a href="/wiki/Physical_hazard" title="Physical hazard">Physical hazard</a></li> <li><a href="/wiki/Psychosocial_hazard" title="Psychosocial hazard">Psychosocial hazard</a></li></ul></li> <li><a href="/wiki/Occupational_stress" title="Occupational stress">Occupational stress</a></li> <li><a href="/wiki/Hierarchy_of_hazard_controls" title="Hierarchy of hazard controls">Hierarchy of hazard controls</a></li> <li><a href="/wiki/Prevention_through_design" title="Prevention through design">Prevention through design</a></li> <li><a href="/wiki/Exposure_assessment" title="Exposure assessment">Exposure assessment</a></li> <li><a href="/wiki/Occupational_exposure_limit" title="Occupational exposure limit">Occupational exposure limit</a></li> <li><a href="/wiki/Occupational_epidemiology" title="Occupational epidemiology">Occupational epidemiology</a></li> <li><a href="/wiki/Workplace_health_surveillance" title="Workplace health surveillance">Workplace health surveillance</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Professions</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Environmental_health" title="Environmental health">Environmental health</a></li> <li><a href="/wiki/Industrial_engineering" title="Industrial engineering">Industrial engineering</a></li> <li><a href="/wiki/Occupational_health_nursing" title="Occupational health nursing">Occupational health nursing</a></li> <li><a href="/wiki/Occupational_health_psychology" title="Occupational health psychology">Occupational health psychology</a></li> <li><a href="/wiki/Occupational_medicine" title="Occupational medicine">Occupational medicine</a></li> <li><a href="/wiki/Occupational_therapist" title="Occupational therapist">Occupational therapist</a></li> <li><a href="/wiki/Safety_engineering" title="Safety engineering">Safety engineering</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/List_of_occupational_safety_and_health_agencies" title="List of occupational safety and health agencies">Agencies</a> and <br />organizations</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:1%">International</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/European_Agency_for_Safety_and_Health_at_Work" title="European Agency for Safety and Health at Work">European Agency for Safety and Health at Work</a></li> <li><a href="/wiki/International_Labour_Organization" title="International Labour Organization">International Labour Organization</a></li> <li><a href="/wiki/World_Health_Organization" title="World Health Organization">World Health Organization</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">National</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Canadian_Centre_for_Occupational_Health_and_Safety" title="Canadian Centre for Occupational Health and Safety">Canadian Centre for Occupational Health and Safety</a> (Canada)</li> <li><a href="/wiki/Federal_Institute_for_Occupational_Safety_and_Health" title="Federal Institute for Occupational Safety and Health">Federal Institute for Occupational Safety and Health</a> (Germany)</li> <li><a href="/wiki/Istituto_nazionale_per_l%27assicurazione_contro_gli_infortuni_sul_lavoro" title="Istituto nazionale per l'assicurazione contro gli infortuni sul lavoro">Istituto nazionale per l'assicurazione contro gli infortuni sul lavoro</a> (Italy)</li> <li><a href="/wiki/National_Institute_for_Safety_and_Health_at_Work" title="National Institute for Safety and Health at Work">National Institute for Safety and Health at Work</a> (Spain)</li> <li><a href="/wiki/Health_and_Safety_Executive" title="Health and Safety Executive">Health and Safety Executive</a> (UK)</li> <li><a href="/wiki/Occupational_Safety_and_Health_Administration" title="Occupational Safety and Health Administration">Occupational Safety and Health