Chromium(III) sulfide

Chromium(III) Sulfide

Identifiers
CAS Number	12018-22-3 Y
EC Number	234-638-8
PubChem	159397
Properties
Chemical formula	Cr2S3
Molar mass	200.19 g/mol
Appearance	Brown to black powder
Odor	odorless
Density	3.77 g/cm3
Melting point	1350 °C
Solubility in water	insoluble
Vapor pressure	{{{value}}}
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.

Preparation

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

Properties

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

Health effects

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.