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<!DOCTYPE html> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"/> <title> TANTALUM (METAL AND OXIDE DUST) | CAMEO Chemicals | NOAA</title> <meta name="author" content="NOAA Office of Response and Restoration, US GOV" /> <meta name="viewport" content="width = device-width, minimum-scale = 1" /> <link rel="stylesheet" href="/static/css/mobile.css" type="text/css" media="all" /> <link rel="apple-touch-icon" href="/static/images/webclips/appletouch_180px.png" />  <script async type="text/javascript" src="https://dap.digitalgov.gov/Universal-Federated-Analytics-Min.js?agency=NOAA" id="_fed_an_ua_tag"></script> <script src="/static/js/cchem.js"></script> <meta name="noaa_id" content="25067" /> <noscript> <style type="text/css"> div.show_hide_triangle {display:none} div.helptext {display:block} </style> </noscript> </head>   <script> window.dataLayer = window.dataLayer || []; function gtag() { dataLayer.push(arguments); } gtag('js', new Date()); gtag('config', 'G-5PYBYD8S0P'); </script>  <body> <div class="beta"> Get the app in the <a href="https://apps.apple.com/app/apple-store/id1151912682">App Store</a> and on <a href="https://play.google.com/store/apps/details?id=gov.noaa.cameochemical&referrer=utm_source%3Dcameo_chemicals_website%26utm_medium%3Dbanner%26anid%3Dadmob">Google Play</a>! </div>  <div class="banner"> <a href="/search/simple"><img class="meatball noborder" src="/static/images/banner_icon.png" alt="" /> <h1 id="top"> CAMEO <span class="banner-chemicals">Chemicals</em></h1></a> </div> <ul class="navbar" id="header"> <li class="navlink" id="headlink1"> <a href="javascript:showNav()">Search</a> </li> <li class="navlink" id="headlink2"> <a href="/my">MyChemicals</a> </li> <li class="navlink" id="headlink3"> <a href="/reactivity">Reactivity</a> </li> </ul> <ul id="popup-nav" class="navlink"> <li> <a href="/search/simple">New<br /> Search</a> <li> <a href="/search/results">Search<br /> Results</a> </li> <li> <a href="/search/refine">Modify<br /> Search</a> </li> </ul>   <div class="mainbody">  <div class="title-box"> <h1 class="datasheet">TANTALUM (METAL AND OXIDE DUST)</h1> <img src="/static/images/placards/Placard4.1.png" alt="4.1 - Flammable solid" width="75" height="75" /> </div> <div class="dsht_buttons"> <a class="pseudo_button" href="/my/add/CH25067">Add to MyChemicals</a> </div>  <h2 id="section1" class="datasheet"> <div class="show_hide_triangle"> <a href='javascript:dropDownText("section1_info","section1_info_marker","/static/images/up_arrow.png","/static/images/down_arrow.png")' style="vertical-align:middle">Chemical Identifiers <img id="section1_info_marker" class="dropdown" src="/static/images/down_arrow.png" alt="" /> </a> </div> </h2> <div id="section1_info" class="chem_info"> <div class="section_help"> <div class="show_hide_triangle"> <a href='javascript:dropDownText("sec1_help","sec1_help_marker","/static/images/dropdown_opened.gif","/static/images/dropdown_closed.gif")' style="vertical-align:middle">What is this information? <img id="sec1_help_marker" class="dropdown" src="/static/images/dropdown_closed.gif" alt="" /> </a> </div> <div class="helptext" id="sec1_help"> The <a href="/help/chemical_datasheets/chemical_identifiers.htm" target="_blank">Chemical Identifier fields</a> include common identification numbers, the <a href="/help/reference/placards_guide/nfpa_diamond.htm" target="_blank">NFPA diamond</a> U.S. Department of Transportation hazard labels, and a general description of the chemical. The information in CAMEO Chemicals comes from a variety of <a href="/help/reference/data_sources.htm" target="_blank">data sources</a>. </div> </div> <table class="horizontal-fields" summary="chemical identifiers"> <thead> <tr> <th class="prop_label" id="th-cas" abbr="CAS numbers">CAS Number</th> <th class="prop_label" id="th-unna" abbr="UN/NA