CCOHS: Canadian Centre for Occupational Health and Safety

<!DOCTYPE html> <html class="no-js" lang="en"> <head> <meta charset="utf-8" /> <title> CCOHS: Canadian Centre for Occupational Health and Safety </title> <meta content="width=device-width, initial-scale=1" name="viewport" /> <meta property="og:title" content="CCOHS: Canadian Centre for Occupational Health and Safety" /> <meta property="og:type" content="website" /> <meta property="og:url" content="https://www.ccohs.ca/help" /> <meta property="og:image" content="https://www.ccohs.ca/images/twitter_cards/twitter_card.png" /> <meta property="og:description" content="The Canadian Centre for Occupational Health and Safety (CCOHS) promotes a safe and healthy working environment by providing occupational health and safety information and advice." /> <meta name="twitter:card" content="summary_large_image" /> <meta name="twitter:site" content="@ccohs" /> <meta name="twitter:title" content="CCOHS: Canadian Centre for Occupational Health and Safety" /> <meta name="twitter:description" content="The Canadian Centre for Occupational Health and Safety (CCOHS) promotes a safe and healthy working environment by providing occupational health and safety information and advice." /> <meta name="twitter:image" content="https://www.ccohs.ca/images/twitter_cards/twitter_card.png" /> <meta name="description" content="The Canadian Centre for Occupational Health and Safety (CCOHS) promotes a safe and healthy working environment by providing occupational health and safety information and advice." /> <meta name="keywords" content="CCOHS, CCHST, OSH, OH&S, EHS, health and safety, health, safety, workplace, occupational, environment, ergonomics, RMI, RSI, chemical safety, chemical hazards, WHMIS, WHMIS II, MSDS, Material Safety Data Sheet, FTSS, Fiches techniques sur la sécurité des substances, injury, CAS, health and safety training, health and safety guide, environmental health and safety legislation" /> <meta name="dcterms.title" content="CCOHS: Canadian Centre for Occupational Health and Safety" /> <meta name="dcterms.creator" content="Government of Canada, Canadian Centre for Occupational Health and Safety" /> <meta name="dcterms.issued" title="W3CDTF" content="2024-01-15" /> <meta name="dcterms.modified" title="W3CDTF" content="2024-01-15" /> <meta name="dcterms.language" title="ISO639-2" content="eng" /> <link href="/assets/favicon.ico" rel="icon" type="image/x-icon" /> <link rel="stylesheet" href="/wet-css/wet-boew.min.css" /> <link rel="stylesheet" href="/wet-css/theme_ccohs.min.css" /> <script type="text/JavaScript"> var section_name = ""; var toggleLanguage = 'en'; </script> <script src="/wet-js/ccohs_general.js"></script> <noscript> <link rel="stylesheet" href="/wet-css/noscript.min.css" /> </noscript> <link rel="stylesheet" href="/wet-css/ccohs_general.min.css?20200925" /> <link rel="stylesheet" href="/wet-css/ccohs_general_ie.css" /> <link rel="stylesheet" href="/wet-css/ccohs_general_webkit.css" /> <style type="text/css"> @media print { a[href^="/"]:after { content: " (http://www.ccohs.ca" attr(href) ") "; } a[href^="/"].hidden-print-url:after { content: ""; } } /* WET-WEOB overrides START */ /* Language link mobile view STARTS */ #mb-pnl .lng-ofr a { color: currentColor; text-decoration: none; } /* Language link mobile view ENDS */ /*overiding WET's styles for main bg image and bg colour */ body { background-image: none !important; } #wb-bnr { background-color: #fff !important; background-image: none !important; } #wb-srch .form-control, .srch-pnl .form-control { width: auto; } /* WET-WEOB overrides END */ /* 40y anniversary logo's styles */ .ccohs-cchst-logo { width: 100%; height: 94px; padding-left: .4em; } @media (min-width: 