Administration</a></li> <li><a href="/wiki/National_Institute_for_Occupational_Safety_and_Health" title="National Institute for Occupational Safety and Health">National Institute for Occupational Safety and Health</a> (US)</li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Standards</th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Accord_on_Fire_and_Building_Safety_in_Bangladesh" title="Accord on Fire and Building Safety in Bangladesh">Bangladesh Accord</a></li> <li><a href="/wiki/OHSAS_18001" title="OHSAS 18001">OHSAS 18001</a></li> <li><a href="/wiki/ISO_45001" title="ISO 45001">ISO 45001</a></li> <li><a href="/wiki/Occupational_Safety_and_Health_Convention,_1981" title="Occupational Safety and Health Convention, 1981">Occupational Safety and Health Convention, 1981</a></li> <li><a href="/wiki/Worker_Protection_Standard" title="Worker Protection Standard">Worker Protection Standard</a> (US)</li> <li><a href="/wiki/Working_Environment_(Air_Pollution,_Noise_and_Vibration)_Convention,_1977" title="Working Environment (Air Pollution, Noise and Vibration) Convention, 1977">Working Environment Convention, 1977</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Safety</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Checklist" title="Checklist">Checklist</a></li> <li><a href="/wiki/Code_of_practice" title="Code of practice">Code of practice</a></li> <li><a href="/wiki/Contingency_plan" title="Contingency plan">Contingency plan</a></li> <li><a href="/wiki/Diving_safety" title="Diving safety">Diving safety</a></li> <li><a href="/wiki/Emergency_procedure" title="Emergency procedure">Emergency procedure</a></li> <li><a href="/wiki/Emergency_evacuation" title="Emergency evacuation">Emergency evacuation</a></li> <li><a href="/wiki/Hazard" title="Hazard">Hazard</a></li> <li><a href="/wiki/Hierarchy_of_hazard_controls" title="Hierarchy of hazard controls">Hierarchy of hazard controls</a> <ul><li><a href="/wiki/Hazard_elimination" title="Hazard elimination">Hazard elimination</a></li> <li><a href="/wiki/Administrative_controls" title="Administrative controls">Administrative controls</a></li> <li><a href="/wiki/Engineering_controls" title="Engineering controls">Engineering controls</a></li> <li><a href="/wiki/Hazard_substitution" title="Hazard substitution">Hazard substitution</a></li> <li><a href="/wiki/Personal_protective_equipment" title="Personal protective equipment">Personal protective equipment</a></li></ul></li> <li><a href="/wiki/Job_safety_analysis" title="Job safety analysis">Job safety analysis</a></li> <li><a href="/wiki/Lockout-tagout" class="mw-redirect" title="Lockout-tagout">Lockout-tagout</a></li> <li><a href="/wiki/Permit_To_Work" class="mw-redirect" title="Permit To Work">Permit To Work</a></li> <li><a href="/wiki/Operations_manual" title="Operations manual">Operations manual</a></li> <li><a href="/wiki/Redundancy_(engineering)" title="Redundancy (engineering)">Redundancy (engineering)</a></li> <li><a href="/wiki/Risk_assessment" title="Risk assessment">Risk assessment</a></li> <li><a href="/wiki/Safety_culture" title="Safety culture">Safety culture</a></li> <li><a href="/wiki/Standard_operating_procedure" title="Standard operating procedure">Standard operating procedure</a></li> <li><a class="mw-selflink selflink">Immediately dangerous to life or health</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Legislation</th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Diving_regulations" title="Diving regulations">Diving regulations</a></li> <li><a href="/wiki/Occupational_Safety_and_Health_Act_(United_States)" title="Occupational Safety and Health Act (United States)">Occupational Safety and Health Act (United States)</a></li> <li><a href="/wiki/Potty_parity" title="Potty parity">Potty