numbers">UN/NA Number</th> </tr> </thead> <tbody> <tr> <td headers="th-cas"> <ul class="no-bullet3"> <li>7440-25-7</li> </ul> </td> <td headers="th-unna"> <ul class="no-bullet3"> <li><a href="/unna/3089">3089</a> (powder) </li> </ul> </td> </tr> </tbody> <thead> <tr> <th class="prop_label" id="th-dot" abbr="DOT hazard labels">DOT Hazard Label</th> <th class="prop_label" id="th-chris">USCG CHRIS Code</th> </tr> </thead> <tbody> <tr> <td headers="th-dot"> <ul class="no-bullet3"> <li>Flammable Solid</li> </ul> </td> <td headers="th-chris"> <span class="no_data">none</span> </td> </tr> </tbody> <thead> <tr> <th class="prop_label" id="th-niosh">NIOSH Pocket Guide</th> <th class="prop_label" id="th-icsc">International Chem Safety Card</th> </tr> </thead> <tbody> <tr> <td headers="th-niosh"> <a href="https://www.cdc.gov/niosh/npg/npgd0585.html">Tantalum (metal and oxide dust, as Ta)</a><img src="/static/images/external_link.svg" alt="external_link" class="external-link" /> </td> <td headers="th-icsc"> <ul class="no-bullet3"> <li><a href="https://inchem.org/documents/icsc/icsc/eics1596.htm">TANTALUM</a><img src="/static/images/external_link.svg" alt="external_link" class="external-link" /></li> </ul> </td> </tr> </tbody> </table> <div class="field_label">NFPA 704</div> <div class="field_contents no_data">data unavailable</div> <div class="field_label">General Description</div> <div class="field_contents"> Tantalum dust is a black odorless powder. mp: 2996掳C, bp: approx. 5250掳C. Density: 16.65 g/cm3. Insoluble in water. Tantalum oxide dust is a white, microcrystalline powder mp: 1800掳C. Density: 7.6 g/cm3. Insoluble in water. The mixture is listed as a toxic inhalation hazard by OSHA. </div> </div>  <h2 id="section2" class="datasheet"> <div class="show_hide_triangle"> <a href='javascript:dropDownText("section2_info","section2_info_marker","/static/images/up_arrow.png","/static/images/down_arrow.png")' style="vertical-align:middle">Hazards <img id="section2_info_marker" class="dropdown" src="/static/images/down_arrow.png" alt="" /> </a> </div> </h2> <div id="section2_info" class="chem_info"> <div class="section_help"> <div class="show_hide_triangle"> <a href='javascript:dropDownText("sec2_help","sec2_help_marker","/static/images/dropdown_opened.gif","/static/images/dropdown_closed.gif")' style="vertical-align:middle">What is this information? <img id="sec2_help_marker" class="dropdown" src="/static/images/dropdown_closed.gif" alt="" /> </a> </div> <div class="helptext" id="sec2_help"> The <a href="/help/chemical_datasheets/hazards.htm" target="_blank">Hazard fields</a> include <a href="/help/reactivity/reactivity_alerts.htm" target="_blank">special hazard alerts</a> air and water reactions, fire hazards, health hazards, a reactivity profile, and details about <a href="/help/reactivity/how_reactivity_is_predicted.htm" target="_blank">reactive groups assignments</a> and <a href="/help/reference/absorbents_guide/overview.htm" target="_blank">potentially incompatible absorbents</a>. The information in CAMEO Chemicals comes from a variety of <a href="/help/reference/data_sources.htm" target="_blank">data sources</a>. </div> </div> <div class="field_label">Reactivity Alerts</div> <div class="field_contents"> <ul class="warnings"> <li>Strong Reducing Agent</li> <li>Pyrophoric</li> </ul> </div> <div class="field_label">Air & Water Reactions</div> <div class="field_contents"> Metal, Combustible Solid; powder ignites SPONTANEOUSLY in air. No rapid reaction with water. </div> <div class="field_label">Fire Hazard</div> <div class="field_contents"> Excerpt from <a href="/erg_guides/en/Guide_170.pdf">ERG Guide 170</a> [Metals (Powders, Dusts, Shavings, Borings, Turnings, or Cuttings, etc.)]:<br /> <br /> May react violently or explosively on contact with water. Some are transported in flammable liquids. May be ignited by friction, heat, sparks