510px) { .ccohs-cchst-logo { min-width: 496px; } } </style> </head> <body vocab="http://schema.org/" typeof="WebPage"> <span typeof="Organization"> <meta property="legalName" content="Canadian_Centre_for_Occupational_Health_and_Safety"> </span> <ul id="wb-tphp"> <li class="wb-slc"><a class="wb-sl" href="#wb-cont">Skip to main content</a></li> <li class="wb-slc visible-md visible-lg"><a class="wb-sl" href="#wb-info">Skip to site information</a></li> </ul> <header role="banner"> <div id="wb-bnr"> <div id="wb-bar"> <div class="container"> <div class="row"> <object id="gcwu-sig" type="image/svg+xml" tabindex="-1" role="img" data="/assets/sig-en.svg" aria-label="Government of Canada"></object> <ul id="gc-bar" class="list-inline"> <li><a href="http://www.canada.ca/en/index.html" rel="external">Canada.ca</a></li> <li><a href="http://www.canada.ca/en/services/index.html" rel="external">Services</a></li> <li><a href="http://www.canada.ca/en/gov/dept/index.html" rel="external">Departments</a> </li> <li id="wb-lng"> <h2 class="sr-only">Language selection</h2> <ul class="list-inline"> <li><a lang="fr" href="https://www.cchst.ca/help">Français</a></li> </ul> </li> </ul> <section class="wb-mb-links col-xs-12 visible-sm visible-xs" id="wb-glb-mn"> <h2>Menu</h2> <ul class="pnl-btn list-inline text-right"> <li> <a href="#mb-pnl" title="Menu" aria-controls="mb-pnl" class="overlay-lnk btn btn-xs btn-default" role="button"> <span class="glyphicon glyphicon-th-list"> <span class="wb-inv">Menu</span> </span> </a> </li> </ul> <div id="mb-pnl"></div> </section> </div> </div> </div> <div class="container"> <div class="row wb-frmvld"> <div id="wb-sttl" class="col-md-6 col-md-7 col-lg-6"> <a href="/" class="top-ccohs-logo"> <img src="/images/ccohs-cchst-logo.jpg" alt="Canadian Centre for Occupational Health and Safety" width="372" height="88" class="img-responsive"> </a> </div>  <style> .maintainance-message { background: #d8eeca; border-color: #278400; } </style> <div class="maintainance-message col-xs-12 col-sm-5 col-md-6 mrgn-lft-xs pddn-md mrgn-tp-lg mrgn-bttm-lg" style="display:none"> <p class="small mrgn-bttm-sm"><strong>Scheduled maintenance - Thursday, July 12 at 5:00 PM EDT</strong></p> <p class="small mrgn-bttm-0">We expect this update to take about an hour. Access to this website will be unavailable during this time.</p> </div>  <section id="wb-srch" class="visible-md visible-lg"> <h2>Search</h2> <form action="/search/" method="get" role="search" class="form-inline ccohs-search-form" enctype="x-www-form-encoded"> <div class="ccohs-search-form__wrapper"> <label for="wb-srch-q">Search website</label> <input id="wb-srch-q" class="form-control" name="q" type="search" value="" size="27" maxlength="150" required /> <button type="submit" id="wb-srch-sub" class="btn btn-default" name="wb-srch-sub">Search</button> </div> </form> </section> </div> </div> </div> <nav role="navigation" id="wb-sm" data-trgt="mb-pnl" class="wb-menu visible-md visible-lg" typeof="SiteNavigationElement"> <div class="container nvbar"> <h2>Site menu</h2> <div class="row"> <ul class="outer-wrapper list-inline menu" role="menubar"> <li role="none"> <a href="#legislation" class="item">Legislation</a> <ul class="sm list-unstyled" id="project" role="menu"> <li role="none"><a href="/topics/legislation/acts">Acts and Regulations</a></li> <li role="none"><a href="/topics/legislation/duediligence">Due Diligence</a></li> <li role="none"><a href="/topics/legislation/programs">Health and Safety Programs</a></li> <li role="none"><a href="/topics/legislation/irs">Internal Responsibility System</a></li> <li role="none"><a href="/topics/legislation/rights">Rights and Responsibilities</a></li> <li role="none"><a href="/topics/legislation/standards">Standards</a></li> <li