1.Chemical name:Disodium Dihydrogen Pyrophosphate、Sodium Acid Pyrophosphate 2.M. F.: Na2H2P2O7 3.M. W. : 221.94 4.Physical properties: Monoclinic, white crystalline powder. Density 1.86. Practically insoluble in alcohol, soluble in water. Hydrolyzes to orthophosphate on heating in acid medium. Hygroscopic, forms hexahydrate in damp air. Decomposes to metaphosphate at above 220℃ 5.Quality standard:( FCC-Ⅳ、HG2928-1999) 6.Packing: It is packed with ployethylene bags as line-r , and a woven bag as the outer layer. The net weight of each bag is 25kg. 7.Storage and transport: Stored in a dry and ventilative warehouse; Keep away from moisture moisture and poisonous substances. Handled with care.