parity</a> (<a href="/wiki/Potty_parity_in_the_United_States" title="Potty parity in the United States">United States</a>)</li> <li><a href="/wiki/Right_to_sit" title="Right to sit">Right to sit</a> (<a href="/wiki/Right_to_sit_in_the_United_States" title="Right to sit in the United States">United States</a>)</li> <li><a href="/wiki/Workers%27_right_to_access_the_toilet" title="Workers' right to access the toilet">Workers' right to access the toilet</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">See also</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Aerosol" title="Aerosol">Aerosol</a></li> <li><a href="/wiki/Break_(work)" title="Break (work)">Break</a></li> <li><a href="/wiki/Break_room" title="Break room">Break room</a></li> <li><a href="/wiki/Drug_policy" title="Drug policy">Drug policy</a></li> <li><a href="/wiki/Effects_of_overtime" title="Effects of overtime">Effects of overtime</a></li> <li><a href="/wiki/Environment,_health_and_safety" title="Environment, health and safety">Environment, health and safety</a></li> <li><a href="/wiki/Environmental_toxicology" title="Environmental toxicology">Environmental toxicology</a></li> <li><a href="/wiki/Ergonomics" title="Ergonomics">Ergonomics</a></li> <li><a href="/wiki/Fire_Fighter_Fatality_Investigation_and_Prevention_Program" title="Fire Fighter Fatality Investigation and Prevention Program">Fire Fighter Fatality Investigation and Prevention Program</a></li> <li><a href="/wiki/Hawks_Nest_Tunnel_disaster" title="Hawks Nest Tunnel disaster">Hawks Nest Tunnel disaster</a></li> <li><a href="/wiki/Health_physics" title="Health physics">Health physics</a></li> <li><a href="/wiki/Hostile_work_environment" title="Hostile work environment">Hostile work environment</a></li> <li><a href="/wiki/Indoor_air_quality" title="Indoor air quality">Indoor air quality</a></li> <li><a href="/wiki/International_Chemical_Safety_Card" class="mw-redirect" title="International Chemical Safety Card">International Chemical Safety Card</a></li> <li><a href="/wiki/Job_strain" title="Job strain">Job strain</a></li> <li><a href="/wiki/National_Day_of_Mourning_(Canadian_observance)" title="National Day of Mourning (Canadian observance)">National Day of Mourning (Canada)</a></li> <li><a href="/wiki/NIOSH_air_filtration_rating" title="NIOSH air filtration rating">NIOSH air filtration rating</a></li> <li><a href="/wiki/Overwork" title="Overwork">Overwork</a></li> <li><a href="/wiki/Process_safety" title="Process safety">Process safety</a></li> <li><a href="/wiki/Public_health" title="Public health">Public health</a></li> <li><a href="/wiki/Quality_of_working_life" title="Quality of working life">Quality of working life</a></li> <li><a href="/wiki/Risk_management" title="Risk management">Risk management</a></li> <li><a href="/wiki/Safety_data_sheet" title="Safety data sheet">Safety data sheet</a></li> <li><a href="/wiki/Source_control_(respiratory_disease)" title="Source control (respiratory disease)">Source control</a></li> <li><a href="/wiki/Toxic_tort" title="Toxic tort">Toxic tort</a></li> <li><a href="/wiki/Toxic_workplace" title="Toxic workplace">Toxic workplace</a></li> <li><a href="/wiki/Workers%27_compensation" title="Workers' compensation">Workers' compensation</a></li> <li><a href="/wiki/Workplace_hazard_controls_for_COVID-19" title="Workplace hazard controls for COVID-19">Workplace hazard controls for COVID-19</a></li> <li><a href="/wiki/Workplace_health_promotion" title="Workplace health promotion">Workplace health promotion</a></li></ul> </div></td></tr><tr><td class="navbox-abovebelow hlist" colspan="2"><div> <ul><li><span class="noviewer" typeof="mw:File"><span title="Category"><img