or flames. Some of these materials will burn with intense heat. Dusts or fumes may form explosive mixtures in air. Containers may explode when heated. May re-ignite after fire is extinguished. (ERG, 2024) </div> <div class="field_label">Health Hazard</div> <div class="field_contents"> Excerpt from <a href="https://www.cdc.gov/niosh/npg/npgd0585.html" target="_blank">NIOSH Pocket Guide for Tantalum (metal and oxide dust, as Ta)</a><img alt="external link" class="external-link" src="/static/images/external_link.svg" />:<br /> <br /> Exposure Routes: Inhalation, skin and/or eye contact<br /> <br /> Symptoms: Irritation eyes, skin; In Animals: pulmonary irritation<br /> <br /> Target Organs: Eyes, skin, respiratory system (NIOSH, 2024) </div> <div class="field_label">Reactivity Profile</div> <div class="field_contents"> TANTALUM dust reacts rapidly with oxidizing agents (oxygen, fluorine, chlorine). Highly flammable in air, igniting spontaneously when dry. (Lewis, 3rd Ed, 1993). Dissolves in molten bases (such as sodium hydroxide). Insoluble in aqueous bases. Insoluble in acids except hydrofluoric acid and fuming sulfuric acid. Tantalum in bulk form (bar, sheet, etc.) is much less reactive than it is in powdered form.<br /> <br /> TANTALUM OXIDE dust is generally unreactive at room conditions. Insoluble in water and acids with the exception of hydrofluoric acid. Reacts when strongly heated with sodium carbonate. </div> <div class="field_label">Belongs to the Following Reactive Group(s)</div> <div class="field_contents"> <ul> <li><a href="/react/22">Metals, Elemental and Powder, Active</a></li> </ul> </div> <div class="field_label">Potentially Incompatible Absorbents</div> <div class="field_contents"> <p><span class="no_data">No information available.</span></p> </div> </div>  <h2 id="section3" class="datasheet"> <div class="show_hide_triangle"> <a href='javascript:dropDownText("section3_info","section3_info_marker","/static/images/up_arrow.png","/static/images/down_arrow.png")' style="vertical-align:middle">Response Recommendations <img id="section3_info_marker" class="dropdown" src="/static/images/down_arrow.png" alt="" /> </a> </div> </h2> <div id="section3_info" class="chem_info"> <div class="section_help"> <div class="show_hide_triangle"> <a href='javascript:dropDownText("sec3_help","sec3_help_marker","/static/images/dropdown_opened.gif","/static/images/dropdown_closed.gif")' style="vertical-align:middle">What is this information? <img id="sec3_help_marker" class="dropdown" src="/static/images/dropdown_closed.gif" alt="" /> </a> </div> <div class="helptext" id="sec3_help"> The <a href="/help/chemical_datasheets/response_recommendations.htm" target="_blank">Response Recommendation fields</a> include isolation and evacuation distances, as well as recommendations for firefighting, non-fire response, protective clothing, and first aid. The information in CAMEO Chemicals comes from a variety of <a href="/help/reference/data_sources.htm" target="_blank">data sources</a>. </div> </div> <div class="field_label">Isolation and Evacuation</div> <div class="field_contents"> Excerpt from <a href="/erg_guides/en/Guide_170.pdf">ERG Guide 170</a> [Metals (Powders, Dusts, Shavings, Borings, Turnings, or Cuttings, etc.)]:<br /> <br /> IMMEDIATE PRECAUTIONARY MEASURE: Isolate spill or leak area in all directions for at least 50 meters (150 feet) for liquids and at least 25 meters (75 feet) for solids.<br /> <br /> LARGE SPILL: Consider initial downwind evacuation for at least 50 meters (160 feet).