Sodium Acid Pyrophosphate Quality standard:( FCC-HG2928-1999) 1. Chemical name:Disodium Dihydrogen PyrophosphateSodium Acid Pyrophosphate2. M. F.: Na2H2P2O73. M. W. ... in water. Hydrolyzes to orthophosphate on heating in acid medium. Hygroscopic, forms hexahydrate in damp air. Decomposes ... agent, quality improver in food industry. Applied to acid component of synthetic swelling agent, such as, bread, ...