MF: K2S MW: 110.26 POTASSIUM SULFIDE (CAS No.: 1312-73-8 ) POTASSIUM SULFIDE Basic information MeltingPoint:840 CHazardSymbols:Flammable, dangerous fire risk, may ignite spontaneously, explosive in form of dust or powder.BoilingPoint:°Cat760mmHgFormula:K2SDensity:g/cm3FlashPoint:°CMolecularWeight:110.26ChemUse:Reagent in analytical chemistry, depilatory, medicine.