role="none"><a href="/topics/legislation/WHMIS">WHMIS/GHS/(M)SDS</a></li> <li role="none"><a href="/topics/legislation" class="mainLink">Legislation – Main Page</a></li> </ul> </li> <li role="none"> <a href="#hazards" class="item">Hazards</a> <ul class="sm list-unstyled" id="implement" role="menu"> <li role="none"><a href="/topics/hazards/chemical">Chemical</a></li> <li role="none"><a href="/topics/hazards/ergonomic">Ergonomic</a></li> <li role="none"><a href="/topics/hazards/health">Health</a></li> <li role="none"><a href="/topics/hazards/physical">Physical</a></li> <li role="none"><a href="/topics/hazards/psychosocial">Psychosocial</a></li> <li role="none"><a href="/topics/hazards/safety">Safety</a></li> <li role="none"><a href="/topics/hazards/workplace">Workplace</a></li> <li role="none"><a href="/topics/hazards" class="mainLink">Hazards – Main Page</a></li> </ul> </li> <li role="none"> <a href="#workers" class="item">Workers</a> <ul class="sm list-unstyled" role="menu"> <li role="none"><a href="/topics/workers/aging">Aging Workers</a></li> <li role="none"><a href="/topics/workers/vulnerable">Vulnerable Workers</a></li> <li role="none"><a href="/topics/workers/youngnew">Young/New Workers</a></li> <li role="none"><a href="/topics/workers" class="mainLink">Workers – Main Page</a></li> </ul> </li> <li role="none"> <a href="#healthwellness" class="item">Health and Wellness</a> <ul class="sm list-unstyled" role="menu"> <li role="none"><a href="/topics/wellness/impairment">Impairment</a></li> <li role="none"><a href="/topics/wellness/mentalhealth">Mental Health</a></li> <li role="none"><a href="/topics/wellness/promotion">Promotion</a></li> <li role="none"><a href="/topics/wellness/program">Program Development</a></li> <li role="none"><a href="/topics/wellness/stress">Stress</a></li> <li role="none"><a href="/topics/wellness/violence">Violence/Bullying</a></li> <li role="none"><a href="/topics/wellness/worklife">Work-Life Balance</a></li> <li role="none"><a href="/topics/wellness" class="mainLink">Health and Wellness - Main Page</a></li> </ul> </li> <li role="none"> <a href="#programsmgmtsystems" class="item">Programs</a> <ul class="sm list-unstyled" role="menu"> <li role="none"><a href="/topics/programs/programs">Programs</a></li> <li role="none"><a href="/topics/programs/management">Management Systems</a></li> <li role="none"><a href="/topics/programs" class="mainLink">Programs – Main Page</a></li> </ul> </li> <li class="margin-inline-start-auto" role="none"> <a id="iamlookingfor" href="#iamlookingfor" class="item">I am looking for...</a> <ul class="sm list-unstyled" role="menu"> <li role="none"><a href="/products/apps_and_software" title="Apps and Software">Apps and Software</a></li> <li role="none"><a href="/products/business-portal" title="Business Safety Portal">Business Safety Portal</a></li> <li role="none"><a href="/products/canmanage" title="CANManage - SDS Management">CANManage - SDS Management</a> </li> <li role="none"><a href="/products/courses" title="Courses/e-Learning">Courses - Online</a></li> <li role="none"><a href="/products/databases" title="Databases">Databases</a></li>  <li role="none"><a href="/products/podcasts" title="Podcasts">Podcasts</a></li> <li role="none"><a href="/products/posters" title="Posters and Infographics">Posters and Infographics</a></li> <li role="none"><a href="/products/boutique" title="Promotional Tools">Promotion Tools</a></li> <li role="none"><a href="/products/publications" title="Publications">Publications</a></li> <li role="none"><a href="/products" class="mainLink" title="All Products and Services Main Page">All Products and Services – Main Page</a></li> </ul> </li> <li role="none"> <a