<br /> <br /> FIRE: If tank, rail tank car or highway tank is involved in a fire, ISOLATE for 800 meters (1/2 mile) in all directions; also, consider initial evacuation for 800 meters (1/2 mile) in all directions. (ERG, 2024) </div> <div class="field_label">Firefighting</div> <div class="field_contents"> Excerpt from <a href="/erg_guides/en/Guide_170.pdf">ERG Guide 170</a> [Metals (Powders, Dusts, Shavings, Borings, Turnings, or Cuttings, etc.)]:<br /> <br /> DO NOT USE WATER, FOAM OR CO2. Dousing metallic fires with water will generate hydrogen gas, an extremely dangerous explosion hazard, particularly if fire is in a confined environment (i.e., building, cargo hold, etc.). Use DRY sand, graphite powder, dry sodium chloride-based extinguishers, or class D extinguishers. Confining and smothering metal fires is preferable rather than applying water. If it can be done safely, move undamaged containers away from the area around the fire.<br /> <br /> FIRE INVOLVING TANKS, RAIL TANK CARS OR HIGHWAY TANKS: If impossible to extinguish, protect surroundings and allow fire to burn itself out. (ERG, 2024) </div> <div class="field_label">Non-Fire Response</div> <div class="field_contents"> Excerpt from <a href="/erg_guides/en/Guide_170.pdf">ERG Guide 170</a> [Metals (Powders, Dusts, Shavings, Borings, Turnings, or Cuttings, etc.)]:<br /> <br /> ELIMINATE all ignition sources (no smoking, flares, sparks or flames) from immediate area. Do not touch or walk through spilled material. Stop leak if you can do it without risk. Prevent entry into waterways, sewers, basements or confined areas. (ERG, 2024) </div> <div class="field_label">Protective Clothing</div> <div class="field_contents"> Excerpt from <a href="https://www.cdc.gov/niosh/npg/npgd0585.html" target="_blank">NIOSH Pocket Guide for Tantalum (metal and oxide dust, as Ta)</a><img alt="external link" class="external-link" src="/static/images/external_link.svg" />:<br /> <br /> Skin: No recommendation is made specifying the need for personal protective equipment for the body.<br /> <br /> Eyes: No recommendation is made specifying the need for eye protection.<br /> <br /> Wash skin: No recommendation is made specifying the need for washing the substance from the skin (either immediately or at the end of the work shift).<br /> <br /> Remove: No recommendation is made specifying the need for removing clothing that becomes wet or contaminated.<br /> <br /> Change: No recommendation is made specifying the need for the worker to change clothing after the workshift. (NIOSH, 2024) </div> <div class="field_label"> DuPont Tychem庐 Suit Fabrics </div> <div class="field_contents"> <span class="no_data">No information available.</span> </div> <div class="field_label">First Aid</div> <div class="field_contents"> Excerpt from <a href="https://www.cdc.gov/niosh/npg/npgd0585.html" target="_blank">NIOSH Pocket Guide for Tantalum (metal and oxide dust, as Ta)</a><img alt="external link" class="external-link" src="/static/images/external_link.svg" />:<br /> <br /> Eye: IRRIGATE IMMEDIATELY - If this chemical contacts the eyes, immediately wash (irrigate) the eyes with large amounts of water, occasionally lifting the lower and upper lids. Get medical attention immediately.<br /> <br /> Breathing: RESPIRATORY SUPPORT - If a person breathes large amounts of this chemical, move the exposed person to fresh air at once. If breathing has stopped, perform artificial respiration. Keep the affected person warm and at rest. Get medical attention as soon as possible. (NIOSH, 2024) </div> </div>  <h2 id="section4" class="datasheet"> <div class="show_hide_triangle"> <a href='javascript:dropDownText("section4_info","section4_info_marker","/static/images/up_arrow.png","/static/images/down_arrow.png")' style="vertical-align:middle">Physical Properties <img id="section4_info_marker" class="dropdown" src="/static/images/down_arrow.png" alt="" /> </a> </div> </h2> <div id="section4_info" class="chem_info"> <div class="section_help"> <div class="show_hide_triangle"> <a href='javascript:dropDownText("sec4_help","sec4_help_marker","/static/images/dropdown_opened.gif","/static/images/dropdown_closed.gif")' style="vertical-align:middle">What