Hydrogen disulfide

Hydrogen disulfide
	Sulfur, S; Hydrogen, H
Names
	IUPAC name Dihydrogen disulfide
	Systematic IUPAC name Disulfane
	Other names Dithioperoxol; Hydrogen disulphide; Hydrogen persulfide; Hydrogen persulphide; Thiosulfenic acid;
Identifiers
CAS Number	13465-07-1 ;
3D model (JSmol)	Interactive image;
ChEBI	CHEBI:33114 ;
ChemSpider	97274 ;
PubChem CID	108196;
CompTox Dashboard (EPA)	DTXSID10158844 ;
	InChI InChI=1S/H2S2/c1-2/h1-2H Key: BWGNESOTFCXPMA-UHFFFAOYSA-N ; InChI=1/H2S2/c1-2/h1-2H Key: BWGNESOTFCXPMA-UHFFFAOYAV;
	SMILES SS;
Properties
Chemical formula	H2S2
Molar mass	66.14 g·mol−1
Appearance	Pale yellow liquid
Density	1.334 g/cm3
Melting point	−89.6 °C (−129.3 °F; 183.6 K)
Boiling point	70.7 °C (159.3 °F; 343.8 K)
Hazards
Flash point	flammable
Related compounds
Related compounds	Hydrogen sulfide; Hydrogen peroxide; Hydrogen diselenide; Hydrogen ditelluride; Disulfur dichloride;
	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

Hydrogen disulfide is the inorganic compound with the formula H₂S₂. This hydrogen chalcogenide is a pale yellow volatile liquid with a camphor-like odor. It decomposes readily to hydrogen sulfide (H₂S) and elemental sulfur.