Sodium Acid Pyrophosphate - Na2H2P2O7

Properties: White powder or granular; Bulk density 1.86g/cm3; Soluble in water and insoluble in ethanol; If its aqueous solution is heated together with diluted inorganic acid, it will be hydrolyzed into phosphoric acid; It is hydroscopic, and when absorbing humidity it will become into a product with hexa-hydrates; If it is heated at a temperature above 220℃, it will be decomposed into sodium meta phosphate.

Technical specifications:
(1)Appearance: White powder or white granular
(2)Main content: 95.0%min
(3)P2O5: 63.0-64.0%min
(4)pH of 1% water solution: 3.5-4.5
(5)Water insoluble: 1.0%max
(6)Heavy metal, as Pb: 0.001%max
(7)Arsenic, as As: 0.0003%max
(8)Fluoride , as F: 0.005%max
(9)Loss on ignition(105℃): 0.5%max