alt="" src="//upload.wikimedia.org/wikipedia/en/thumb/9/96/Symbol_category_class.svg/20px-Symbol_category_class.svg.png" decoding="async" width="16" height="16" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/9/96/Symbol_category_class.svg/40px-Symbol_category_class.svg.png 1.5x" data-file-width="180" data-file-height="185" /></span></span> <b><a href="/wiki/Category:Occupational_safety_and_health" title="Category:Occupational safety and health">Category</a></b> <ul><li><a href="/wiki/Category:Occupational_diseases" title="Category:Occupational diseases">Occupational diseases</a></li> <li><a href="/wiki/Category:Occupational_safety_and_health_journals" title="Category:Occupational safety and health journals">Journals</a></li> <li><a href="/wiki/Category:Occupational_safety_and_health_organizations" title="Category:Occupational safety and health organizations">Organizations</a></li></ul></li> <li><span class="noviewer" typeof="mw:File"><span title="Commons page"><img alt="" src="//upload.wikimedia.org/wikipedia/en/thumb/4/4a/Commons-logo.svg/20px-Commons-logo.svg.png" decoding="async" width="12" height="16" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/4/4a/Commons-logo.svg/40px-Commons-logo.svg.png 2x" data-file-width="1024" data-file-height="1376" /></span></span> <b><a href="https://commons.wikimedia.org/wiki/Category:Occupational_safety_and_health" class="extiw" title="commons:Category:Occupational safety and health">Commons</a></b></li></ul> </div></td></tr></tbody></table></div>    </div><noscript><img src="https://auth.wikimedia.org/loginwiki/wiki/Special:CentralAutoLogin/start?useformat=desktop&type=1x1&usesul3=1" alt="" width="1" height="1" style="border: none; position: absolute;"></noscript> <div class="printfooter" data-nosnippet="">Retrieved from "<a dir="ltr" href="https://en.wikipedia.org/w/index.php?title=Immediately_dangerous_to_life_or_health&oldid=1271712210">https://en.wikipedia.org/w/index.php?title=Immediately_dangerous_to_life_or_health&oldid=1271712210</a>"</div></div> <div id="catlinks" class="catlinks" data-mw="interface"><div id="mw-normal-catlinks" class="mw-normal-catlinks"><a href="/wiki/Help:Category" title="Help:Category">Categories</a>: <ul><li><a href="/wiki/Category:Chemical_safety" title="Category:Chemical safety">Chemical safety</a></li><li><a href="/wiki/Category:Firefighting_in_the_United_States" title="Category:Firefighting in the United States">Firefighting in the United States</a></li><li><a href="/wiki/Category:Occupational_Safety_and_Health_Administration" title="Category:Occupational Safety and Health Administration">Occupational Safety and Health Administration</a></li><li><a href="/wiki/Category:National_Institute_for_Occupational_Safety_and_Health" title="Category:National Institute for Occupational Safety and Health">National Institute for Occupational Safety and Health</a></li><li><a href="/wiki/Category:Occupational_safety_and_health" title="Category:Occupational safety and health">Occupational safety and health</a></li></ul></div><div id="mw-hidden-catlinks" class="mw-hidden-catlinks mw-hidden-cats-hidden">Hidden categories: <ul><li><a href="/wiki/Category:Articles_with_short_description" title="Category:Articles with short description">Articles with short description</a></li><li><a href="/wiki/Category:Short_description_matches_Wikidata" title="Category:Short description matches Wikidata">Short description matches Wikidata</a></li><li><a href="/wiki/Category:Webarchive_template_wayback_links" title="Category:Webarchive template wayback links">Webarchive template wayback links</a></li><li><a href="/wiki/Category:All_articles_with_dead_external_links" title="Category:All articles with dead external links">All articles with dead external links</a></li><li><a href="/wiki/Category:Articles_with_dead_external_links_from_December_2017" title="Category:Articles with dead external links from December 2017">Articles with dead external links from December 2017</a></li><li><a href="/wiki/Category:Articles_with_permanently_dead_external_links" title="Category:Articles with permanently dead external links">Articles with permanently dead external links</a></li></ul></div></div> </div> </main> </div> <div class="mw-footer-container"> <footer id="footer" class="mw-footer" > <ul id="footer-info"> <li id="footer-info-lastmod"> This page was last edited on 25 January 2025, at 09:17<span class="anonymous-show"> (UTC)</span>.