Copper monosulfide
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Copper monosulfide is a chemical compound of copper and sulfur. It was initially thought to occur in nature as the dark indigo blue mineral covellite. However, it was later shown to be rather a cuprous compound, formula Cu+3S(S2).[4] CuS is a moderate conductor of electricity.[5] A black colloidal precipitate of CuS is formed when hydrogen sulfide, H2S, is bubbled through solutions of Cu(II) salts.[6] It is one of a number of binary compounds of copper and sulfur (see copper sulfide for an overview of this subject), and has attracted interest because of its potential uses in catalysis[7] and photovoltaics.[8]
Quick Facts Names, Identifiers ...
Names | |
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IUPAC name
Copper sulfide | |
Other names | |
Identifiers | |
3D model (JSmol) |
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ChemSpider |
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ECHA InfoCard | 100.013.884 |
EC Number |
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PubChem CID |
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RTECS number |
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UNII | |
CompTox Dashboard (EPA) |
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Properties | |
CuS | |
Molar mass | 95.611 g/mol |
Appearance | black powder or lumps |
Density | 4.76 g/cm3 |
Melting point | above 500 °C (932 °F; 773 K) (decomposes)[1] |
0.000033 g/100 ml (18 °C) | |
Solubility product (Ksp) |
6 x 10−37[2] |
Solubility | soluble in HNO3, NH4OH, KCN insoluble in HCl, H2SO4 |
-2.0·10−6 cm3/mol | |
Refractive index (nD) |
1.45 |
Structure | |
hexagonal | |
Hazards | |
GHS labelling: | |
H413 | |
P273, P501 | |
NIOSH (US health exposure limits): | |
PEL (Permissible) |
TWA 1 mg/m3 (as Cu)[3] |
REL (Recommended) |
TWA 1 mg/m3 (as Cu)[3] |
IDLH (Immediate danger) |
TWA 100 mg/m3 (as Cu)[3] |
Related compounds | |
Other anions |
Copper(II) oxide |
Other cations |
zinc sulfide |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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