... ,Chemical Name:sorbic acid,2,4-di-ethene acid 2,Molecular Formula:C6H8O2 3,Molecular weight:112.33. Sorbic acid and its mineral salts ... , such as sodium sorbate, potassium sorbate and calcium sorbate, are antimicrobial agents ... the acid form because they are more soluble in water. The optimal pH for the antimicrobial activity is below pH 6.5 and ...