The chemical Potassium Sulfate has a designated molecular formula of K2O4S and a molecular weight of 174.253 g/mol. Synonyms may include: Arcanum duplicatum, Caswell No. 702, Dipotassium sulfate, EINECS 231-915-5, EINECS 233-558-0, EPA Pesticide Chemical Code 005603, HSDB 5047, Kalium sulphuricum, Potassium sulfate (K2(SO4)), Potassium sulphate, Sal Polychrestum, Sulfuric acid (ChemID).