Sodium Acid Pyrophosphate ( SAPP)
Molecular Formula:  Na2H2P2O7
Molecular weight:  221.95
Property: white powder granular or powder, soluble in water, acidic property appeared in aqueous solution.
Specifications ( GB10620-89)
Purity:    95% min
PH:3.5-4.5
Water insolubles:1.0% max
Heavy metals( as Pb): 0.001% max
As:0.0003% max
F:0.005% max
Uses:
In food industry, It can be used as buffer, leaven, modifier, emulsifier, nutrient and canning preservative.
Packing:   in 25kgs net plastic woven bags with PE inner bags.