Chrome
Cr
Atomic mass: 52.0
(powder)
ICSC # 0029
CAS # 7440-47-3
RTECS # GB4200000
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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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Combustible under specific conditions.
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No open flames if in powder form.
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In case of fire in the surroundings: use appropriate extinguishing media.
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Explosion
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Prevent deposition of dust; closed system, dust explosion-proof electrical equipment and lighting.
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Exposure
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PREVENT DISPERSION OF DUST!
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•Inhalation
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Cough.
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Local exhaust or breathing protection.
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Fresh air, rest.
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•Skin
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Protective gloves.
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Remove contaminated clothes.
Rinse skin with plenty of water or shower.
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•Eyes
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Redness.
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Safety goggles.
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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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Do not eat, drink, or smoke during work.
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Rinse mouth.
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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: P2 filter respirator for harmful particles.
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Important Data
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Physical State; Appearance:
GREY
POWDER
Physical Dangers:
Dust explosion possible if in powder or granular form, mixed with air.
Chemical Dangers:
Chromium is a catalytic substance and may cause reaction in contact with many organic and inorganic substances
, causing fire and explosion hazard.
Occupational Exposure Limits:
TLV: (as Cr metal, Cr(III) compounds) 0.5 mg/m3 as TWA; A4; (ACGIH 2004).
MAK not established.
OSHA PEL*: TWA 1 mg/m3 See Appendix C *Note: The PEL also applies to insoluble chromium salts.
NIOSH REL: TWA 0.5 mg/m3 See Appendix C
NIOSH IDLH: 250 mg/m3 (as Cr) See: 7440473
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Routes of Exposure:
Inhalation Risk:
A harmful concentration of airborne particles can be reached quickly when dispersed.
Effects of Short-Term Exposure:
May cause mechanical irritation tothe eyesandthe respiratory tract.
Effects of Long-Term or Repeated Exposure:
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Physical
Properties
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Boiling point: 2642°C
Melting point: 1900°C
Density: 7.15
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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The surface of the chromium particles is oxidized to chromium(III)oxide in air.
See ICSC 1531 Chromium(III) oxide.
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ADDITIONAL INFORMATION
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ICSC: 0029
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CHROMIUM
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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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