Calcium Oxalate is a derivative of Oxalic Acid. Calcium Oxalate is practically insoluble in water and converts to the oxide when heated (calcined). Calcium Oxalate is a White odourless powder. Calcium Oxalate decomposes at the temperatures above 200oC. It should be stored in tightly closed containers in a Room Temperature. Calcium Oxalate is used in Ceramic Glazes & as a carrier for separation of Rare Earth Metals.