... heating in acid medium. Hygroscopic, forms hexahydrate in damp air. Decomposes to metaphosphate at above 220 degree centigrade.5.Quality standard:( ... as rapid ferment agent, quality improver in food industry. Applied to acid component of synthetic swelling agent, such as, bread, ... cake. Builted with other phosphates can be applied to water retention of meat product, such as canned meat, cooked ...