Copper monosulfide

Copper monosulfide
Names
	IUPAC name Copper sulfide
	Other names Covellite; Copper(II) sulfide; Cupric sulfide;
Identifiers
CAS Number	1317-40-4 ;
3D model (JSmol)	Interactive image;
ChemSpider	14145 ;
ECHA InfoCard	100.013.884
EC Number	215-271-2;
PubChem CID	14831;
RTECS number	GL8912000;
UNII	KL4YU612X7 ;
CompTox Dashboard (EPA)	DTXSID601316949 DTXSID0061666, DTXSID601316949 ;
	InChI InChI=1S/Cu.S Key: BWFPGXWASODCHM-UHFFFAOYSA-N ; InChI=1/Cu.S/rCuS/c1-2 Key: BWFPGXWASODCHM-BLKBWTQCAT;
	SMILES [Cu]=S;
Properties
Chemical formula	Cu3S3
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)
Solubility in water	3.3×10−5 g/100 ml (18 °C)
Solubility product (Ksp) of CuS	6×10−37 (25 °C)
Solubility in nitric acid	soluble
Solubility in ammonium hydroxide	soluble
Magnetic susceptibility (χ)	−2.0×10−6 cm3/mol
Refractive index (nD)	1.45
Structure
Crystal structure	hexagonal
Hazards
	GHS labelling:
Pictograms
Hazard statements	H413
Precautionary statements	P273, P501
	NIOSH (US health exposure limits):
PEL (Permissible)	TWA 1 mg/m3 (as Cu)
REL (Recommended)	TWA 1 mg/m3 (as Cu)
IDLH (Immediate danger)	TWA 100 mg/m3 (as Cu)
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). verify (what is ?) Infobox references

Copper monosulfide is a chemical compound of copper and sulfur with the formula Cu₃S(S₂). It occurs in nature as the dark indigo blue mineral covellite. 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 and photovoltaics. It is a moderate conductor of electricity.