</li> <li id="footer-info-copyright">Text is available under the <a href="/wiki/Wikipedia:Text_of_the_Creative_Commons_Attribution-ShareAlike_4.0_International_License" title="Wikipedia:Text of the Creative Commons Attribution-ShareAlike 4.0 International License">Creative Commons Attribution-ShareAlike 4.0 License</a>; additional terms may apply. By using this site, you agree to the <a href="https://foundation.wikimedia.org/wiki/Special:MyLanguage/Policy:Terms_of_Use" class="extiw" title="foundation:Special:MyLanguage/Policy:Terms of Use">Terms of Use</a> and <a href="https://foundation.wikimedia.org/wiki/Special:MyLanguage/Policy:Privacy_policy" class="extiw" title="foundation:Special:MyLanguage/Policy:Privacy policy">Privacy Policy</a>. Wikipedia® is a registered trademark of the <a rel="nofollow" class="external text" href="https://wikimediafoundation.org/">Wikimedia Foundation, Inc.</a>, a non-profit organization.</li> </ul> <ul id="footer-places"> <li id="footer-places-privacy"><a href="https://foundation.wikimedia.org/wiki/Special:MyLanguage/Policy:Privacy_policy">Privacy policy</a></li> <li id="footer-places-about"><a href="/wiki/Wikipedia:About">About Wikipedia</a></li> <li id="footer-places-disclaimers"><a href="/wiki/Wikipedia:General_disclaimer">Disclaimers</a></li> <li id="footer-places-contact"><a href="//en.wikipedia.org/wiki/Wikipedia:Contact_us">Contact Wikipedia</a></li> <li id="footer-places-wm-codeofconduct"><a href="https://foundation.wikimedia.org/wiki/Special:MyLanguage/Policy:Universal_Code_of_Conduct">Code of Conduct</a></li> <li id="footer-places-developers"><a href="https://developer.wikimedia.org">Developers</a></li> <li id="footer-places-statslink"><a href="https://stats.wikimedia.org/#/en.wikipedia.org">Statistics</a></li> <li id="footer-places-cookiestatement"><a href="https://foundation.wikimedia.org/wiki/Special:MyLanguage/Policy:Cookie_statement">Cookie statement</a></li> <li id="footer-places-mobileview"><a href="//en.m.wikipedia.org/w/index.php?title=Immediately_dangerous_to_life_or_health&mobileaction=toggle_view_mobile" class="noprint stopMobileRedirectToggle">Mobile view</a></li> </ul> <ul id="footer-icons" class="noprint"> <li id="footer-copyrightico"><a href="https://www.wikimedia.org/" class="cdx-button cdx-button--fake-button cdx-button--size-large cdx-button--fake-button--enabled"><picture><source media="(min-width: 500px)" srcset="/static/images/footer/wikimedia-button.svg" width="84" height="29"><img src="/static/images/footer/wikimedia.svg" width="25" height="25" alt="Wikimedia Foundation" lang="en" loading="lazy"></picture></a></li> <li id="footer-poweredbyico"><a href="https://www.mediawiki.org/" class="cdx-button cdx-button--fake-button cdx-button--size-large cdx-button--fake-button--enabled"><picture><source media="(min-width: 500px)" srcset="/w/resources/assets/poweredby_mediawiki.svg" width="88" height="31"><img src="/w/resources/assets/mediawiki_compact.svg" alt="Powered by MediaWiki" lang="en" width="25" height="25" loading="lazy"></picture></a></li> </ul> </footer> </div> </div> </div> <div class="vector-header-container vector-sticky-header-container"> <div id="vector-sticky-header" class="vector-sticky-header"> <div