Sodium acid pyrophosphate (SAPP)

Chemical formula:Na2H2P2O7
CAS Number:7758-16-9
Standard executed:Nantional standard(Tech Grade)HG 2928-1999(Food Grade)
Packing and storage:In 25kg,50kg,1000kg net bags,store at a cool,dry and well ventilated place.
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.
Application:
Used 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.
Specifications:
(Tech Grade):
Appearance:White Powder
Main content:95% min
P2O5:63%-64% min
PH value of 15 solution:3.5-4.5
Water insoluble:1.0% max
Loss on ignition:0.5% max
(Food grade):
Aappearance: White Powder
Main content:95% min
P2O5:63%-65% min
PH value of 1% solution:3.5-4.5
Water insoluble:1.0% max
Heavy metals:15ppm max
Fluoride:50ppm max
Arsenic:3ppm max
Loss on ignition:0.5% max
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