Potassium pentasulfide

Potassium pentasulfide
Names
	Other names Dipotassium pentasulfide, dipotassium sulphide, potassium polysulfide
Identifiers
CAS Number	12136-50-4 ;
3D model (JSmol)	Interactive image;
CompTox Dashboard (EPA)	DTXSID601311032 ;
	InChI InChI=1S/2K.H2S5/c;;1-3-5-4-2/h;;1-2H/q2*+1;/p-2 Key: HXTWSRHHRRWRDG-UHFFFAOYSA-L;
	SMILES [K+].[K+].[S-]SSS[S-];
Properties
Chemical formula	K2S5
Molar mass	238.50 g·mol−1
Appearance	red-orange prisms
Structure
Crystal structure	orthorhombic
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Potassium pentasulfide is the inorganic compound with the formula K₂S₅. It is a red-orange solid that dissolves in water. The salt decomposes rapidly in air. It is one of several polysulfide salts with the general formula M₂S_n, where M = Li, Na, K and n = 2, 3, 4, 5, 6. The polysulfide salts of potassium and sodium are similar.