W
Atomic mass: 183.8
ICSC # 1404
CAS # 7440-33-7
RTECS # YO7175000
UN # 3089
Pi, Study (1st batch of chemical part)
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Types of Hazard/ Exposure
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Acute Hazards/ Symptoms
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Prevention
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First Aid/
Fire Fighting
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FIRE
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In finely divided form highly flammable.
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NO open flames, NO sparks, and NO smoking.
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In case of fire in the surroundings: use appropriate extinguishing media.
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Explosion
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In case of fire: keep drums, etc., cool by spraying with water.
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Exposure
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PREVENT DISPERSION OF DUST!
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•Inhalation
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Cough.
Sore throat.
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Local exhaust.
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Fresh air, rest.
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•Skin
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Redness.
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Protective gloves.
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Rinse and then wash skin with water and soap.
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•Eyes
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Redness.
Pain.
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Safety spectacles.
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First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.
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•Ingestion
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Spillage Disposal
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Storage
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Packaging & Labelling
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Sweep spilled substance into containers; if appropriate, moisten first to prevent dusting.
Personal protection: P1 filter respirator for inert particles.
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Separated from strong oxidants and strong acids.
Well closed.
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UN Hazard Class: 4.2
UN Packing Group: III
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Important Data
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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
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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
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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:
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Physical
Properties
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Boiling point: 5900°C
Melting point: 3410°C
Density: 19.3
g/cm3
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Solubility in water:
none
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Environmental
Data
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N O T E S
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Card has been partly updated in April 2005. See section Occupational Exposure Limits.
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ADDITIONAL INFORMATION
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ICSC: 1404
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TUNGSTEN (powder)
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(C) IPCS, CEC, 1994
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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.
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