Chromium(III) sulfide

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Chromium(III) Sulfide
12018-22-3 YesY
EC Number 234-638-8
PubChem 159397
Molar mass 200.19 g/mol
Appearance Brown to black powder
Odor odorless
Density 3.77 g/cm3
Melting point 1350 °C
Safety data sheet [1]
NFPA 704
Flammability code 0: Will not burn. E.g., water Health code 1: Exposure would cause irritation but only minor residual injury. E.g., turpentine Reactivity code 0: Normally stable, even under fire exposure conditions, and is not reactive with water. E.g., liquid nitrogen Special hazards (white): no codeNFPA 704 four-colored diamond
US health exposure limits (NIOSH):
PEL (Permissible)
TWA 1 mg/m3[1]
REL (Recommended)
TWA 0.5 mg/m3[1]
IDLH (Immediate danger)
250 mg/m3[1]
Related compounds
Other anions
Chromium(III) oxide
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references

Chromium(III) Sulfide is the sulfide salt of trivalent chromium.


It may be formed by the reaction of hydrogen sulfide with chromium(III) oxide or other chromium salts.


Chromium(III) sulfide appears as a brownish black powder that melts at 1350 C. It is essentially insoluble in water.[2] When heated sufficiently, it will oxidize in the presence of air or oxygen, though it is otherwise fairly stable.

Health effects[edit]

Chromium (VI) is a confirmed carcinogen in humans. Because chromium(III) sulfide is fairly insoluble in water, it is much less toxic than other chromium compounds. However, in-vivo oxidation of chromium(III) to chromium(VI) can render it highly toxic and carcinogenic. As with all chromium-containing species, care must be taken to avoid ingestion of chromium(III) sulfide.