The chemical Potassium Hydroxide has a designated molecular formula of HKO and a molecular weight of 56.105 g/mol. Synonyms may include: Caswell No. 693, Caustic potash, CCRIS 6569, EINECS 215-181-3, EPA Pesticide Chemical Code 075602, HSDB 1234, Hydroxyde de potassium [French], Potash lye, Potassa, Potasse caustique [French], Potassio (idrossido di) [Italian], Potassium hydrate (ChemID).