class="vector-sticky-header-start"> <div class="vector-sticky-header-icon-start vector-button-flush-left vector-button-flush-right" aria-hidden="true"> <button class="cdx-button cdx-button--weight-quiet cdx-button--icon-only vector-sticky-header-search-toggle" tabindex="-1" data-event-name="ui.vector-sticky-search-form.icon"><span class="vector-icon mw-ui-icon-search mw-ui-icon-wikimedia-search"></span> <span>Search</span> </button> </div> <div role="search" class="vector-search-box-vue vector-search-box-show-thumbnail vector-search-box"> <div class="vector-typeahead-search-container"> <div class="cdx-typeahead-search cdx-typeahead-search--show-thumbnail"> <form action="/w/index.php" id="vector-sticky-search-form" class="cdx-search-input cdx-search-input--has-end-button"> <div class="cdx-search-input__input-wrapper" data-search-loc="header-moved"> <div class="cdx-text-input cdx-text-input--has-start-icon"> <input class="cdx-text-input__input" type="search" name="search" placeholder="Search Wikipedia"> <span class="cdx-text-input__icon cdx-text-input__start-icon"></span> </div> <input type="hidden" name="title" value="Special:Search"> </div> <button class="cdx-button cdx-search-input__end-button">Search</button> </form> </div> </div> </div> <div class="vector-sticky-header-context-bar"> <nav aria-label="Contents" class="vector-toc-landmark"> <div id="vector-sticky-header-toc" class="vector-dropdown mw-portlet mw-portlet-sticky-header-toc vector-sticky-header-toc vector-button-flush-left" > <input type="checkbox" id="vector-sticky-header-toc-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-sticky-header-toc" class="vector-dropdown-checkbox " aria-label="Toggle the table of contents" > <label id="vector-sticky-header-toc-label" for="vector-sticky-header-toc-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-listBullet mw-ui-icon-wikimedia-listBullet"></span> <span class="vector-dropdown-label-text">Toggle the table of contents</span> </label> <div class="vector-dropdown-content"> <div id="vector-sticky-header-toc-unpinned-container" class="vector-unpinned-container"> </div> </div> </div> </nav> <div class="vector-sticky-header-context-bar-primary" aria-hidden="true" ><span class="mw-page-title-main">Immediately dangerous to life or health</span></div> </div> </div> <div class="vector-sticky-header-end" aria-hidden="true"> <div class="vector-sticky-header-icons"> <a href="#" class="cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only" id="ca-talk-sticky-header" tabindex="-1" data-event-name="talk-sticky-header"><span class="vector-icon mw-ui-icon-speechBubbles mw-ui-icon-wikimedia-speechBubbles"></span> <span></span> </a> <a href="#" class="cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only" id="ca-subject-sticky-header" tabindex="-1" data-event-name="subject-sticky-header"><span class="vector-icon mw-ui-icon-article mw-ui-icon-wikimedia-article"></span> <span></span> </a> <a href="#" class="cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only" id="ca-history-sticky-header" tabindex="-1" data-event-name="history-sticky-header"><span class="vector-icon mw-ui-icon-wikimedia-history mw-ui-icon-wikimedia-wikimedia-history"></span> <span></span> </a> <a href="#" class="cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only mw-watchlink" id="ca-watchstar-sticky-header" tabindex="-1" data-event-name="watch-sticky-header"><span class="vector-icon mw-ui-icon-wikimedia-star mw-ui-icon-wikimedia-wikimedia-star"></span> <span></span> </a> <a href="#" class="cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only" id="ca-edit-sticky-header" tabindex="-1" data-event-name="wikitext-edit-sticky-header"><span class="vector-icon mw-ui-icon-wikimedia-wikiText mw-ui-icon-wikimedia-wikimedia-wikiText"></span> <span></span> </a> <a