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TANTALUM (METAL AND OXIDE DUST)

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The Chemical Identifier fields include common identification numbers, the NFPA diamond, U.S. Department of Transportation hazard labels, and a general description of the chemical. The information in CAMEO Chemicals comes from a variety of data sources.
CAS Number UN/NA Number
  • 7440-25-7
none
DOT Hazard Label USCG CHRIS Code
data unavailable none
NIOSH Pocket Guide International Chem Safety Card
Tantalum (metal and oxide dust, as Ta)external link
NFPA 704
data unavailable
General Description
Tantalum dust is a black odorless powder. mp: 2996° C, bp: approx. 5250°C. Density: 16.65 g/cm3. Insoluble in water. Tantalum oxide dust is a white, microcrystalline powder mp: 1800°C. Density: 7.6 g/cm3. Insoluble in water. The mixture is listed as a toxic inhalation hazard by OSHA.

The Hazard fields include special hazard alerts, air and water reactions, fire hazards, health hazards, a reactivity profile, and details about reactive groups assignments and potentially incompatible absorbents. The information in CAMEO Chemicals comes from a variety of data sources.
Reactivity Alerts
  • Strong Reducing Agent
  • Pyrophoric
Air & Water Reactions
Metal, Combustible Solid; powder ignites SPONTANEOUSLY in air. Highly flammable in Air (powdered form) No rapid reaction with water
Fire Hazard
No information available.
Health Hazard
Exposure Routes: inhalation, skin and/or eye contact

Symptoms: Irritation eyes, skin

Target Organs: Eyes, skin, respiratory system (NIOSH, 2016)
Reactivity Profile
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.

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.
Belongs to the Following Reactive Group(s)
Potentially Incompatible Absorbents

No information available.

The Response Recommendation fields 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 data sources.
Isolation and Evacuation
No information available.
Firefighting
No information available.
Non-Fire Response
No information available.
Protective Clothing
Skin: No recommendation is made specifying the need for personal protective equipment for the body.

Eyes: No recommendation is made specifying the need for eye protection.

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).

Remove: No recommendation is made specifying the need for removing clothing that becomes wet or contaminated.

Change: No recommendation is made specifying the need for the worker to change clothing after the work shift. (NIOSH, 2016)
DuPont Tychem® Suit Fabrics
No information available.
First Aid
Eye: If this chemical contacts the eyes, immediately wash the eyes with large amounts of water, occasionally lifting the lower and upper lids. Get medical attention immediately. Contact lenses should not be worn when working with this chemical.

Breathing: If a person breathes large amounts of this chemical, move the exposed person to fresh air at once. If breathing has stopped, perform mouth-to-mouth resuscitation. Keep the affected person warm and at rest. Get medical attention as soon as possible. (NIOSH, 2016)

The Physical Property fields include properties such as vapor pressure and boiling point, as well as explosive limits and toxic exposure thresholds. The information in CAMEO Chemicals comes from a variety of data sources.
Chemical Formula:
  • Ta (metal)
Flash Point: data unavailable
Lower Explosive Limit (LEL): data unavailable
Upper Explosive Limit (UEL): data unavailable
Autoignition Temperature: data unavailable
Melting Point: 5425 ° F (NIOSH, 2016)
Vapor Pressure: 0 mm Hg (approx) (NIOSH, 2016)
Vapor Density (Relative to Air): data unavailable
Specific Gravity: 16.65 (metal), 14.40 (powder) (NIOSH, 2016)
Boiling Point: 9797 ° F at 760 mm Hg (NIOSH, 2016)
Molecular Weight: 180.9 (NIOSH, 2016)
Water Solubility: Insoluble (NIOSH, 2016)
Ionization Potential: data unavailable
IDLH: 2500 mg/m3 (as Ta) (NIOSH, 2016)

AEGLs (Acute Exposure Guideline Levels)

No AEGL information available.

ERPGs (Emergency Response Planning Guidelines)

No ERPG information available.

PACs (Protective Action Criteria)

Chemical PAC-1 PAC-2 PAC-3
Tantalum (7440-25-7) 10 mg/m3 11 mg/m3 64 mg/m3
(DOE, 2016)

The Regulatory Information fields include information from the U.S. Environmental Protection Agency's Title III Consolidated List of Lists, the U.S. Department of Homeland Security'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 data sources).

EPA Consolidated List of Lists

No regulatory information available.

DHS Chemical Facility Anti-Terrorism Standards (CFATS)

No regulatory information available.

OSHA Process Safety Management (PSM) Standard List

No regulatory information available.

This section provides a listing of alternate names for this chemical, including trade names and synonyms.
  • C 606
  • JIS H4701 TAH
  • JIS TAH
  • TANTALIC ACID ANHYDRIDE
  • TANTALUM
  • TANTALUM (METAL AND OXIDE DUST)
  • TANTALUM METAL
  • TANTALUM METAL: TANTALUM-181
  • TANTALUM OXIDE
  • TANTALUM PENTOXIDE
  • TANTALUM-181

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