is this information? <img id="sec4_help_marker" class="dropdown" src="/static/images/dropdown_closed.gif" alt="" /> </a> </div> <div class="helptext" id="sec4_help"> The <a href="/help/chemical_datasheets/physical_properties.htm" target="_blank">Physical Property fields</a> include properties such as vapor pressure and boiling point, as well as explosive limits and <a href="/help/reference/locs_guide/overview.htm" target="_blank">toxic exposure thresholds</a> The information in CAMEO Chemicals comes from a variety of <a href="/help/reference/data_sources.htm" target="_blank">data sources</a>. <br /> <br /> <strong>Note:</strong> For Vapor Density and Specific Gravity, comparing the value to 1.0 can tell you if the chemical will likely sink/rise in air or sink/float in fresh water (respectively). Short phrases have been added to those values below as an aid. However, make sure to also consider the circumstances of a release. The Vapor Density comparisons are only valid when the gas escaping is at the same temperature as the surrounding air itself. If the chemical is escaping from a container where it was pressurized or refrigerated, it may first escape and behave as a heavy gas and sink in the air (even if it has a Vapor Density value less than 1). Also, the Specific Gravity comparisons are for fresh water (density 1.0 g/mL). If your spill is in salt water (density about 1.027 g/mL), you need to adjust the point of comparison. There are some chemicals that will sink in fresh water and float in salt water. </div> </div> <table> <tr> <td class="prop_label" valign="top">Chemical Formula:</td> <td valign="top"> <ul class="no-bullet3"> <li>Ta (metal)</li> </ul> </td> </tr> </table> <div class="physical_props"> <span class="no_data">Flash Point: data unavailable</span> </div> <div class="physical_props"> <span class="no_data">Lower Explosive Limit (LEL): data unavailable</span> </div> <div class="physical_props"> <span class="no_data">Upper Explosive Limit (UEL): data unavailable</span> </div> <div class="physical_props"> <span class="no_data">Autoignition Temperature: data unavailable</span> </div> <div class="physical_props"> <span class="prop_label">Melting Point:</span> 5425掳F (NIOSH, 2024) </div> <div class="physical_props"> <span class="prop_label">Vapor Pressure:</span> 0 mmHg (approx) (NIOSH, 2024) </div> <div class="physical_props"> <span class="no_data">Vapor Density (Relative to Air): data unavailable</span> </div> <div class="physical_props"> <span class="prop_label">Specific Gravity:</span> 16.65 (metal), 14.40 (powder) (NIOSH, 2024) - Denser than water; will sink </div> <div class="physical_props"> <span class="prop_label">Boiling Point:</span> 9797掳F at 760 mmHg (NIOSH, 2024) </div> <div class="physical_props"> <span class="prop_label">Molecular Weight:</span> 180.9 (NIOSH, 2024) </div> <div class="physical_props"> <span class="prop_label">Water Solubility:</span> Insoluble (NIOSH, 2024) </div> <div class="physical_props"> <span class="no_data">Ionization Energy/Potential: data unavailable</span> </div> <div class="physical_props"> <span class="prop_label">IDLH:</span> 2500 mg Ta/m3 (NIOSH, 2024) </div> <div class="physical_props"> <h3>AEGLs (Acute Exposure Guideline Levels)</h3> <span class="no_data">No AEGL information available.</span> </div> <div class="physical_props"> <h3>ERPGs (Emergency Response Planning Guidelines)</h3> <span class="no_data">No ERPG information available.