Skip directly to search Skip directly to A to Z list Skip directly to page options Skip directly to site content
NIOSH

TUNGSTEN (powder)

ICSC: 1404

W
Atomic mass: 183.8
ICSC # 1404 		CAS # 7440-33-7
RTECS # YO7175000
UN # 3089
October 17, 2001 Validated
Pi, Study (1st batch of chemical part)

TYPES OF HAZARD/ EXPOSURE

ACUTE HAZARDS/ SYMPTOMS

PREVENTION

FIRST AID/
FIRE FIGHTING

FIRE In finely divided form highly flammable.
NO open flames, NO sparks, and NO smoking.
In case of fire in the surroundings: use appropriate extinguishing media.
EXPLOSION

In case of fire: keep drums, etc., cool by spraying with water.
EXPOSURE
PREVENT DISPERSION OF DUST!

•INHALATION Cough. Sore throat.
Local exhaust.
Fresh air, rest.
•SKIN Redness.
Protective gloves.
Rinse and then wash skin with water and soap.
•EYES Redness. Pain.
Safety spectacles.
First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.
•INGESTION


SPILLAGE DISPOSAL

STORAGE

PACKAGING & LABELLING

Sweep spilled substance into containers; if appropriate, moisten first to prevent dusting. Personal protection: P1 filter respirator for inert particles.
Separated from strong oxidants and strong acids. Well closed.

UN Hazard Class: 4.2
UN Packing Group: III
ICSC: 1404 Prepared in the context of cooperation between the International Programme on Chemical Safety & the Commission of the European Communities (C) IPCS CEC 1994. No modifications to the International version have been made except to add the OSHA PELs, NIOSH RELs and NIOSH IDLH values.

TUNGSTEN (powder)

ICSC: 1404

I

M

P

O

R

T

A

N

T


D

A

T

A

PHYSICAL STATE; APPEARANCE:
GREY TO WHITE POWDER

PHYSICAL DANGERS:


CHEMICAL DANGERS:
The substance may ignite spontaneously on contact with air. Reacts with oxidants causing fire and explosion hazard. Reacts violently with strong acids .

OCCUPATIONAL EXPOSURE LIMITS:
TLV: 5 mg/m3 as TWA, 10 mg/m3 as STEL; (ACGIH 2004).
MAK: IIb (not established but data is available) (DFG 2004).
OSHA PEL†: none
NIOSH REL*: TWA 5 mg/m3 ST 10 mg/m3 *Note: The REL also applies to other insoluble tungsten compounds (as W).
NIOSH IDLH: N.D. See: IDLH INDEX


ROUTES OF EXPOSURE:
The substance can be absorbed into the body by inhalation.

INHALATION RISK:
A harmful concentration of airborne particles can be reached quickly when dispersed.

EFFECTS OF SHORT-TERM EXPOSURE:
May cause mechanical irritation to the eyes the skin and the respiratory tract.

EFFECTS OF LONG-TERM OR REPEATED EXPOSURE:

PHYSICAL
PROPERTIES

Boiling point: 5900°C
Melting point: 3410°C
Density: 19.3
g/cm3
Solubility in water:
none

ENVIRONMENTAL
DATA


N O T E S

Card has been partly updated in April 2005. See section Occupational Exposure Limits.

ADDITIONAL INFORMATION



ICSC: 1404 TUNGSTEN (powder)
(C) IPCS, CEC, 1994
IMPORTANT LEGAL NOTICE: Neither NIOSH, the CEC or the IPCS nor any person acting on behalf of NIOSH, the CEC or the IPCS is responsible for the use which might be made of this information. This card contains the collective views of the IPCS Peer Review Committee and may not reflect in all cases all the detailed requirements included in national legislation on the subject. The user should verify compliance of the cards with the relevant legislation in the country of use. The only modifications made to produce the U.S. version is inclusion of the OSHA PELs, NIOSH RELs and NIOSH IDLH values.
Top