href="#help" class="item">HELP</a> <ul class="sm list-unstyled" role="menu"> <li role="none"><a href="/safetyinfoline.html">Ask a Question (Safety InfoLine)</a></li> <li role="none"><a href="/oshanswers">Fact Sheets (OSH Answers)</a></li> <li role="none"><a href="/ccohs/contacting.html?contact_us=online&showproducts">Technical Support</a></li> <li role="none"><a href="/products/faqs.html">Product FAQs</a></li> <li role="none"><a href="/copyright/copyright.html">Copyright Permission</a></li> <li role="none"><a href="/help" class="mainLink">Help – Main Page</a></li> </ul> </li> <li role="none"> <a href="#help" class="item">LOGIN</a> <ul class="sm list-unstyled" role="menu"> <li role="none"><a href="https://businesssafetyportal.ccohs.ca/?lang=en">Business Safety Portal</a></li> <li role="none"><a href="https://www.ccohs.ca/ccinfoweb">Databases</a></li> <li role="none"><a href="/products/courses/login.html">eCourses</a></li> <li role="none"><a href="/catalog/v5/account/login">Shopping Account</a></li> <li role="none"><a href="/legislation">Legislation plus Standards</a></li> <li role="none"><a href="https://canmanage.ccohs.ca/?lang=en">CANManage</a></li> <li role="none"><a href="/teach_tools">Teaching Tools</a></li> </ul> </li> </ul> </div> </div> </nav> </header> <nav role="navigation" id="wb-bc" property="breadcrumb"> <h2>Help Central</h2> <div class="container"> <div class="row"> <ol class="breadcrumb"> <li><a href="/">Home</a></li> </ol> </div> </div> </nav> <main role="main" property="mainContentOfPage" class="container"> <header role="banner"> <h1 id="wb-cont" property="name" class="main-title">Help Central</h1>  <p>Looking for assistance with our website, a product, or a health and safety issue? Help is here.</p> </header> <header role="banner"> <div class="row"> <div class="col-md-6"> <div class="well" style="min-height: 340px;"> <h2 class="h3 mrgn-tp-md pddn-0 full-width">General</h2> <ul class="list-unstyled-ccohs pddn-lft-10 no-underlined"> <li><a href="/safetyinfoline.html">Ask a Health and Safety Question</a></li> <li><a href="/search/text_size.html">Changing Text Size in Browsers</a></li> <li><a href="/copyright/copyright.html">Copyright Permission</a></li> <li><a href="/products/return-policy.html">Return Policy</a></li> <li><a href="/search/help.html">Search Help</a></li> <li><a href="/ccohs/contacting.html">Technical Help</a></li> <li><a href="/ccohs/important.html">Terms and Conditions</a></li> <li><a href="/quick_tips.html">Website Quick Tips</a></li> </ul> </div> </div> <div class="col-md-6"> <div class="well" style="min-height: 340px;"> <h2 class="h3 mrgn-tp-md pddn-0 full-width">Products and Services FAQs</h2> <ul class="list-unstyled-ccohs pddn-lft-10 no-underlined"> <li><a href="/products/faqs.html#canwrite">Applications and Software</a></li> <li><a href="/products/faqs.html#databases">Databases</a></li> <li><a href="/products/faqs.html#elearning">e-Learning</a></li> <li><a href="/products/faqs.html#legislation">Legislation</a></li> <li><a href="/products/msds/msdsservice.html">Management Services</a></li> <li><a href="/products/faqs.html#publication">Publications</a></li> </ul> </div> </div> </div>        </header>       </main>   <script>window.CCOHS_AUTH_USERINFO_COOKIE_NAME = 'userinfo';</script> <div id="small-buz-portal-save-page-as-link-section" data-sticky="small-buz-portal-footer" style="display: none;"> <section class="small-buz-portal-footer-content" aria-labelledby="save-page-as-quick-link-hdr"> <h2 id="save-page-as-quick-link-hdr" class="sr-only">Add page to saved links</h2> <ul class="sticky-footer-wrapper pddn-left-0 mrgn-bttm-0" role="list"> <li> <a href="/" aria-label="CCOHS home page"> <img src="/images/ccohs-cchst-logo.svg" width="246" height="24" alt="CCOHS