Sodium Acid Pyrophosphate(SAPP)
Chemical formula : Na2H2P2O7
Molecular weight: 221.95
CAS Number: 7758-16-9
Properties:
White powder or granular;Relative 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.
Uses:
As a leavening agent it is applied to roast foodstuffs to control the fermentation speed; When applied to instant noodles, it can shorten water resetting time and avoid stickiness and mushiness of the noodles; When applied to crackers or cakes, it may shorten fermentation time, lower the breakage, make the porous space in good order and therefore lengthen the shelf life.
Packing and storage:
Packed in 25kg,50kg,1000kgnet bage,store at a cool, dry and well ventilated place.

1 Appearance White powder
2 Assay(as Na2H2P2O7)%? 95.0
3 P2O5%? 63.0-64.0
4 PH Value 3.5-4.5
5 Water Insoluble %? 1.0
6 Fluoride (as F) % ? 0.005
7 Heavy Metals (as Pb) % ? 0.001
8 Arsenic (As)% ? 0.0003
9 Loss on ignition(105��) %? 0.5