Sodium acid pyrophosphate I. Chemical Name: Sodium Acid Pyrophosphate(SAPP) Formula:Na2H2P2O7 II. Molecular weight: 221.94 â?¢. Properties: White crystal or power, soluble in water, acidic property appeared in aqueous solution. IV. Specifications: FCC-V V. Application: It acts as a buffer,leaven,modifier, emulsifier, nutrient and canning preservative in foods. â?¥. Packing: In 25kgs net paper or plastic woven bags. â?¦. Storage and Transport: It should be stored in a dry, ventilative and clean warehouseï¼?kept away from moisture and hotï¼? Furthermore, it should be stored separately from poisonous substances.