logo" class="img-responsive" loading="lazy"> </a> </li> <li> <a href="https://businesssafetyportal.ccohs.ca/?lang=en" class="fs-button btn" data-bg-link="clr-primary-reverse"> Return to home </a> <button id="small-buz-portal-save-page-as-link-btn" type="button" class="fs-button btn" onclick="addtoSavedLink();" data-bg-link="clr-primary" style="display:none;"> Add page to saved links </button> </li> </ul> </section> </div>   <dialog class="animate pddn-0" id="dialog" data-ui="toast"> <section class="toast toast-success"> <div class="outer-wrapper outer-wrapper--space-between outer-wrapper--vertical-center outer-wrapper--gap"> <h3 class="mrgn-tp-0 pddn-tp-10">Success!</h3> <button type="button" onclick="this.closest('dialog').close('close')" class="btn-close-wrapper mrgn-tp-0" aria-label="Close"> <svg xmlns="http://www.w3.org/2000/svg" fill="currentColor" class="bi bi-x-circle-fill" viewBox="0 0 16 16" aria-hidden="true" focusable="false" role="img"> <path d="M16 8A8 8 0 1 1 0 8a8 8 0 0 1 16 0M5.354 4.646a.5.5 0 1 0-.708.708L7.293 8l-2.647 2.646a.5.5 0 0 0 .708.708L8 8.707l2.646 2.647a.5.5 0 0 0 .708-.708L8.707 8l2.647-2.646a.5.5 0 0 0-.708-.708L8 7.293z"> </path> </svg> </button> </div> <div> <p>This page has been added as a saved link.</p> </div> </section> </dialog>   <dialog class="animate pddn-0" id="dialog_error" data-ui="toast"> <section class="toast toast-error"> <div class="outer-wrapper outer-wrapper--space-between outer-wrapper--vertical-center outer-wrapper--gap"> <h3 class="mrgn-tp-0 pddn-tp-10">Error!</h3> <button type="button" onclick="this.closest('dialog').close('close')" class="btn-close-wrapper mrgn-tp-0" aria-label="Close"> <svg xmlns="http://www.w3.org/2000/svg" fill="currentColor" class="bi bi-x-circle-fill" viewBox="0 0 16 16" aria-hidden="true" focusable="false" role="img"> <path d="M16 8A8 8 0 1 1 0 8a8 8 0 0 1 16 0M5.354 4.646a.5.5 0 1 0-.708.708L7.293 8l-2.647 2.646a.5.5 0 0 0 .708.708L8 8.707l2.646 2.647a.5.5 0 0 0 .708-.708L8.707 8l2.647-2.646a.5.5 0 0 0-.708-.708L8 7.293z"> </path> </svg> </button> </div> <div> <p>This page could not be added as a saved link. Please try again later.</p> </div> </section> </dialog>    <footer> <div class="container" id="pageBottom"> <div class="ccohs-footer">  <div class="ccohs-footer__share"> <div class="wb-share" data-wb-share='{"pnlId": "pnl1","filter": ["blogger","diigo","email","facebook","gmail","linkedin","myspace","pinterest","reddit","tumblr","twitter","yahoomail"]}' id="share-top-padding"></div> </div>  <div class="outer-wrapper outer-wrapper--center text-center"> <a href="#top" class="inline-block-display link-top-page-wrapper" aria-label="Go to Top of Page"> <div class="link-top-page-wrapper__triangle"> <div class="text-uppercase fontSize80 full-width">Top of Page</div> </div> </a> </div>  <div> <dl id="wb-dtmd"> <dt>Date modified:</dt> <dd><time property="dateModified"> 2024-01-15 </time></dd> </dl> </div> </div> </div> </footer>  <footer role="contentinfo" id="wb-info" class="visible-sm visible-md visible-lg wb-navcurr"> <div class="container"> <nav role="navigation"> <h2>Site information</h2> <ul id="gc-tctr" class="list-inline"> <li><a rel="license" href="/ccohs/important.html">Terms and conditions</a></li> <li><a href="/ccohs/reports/transparency.html">Transparency</a></li> </ul> <div class="row"> <section class="col-sm-3"> <h3><a href="/ccohs.html">About Us</a></h3> <ul class="list-unstyled"> <li><a href="/ccohs/council.html">Council of Governors</a></li> <li><a href="/ccohs/reports.html">Corporate Reports</a></li> <li><a href="/ccohs/partner.html">Projects and Partnerships</a></li> <li><a href="/scholarships/">Scholarships</a></li> <li><a href="/ccohs/careers/">Careers</a></li> </ul> </section> <section class="col-sm-3"> <h3><a href="/newsroom/">Newsroom</a></h3> <ul class="list-unstyled"> <li><a href="/newsroom/news_releases">News Releases</a></li> <li><a href="/newsroom/media_advisories">Media Advisories</a></li> <li><a href="/newsroom/hot_topics">Hot Topics</a></li> <li><a href="/newsroom/ccohs_in_the_news">In the News</a></li> </ul> </section> <section class="col-sm-3"> <h3><a href="/ccohs/contacting.html">Contact Us</a></h3> <ul class="list-unstyled"> <li><a href="/ccohs/contacting.html?