</span> </div> <div class="physical_props"> <h3>PACs (Protective Action Criteria)</h3> <table class="gridded pac"> <thead> <tr> <th scope="col" class="name">Chemical</th> <th scope="col" class="value">PAC-1</th> <th scope="col" class="value">PAC-2</th> <th scope="col" class="value">PAC-3</th> </tr> </thead> <tbody> <tr> <td class="name">Tantalum (7440-25-7) </td> <td class="value">10 mg/m3 </td> <td class="value">11 mg/m3 </td> <td class="value">64 mg/m3 </td> </tr> </tbody> </table> <div class="footnotes"> </div> <div>(DOE, 2024)</div> </div> </div>  <h2 id="section5" class="datasheet"> <div class="show_hide_triangle"> <a href='javascript:dropDownText("section5_info","section5_info_marker","/static/images/up_arrow.png","/static/images/down_arrow.png")' style="vertical-align:middle">Regulatory Information <img id="section5_info_marker" class="dropdown" src="/static/images/down_arrow.png" alt="" /> </a> </div> </h2> <div id="section5_info" class="chem_info"> <div class="section_help"> <div class="show_hide_triangle"> <a href='javascript:dropDownText("sec5_help","sec5_help_marker","/static/images/dropdown_opened.gif","/static/images/dropdown_closed.gif")' style="vertical-align:middle">What is this information? <img id="sec5_help_marker" class="dropdown" src="/static/images/dropdown_closed.gif" alt="" /> </a> </div> <div class="helptext" id="sec5_help"> The <a href="/help/chemical_datasheets/regulatory_information.htm" target="_blank">Regulatory Information fields</a> include information from the U.S. Environmental Protection Agency's Title III Consolidated List of Lists, the U.S. Cybersecurity and Infrastructure Security Agency's Chemical Facility Anti-Terrorism Standards, and the U.S. Occupational Safety and Health Administration's Process Safety Management of Highly Hazardous Chemicals Standard List (see more about these <a href="/help/reference/data_sources.htm" target="_blank">data sources</a>). </div> </div> <h3>EPA Consolidated List of Lists</h3> <span class="no_data">No regulatory information available.</span> <h3>CISA Chemical Facility Anti-Terrorism Standards (CFATS)</h3> <span class="no_data">No regulatory information available.</span> <h3>OSHA Process Safety Management (PSM) Standard List</h3> <span class="no_data">No regulatory information available.</span> </div>  <h2 id="section6" class="datasheet"> <div class="show_hide_triangle"> <a href='javascript:dropDownText("section6_info","section6_info_marker","/static/images/up_arrow.png","/static/images/down_arrow.png")' style="vertical-align:middle">Alternate Chemical Names <img id="section6_info_marker" class="dropdown" src="/static/images/down_arrow.png" alt="" /> </a> </div> </h2> <div id="section6_info" class="chem_info"> <div class="section_help"> <div class="show_hide_triangle"> <a href='javascript:dropDownText("sec6_help","sec6_help_marker","/static/images/dropdown_opened.gif","/static/images/dropdown_closed.gif")' style="vertical-align:middle">What is this information? <img id="sec6_help_marker" class="dropdown" src="/static/images/dropdown_closed.gif" alt="" /> </a> </div> <div class="helptext" id="sec6_help"> This section provides a listing of alternate names for this chemical, including trade names and synonyms. </div> </div> <div class="field_label"></div> <div id="" class="field_contents"> <ul> <li>C 606</li> <li>JIS H4701 TAH</li> <li>JIS TAH</li> <li>TANTALIC ACID ANHYDRIDE</li> <li>TANTALUM</li> <li>TANTALUM (METAL AND OXIDE DUST)</li> <li>TANTALUM METAL</li> <li>TANTALUM METAL: TANTALUM-181</li> <li>TANTALUM OXIDE</li> <li>TANTALUM PENTOXIDE</li> <li>TANTALUM-181</li> </ul> </div> </div>   <ul id="footer" class="navbar"> <li class="navlink navlink-fullsite"> <a href="https://cameochemicals.noaa.gov/chemical/25067">Full Site</a> </li> <li class="navlink navlink-about"> <a href="/about">About</a> </li> <li class="navlink navlink-privacypolicy"> <a href="/privacy">Privacy Policy</a> </li> </ul> <p style="text-align: center"> <a href="/help/intro/contact_us.htm" target="_blank">Contact Us</a> | <a href="https://touchpoints.app.cloud.gov/touchpoints/9513f1f8/submit" target="_blank">Website Satisfaction Survey</a><img src="/static/images/external_link.svg" alt="external_link" class="external-link" /> </p> <p id="version">Version 3.1.0 rev 1</p>  </div>  </body> </html>