href="#" class="cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only" id="ca-ve-edit-sticky-header" tabindex="-1" data-event-name="ve-edit-sticky-header"><span class="vector-icon mw-ui-icon-wikimedia-edit mw-ui-icon-wikimedia-wikimedia-edit"></span> <span></span> </a> <a href="#" class="cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only" id="ca-viewsource-sticky-header" tabindex="-1" data-event-name="ve-edit-protected-sticky-header"><span class="vector-icon mw-ui-icon-wikimedia-editLock mw-ui-icon-wikimedia-wikimedia-editLock"></span> <span></span> </a> </div> <div class="vector-sticky-header-buttons"> <button class="cdx-button cdx-button--weight-quiet mw-interlanguage-selector" id="p-lang-btn-sticky-header" tabindex="-1" data-event-name="ui.dropdown-p-lang-btn-sticky-header"><span class="vector-icon mw-ui-icon-wikimedia-language mw-ui-icon-wikimedia-wikimedia-language"></span> <span>11 languages</span> </button> <a href="#" class="cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--action-progressive" id="ca-addsection-sticky-header" tabindex="-1" data-event-name="addsection-sticky-header"><span class="vector-icon mw-ui-icon-speechBubbleAdd-progressive mw-ui-icon-wikimedia-speechBubbleAdd-progressive"></span> <span>Add topic</span> </a> </div> <div class="vector-sticky-header-icon-end"> <div class="vector-user-links"> </div> </div> </div> </div> </div> <div class="mw-portlet mw-portlet-dock-bottom emptyPortlet" id="p-dock-bottom"> <ul> </ul> </div> <script>(RLQ=window.RLQ||[]).push(function(){mw.config.set({"wgHostname":"mw-web.codfw.main-7d9fdf6679-xz6tw","wgBackendResponseTime":220,"wgPageParseReport":{"limitreport":{"cputime":"0.613","walltime":"0.759","ppvisitednodes":{"value":1340,"limit":1000000},"postexpandincludesize":{"value":46630,"limit":2097152},"templateargumentsize":{"value":2043,"limit":2097152},"expansiondepth":{"value":15,"limit":100},"expensivefunctioncount":{"value":2,"limit":500},"unstrip-depth":{"value":1,"limit":20},"unstrip-size":{"value":34354,"limit":5000000},"entityaccesscount":{"value":0,"limit":400},"timingprofile":["100.00% 420.160 1 -total"," 37.40% 157.123 1 Template:Reflist"," 31.32% 131.578 6 Template:Cite_web"," 25.22% 105.983 1 Template:Occupational_safety_and_health"," 24.79% 104.174 2 Template:Navbox"," 21.86% 91.842 1 Template:Short_description"," 12.72% 53.450 2 Template:Pagetype"," 9.48% 39.836 1 Template:Dead_link"," 8.20% 34.469 1 Template:Fix"," 6.29% 26.432 5 Template:Main_other"]},"scribunto":{"limitreport-timeusage":{"value":"0.249","limit":"10.000"},"limitreport-memusage":{"value":5602322,"limit":52428800}},"cachereport":{"origin":"mw-web.eqiad.main-66cb474b5d-krm4z","timestamp":"20250407173956","ttl":2592000,"transientcontent":false}}});});</script> <script type="application/ld+json">{"@context":"https:\/\/schema.org","@type":"Article","name":"Immediately dangerous to life or health","url":"https:\/\/en.wikipedia.org\/wiki\/Immediately_dangerous_to_life_or_health","sameAs":"http:\/\/www.wikidata.org\/entity\/Q682341","mainEntity":"http:\/\/www.wikidata.org\/entity\/Q682341","author":{"@type":"Organization","name":"Contributors to Wikimedia projects"},"publisher":{"@type":"Organization","name":"Wikimedia Foundation, Inc.","logo":{"@type":"ImageObject","url":"https:\/\/www.wikimedia.org\/static\/images\/wmf-hor-googpub.png"}},"datePublished":"2005-01-06T06:28:11Z","dateModified":"2025-01-25T09:17:02Z","image":"https:\/\/upload.wikimedia.org\/wikipedia\/commons\/1\/15\/%D0%9A%D0%BE%D0%BC%D0%B1%D0%B8%D0%BD%D0%B8%D1%80%D0%BE%D0%B2%D0%B0%D0%BD%D0%BD%D1%8B%D0%B9_%D0%A1%D0%98%D0%97%D0%9E%D0%94_%D0%A8%D0%A0_%D0%B8_%D0%90%D0%94%D0%90.jpg","headline":"Exposure to dangerous levels of airborne contaminants"}</script> </body> </html>