Antimony Potassium Oxalate is a derivative of Oxalic Acid. Antimony Potassium Oxalate is freely soluble in water. Antimony Potassium Oxalate is a crystalline powder. It should be stored in tightly closed containers in a Room Temperature. CAUTION POISONOUS. Antimony Potassium Oxalate is used in Dyeing & Printing applications.