... .CAS:5578-16-9 3.25 kg PP woven bag Sodium Acid Pyrophosphate (SAPP):CAS No.: 5578-16-9Molecular Formula: Na2H2P2O7 ItemValueUnitIndexContent ... , quality improver in food industry. Applied to acid component of synthetic swelling agent, such as, bread, cake etc. Sodium Acid Pyrophosphate 95% min