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TANTALUMICSC: 1596
October 2005
CAS #: 7440-25-7
UN #: 3089
EC Number: 231-135-5

  ACUTE HAZARDS PREVENTION FIRE FIGHTING
FIRE & EXPLOSION Combustible. May ignite spontaneously on contact with air.  Finely dispersed particles form explosive mixtures in air.  NO open flames, NO sparks and NO smoking.  Closed system, dust explosion-proof electrical equipment and lighting. Prevent deposition of dust.  Use dry powder, dry sand, special powder. NO carbon dioxide, foam, water.  In case of fire: keep drums, etc., cool by spraying with water. NO direct contact with water. 

 PREVENT DISPERSION OF DUST!  
  SYMPTOMS PREVENTION FIRST AID
Inhalation Cough.  Avoid inhalation of dust.  Fresh air, rest. 
Skin   Protective gloves.  Remove contaminated clothes. Rinse and then wash skin with water and soap. 
Eyes Redness.  Wear safety spectacles.  First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then refer for medical attention. 
Ingestion   Do not eat, drink, or smoke during work.  Rinse mouth. 

SPILLAGE DISPOSAL CLASSIFICATION & LABELLING
Remove all ignition sources. Personal protection: particulate filter respirator adapted to the airborne concentration of the substance. Cover the spilled material with dry inert absorbent. Vacuum spilled material with specialist equipment. Then store and dispose of according to local regulations. 

According to UN GHS Criteria

 

Transportation
UN Classification
UN Hazard Class: 4.1; UN Pack Group: II 

STORAGE
Fireproof. Separated from strong oxidants and halogens. 
PACKAGING
Airtight. 
TANTALUM ICSC: 1596
PHYSICAL & CHEMICAL INFORMATION

Physical State; Appearance
BLACK SOLID IN VARIOUS FORMS. 

Physical dangers
Dust explosion possible if in powder or granular form, mixed with air. 

Chemical dangers
Reacts with halogens and oxidants. This generates fire and explosion hazard. 

Formula: Ta
Atomic mass: 180.9
Boiling point: 5425°C
Melting point: 2996°C
Density: 14.5 g/cm³
Solubility in water: none
Flash point: >250°C 


EXPOSURE & HEALTH EFFECTS

Routes of exposure
 

Effects of short-term exposure
May cause mechanical irritation. 

Inhalation risk
A nuisance-causing concentration of airborne particles can be reached quickly when dispersed. 

Effects of long-term or repeated exposure
 


OCCUPATIONAL EXPOSURE LIMITS
MAK: carcinogen category: 3A; pregnancy risk group: C 

ENVIRONMENT
 

NOTES
Combustion in a confined space may turn into detonation. 

ADDITIONAL INFORMATION
  EC Classification
 

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    See Also:
       Toxicological Abbreviations