Chromium(III) sulfide is the inorganic compound with the formula Cr2S3. It is a brown-black solid. Chromium sulfides are usually nonstoichiometric compounds, with formulas ranging from CrS to Cr0.67S (corresponding to Cr2S3).
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ECHA InfoCard | 100.031.477 |
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PubChem CID
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CompTox Dashboard (EPA)
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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 | |
+2390.0·10−6 cm3/mol | |
Hazards | |
NFPA 704 (fire diamond) | |
NIOSH (US health exposure limits): | |
PEL (Permissible)
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TWA 1 mg/m3[1] |
REL (Recommended)
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TWA 0.5 mg/m3[1] |
IDLH (Immediate danger)
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250 mg/m3[1] |
Safety data sheet (SDS) | [1] |
Related compounds | |
Other anions
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Chromium(III) oxide Chromium(III) telluride |
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
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Chromium(III) sulfide can be prepared through the reaction of a stoichiometric mixture of the elements at 1000 °C[2]
It is a solid that is insoluble in water. According to X-ray crystallography, its structure is a combination of that of nickel arsenide (1:1 stoichiometry) and Cd(OH)2 (1:2 stoichiometry). Some metal-metal bonding is indicated by the short Cr-Cr distance of 2.78 Å.[3]