ICSC 1596 - TANTALUM

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TANTALUM

ICSC: 1596
_{October 2005}

(powder)

CAS No: 7440-25-7
RTECS No: WW5505000
UN No: 3089

Ta
Atomic mass: 180.9

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.	UN Hazard Class: 4.1 UN Pack Group: II	Airtight.

EMERGENCY RESPONSE	SAFE STORAGE
Transport Emergency Card: TEC (R)-41GF3-II+III NFPA Code: H1; F3; R1	Fireproof. Separated from strong oxidants and halogens.

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/m³ as TWA; (ACGIH 2005). MAK: (Inhalable fraction) 4 mg/m³; (Respirable fraction) 1.5 mg/m³; (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	ENVIRONMENTAL DATA
Boiling point: 5425°C Melting point: 2996°C Density: 14.5 g/cm³ Solubility in water: none Flash point: >250°C

NOTES

Combustion in a confined space may turn into detonation.

IPCS
International
Programme on
Chemical Safety

Prepared in the context of cooperation between the International Programme on Chemical Safety and the European Commission
© IPCS 2004

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