&contact_us=online#online">Online Form</a></li> <li><a href="/ccohs/contacting.html?&contact_us=phone#phone">Phone</a></li> <li><a href="/ccohs/contacting.html?&contact_us=mail#mail">Mail</a></li> <li><a href="/ccohs/contacting.html?&contact_us=location#location">Location</a></li> </ul> </section> <section class="col-sm-3"> <h3><a href="/ccohs/connectwithccohs.html">Stay Connected</a></h3> <ul class="list-unstyled"> <li><a rel="external" href="http://facebook.com/ccohs">Facebook</a></li> <li><a rel="external" href="http://twitter.com/ccohs">Twitter</a></li> <li><a rel="external" href="https://www.instagram.com/ccohs.cchst/">Instagram</a></li> <li><a rel="external" href="https://www.linkedin.com/company/canadian-centre-for-occupational-health-and-safety">LinkedIn</a> </li> <li><a href="/newsletters/">Newsletters</a></li> <li><a href="/events/">Events</a></li> </ul> </section> </div> </nav> </div> <div id="gc-info"> <div class="container"> <nav role="navigation"> <h2>Government of Canada footer</h2> <ul class="list-inline"> <li><a rel="external" href="http://healthycanadians.gc.ca"><span>Health</span></a></li> <li><a rel="external" href="http://travel.gc.ca"><span>Travel</span></a></li> <li><a rel="external" href="http://www.servicecanada.gc.ca/eng/home.shtml"><span>Service Canada</span></a></li> <li><a rel="external" href="http://www.jobbank.gc.ca"><span>Jobs</span></a></li> <li id="canada-ca"><a rel="external" href="http://www.canada.ca/en/index.html">Canada.ca</a></li> </ul> </nav> </div> </div> </footer> <script src="/wet-js/jquery/3.5.1/jquery.min.js"></script> <script src="/wet-js/wet-boew/4.0.65/wet-boew.min.js" data-wb-core data-asset="/assets/wet-boew/4.0.65" data-dep="/wet-js/wet-boew/4.0.65/deps" data-home="/" data-js="/wet-js/wet-boew/4.0.65" ></script> <script src="/wet-js/ccohs_general_jquery.js"></script>  <script>window.GA4 = "G-DFGEFE48GS";</script> <script src="/scripts/google_analytics-ga4.js" type="text/javascript"></script> <script> togglersInit(); (function (i, s, o, g, r, a, m) { i['GoogleAnalyticsObject'] = r; i[r] = i[r] || function () { (i[r].q = i[r].q || []).push(arguments) }, i[r].l = 1 * new Date(); a = s.createElement(o), m = s.getElementsByTagName(o)[0]; a.async = 1; a.src = g; m.parentNode.insertBefore(a, m) })(window, document, 'script', '//www.google-analytics.com/analytics.js', 'ga'); ga('create', 'UA-6347822-1', 'auto'); ga('send', 'pageview'); (function ($) { $(document).ready(function () { var GoogleAnalyticsLogSearch = function (category, label) { try { ga('send', { hitType: 'event', eventCategory: category, eventAction: 'Search', eventLabel: label }); } catch (e) { } }; var search_forms = { '#wb-srch-form': { category: 'CCOHS Search', input: '#wb-srch-q' }, '#oa-srch-form': { category: 'OSH Answers Search', input: '#btngrp-search2' }, }; $.each(search_forms, function (form_key, form_attrs) { $(form_key).on('submit', function () { GoogleAnalyticsLogSearch(form_attrs.category, $(form_attrs.input).val()); }); }); }); }(jQuery)); </script> <script src="/wet-js/taglinks.js?20200915"></script>   <script src="/wet-js/business_portal_add_to_saved_link.js"></script> </body> </html>

CINXE.COM

CCOHS: Canadian Centre for Occupational Health and Safety