INTOX Home Page
TANTALUM ICSC: 1596
Date of Peer Review: October 2005

(powder)
CAS # 7440-25-7 Ta
RTECS # WW5505000 Atomic mass: 180.9
UN # 3089
EC Index #
TYPES OF HAZARD / EXPOSURE ACUTE HAZARDS / SYMPTOMS PREVENTION FIRST AID / FIRE FIGHTING
FIRE Combustible. Dry tantalum powder may spontaneously ignite on contact with air.
NO open flames, NO sparks, and NO smoking.
Dry powder. Dry sand. Special powder. NO carbon dioxide, foam, water.
EXPLOSION Finely dispersed particles form explosive mixtures in air.
Prevent deposition of dust; closed system, dust explosion-proof electrical equipment and lighting.
In case of fire: cool drums, etc., by spraying with water but avoid contact of the substance with water.
EXPOSURE
PREVENT DISPERSION OF DUST!

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.
Safety spectacles.
First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.
Ingestion
Do not eat, drink, or smoke during work.
Rinse mouth.
SPILLAGE DISPOSAL PACKAGING & LABELLING
Remove all ignition sources. Personal protection: P1 filter respirator for inert particles. Cover the spilled material with inert absorbent. Vacuum spilled material, then remove to safe place.
Airtight.
EU Classification
UN Classification
UN Hazard Class: 4.1
UN Pack Group: II
EMERGENCY RESPONSE STORAGE
Transport Emergency Card: TEC (R)-41GF3-II+III
NFPA Code: H1; F3; R1;
Fireproof. Separated from strong oxidants and halogens.
IPCS
International
Programme on
Chemical Safety
Prepared in the context of cooperation between the International Programme on Chemical Safety and the Commission of the European Communities IPCS, CEC 2005

SEE IMPORTANT INFORMATION ON BACK
TANTALUM ICSC: 1596
IMPORTANT DATA
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 causing fire and explosion hazard.

OCCUPATIONAL EXPOSURE LIMITS:
TLV: 5 mg/m as TWA; (ACGIH 2005).
MAK: (Inhalable fraction) 4 mg/m; (Respirable fraction) 1.5 mg/m; (DFG 2005).
INHALATION RISK:
A nuisance-causing concentration of airborne particles can be reached quickly when dispersed.

EFFECTS OF SHORT-TERM EXPOSURE:
May cause mechanical irritation.

PHYSICAL PROPERTIES
Boiling point: 5425C
Melting point: 2996C
Density: 14.5 g/cm
Solubility in water: none
Flash point: >250C
ENVIRONMENTAL DATA

NOTES
Combustion in a confined space may turn into detonation.
ADDITIONAL INFORMATION


LEGAL NOTICE Neither the CEC nor the IPCS nor any person acting on behalf of the CEC or the IPCS is responsible for the use which might be made of this information
IPCS, CEC 2005