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Chromium(III) sulfide

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Title: Chromium(III) sulfide  
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Subject: Sulfides, Uranium disulfide, Potassium tetraperoxochromate(V), Chromium(VI) oxide peroxide, Chromyl fluoride
Collection: Chromium Compounds, Sulfides
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Chromium(III) sulfide

Chromium(III) Sulfide
Identifiers
 YesY
EC number 234-638-8
PubChem
Properties
Cr2S3
Molar mass 200.19 g/mol
Appearance Brown to black powder
Odor odorless
Density 3.77 g/cm3
Melting point 1350 °C
insoluble
Hazards
Safety data sheet [1]
NFPA 704
0
1
0
US health exposure limits (NIOSH):
PEL (Permissible)
TWA 1 mg/m3[1]
REL (Recommended)
TWA 0.5 mg/m3[1]
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).
 YesY  (: YesY/N?)

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

Contents

  • Preparation 1
  • Properties 2
  • Health effects 3
  • References 4

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.[2] 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.

References

  1. ^ a b c
  2. ^ http://www.espi-metals.com/msds's/chromiumsulfide.pdf


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