Aluminium sulfide

Aluminium sulfide
Names
	Other names Aluminium sulfide
Identifiers
CAS Number	1302-81-4 [ECHA];
3D model (JSmol)	Interactive image;
ChemSpider	140154 ;
ECHA InfoCard	100.013.736
EC Number	215-109-0;
PubChem CID	16684788;
UNII	04PI6P2Z18 ;
CompTox Dashboard (EPA)	DTXSID80893235 ;
	InChI InChI=1S/2Al.3S/q2+3;3-2 Key: COOGPNLGKIHLSK-UHFFFAOYSA-N ; InChI=1/2Al.3S/q2+3;3-2 Key: COOGPNLGKIHLSK-UHFFFAOYAY;
	SMILES [Al+3].[Al+3].[S-2].[S-2].[S-2];
Properties
Chemical formula	Al2S3
Molar mass	150.158 g/mol
Appearance	gray solid
Density	2.02 g/cm3
Melting point	1,100 °C (2,010 °F; 1,370 K)
Boiling point	1,500 °C (2,730 °F; 1,770 K) sublimes
Solubility in water	decomposes
Solubility	insoluble in acetone
Structure
Crystal structure	trigonal
Thermochemistry
Heat capacity (C)	105.1 J/mol K
Std molar; entropy (S⦵298)	116.9 J/mol K
Std enthalpy of; formation (ΔfH⦵298)	−724 kJ/mol
Hazards
	GHS labelling:
Pictograms
Signal word	Danger
NFPA 704 (fire diamond)	4 0 2 W
Safety data sheet (SDS)
	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

Aluminium sulfide is a chemical compound with the formula Al₂ S₃. This colorless species has an interesting structural chemistry, existing in several forms. The material is sensitive to moisture, hydrolyzing to hydrated aluminium oxides/hydroxides. This can begin when the sulfide is exposed to the atmosphere. The hydrolysis reaction generates gaseous hydrogen sulfide (H₂S).