Disodium diphosphate

Product Description

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.
Guaranteed Technical Specifications :
Specification Industrial grade Food Grade
Appearance White powder White powder
Assay(as Na2H2P2O7)% 95.0  95.0
P2O5% 63.0-64.0 63.0-64.0
PH Value  3.5-4.5  3.5-4.5
Water Insoluble % 1.0  1.0
Fluoride (as F) %   0.005
Heavy Metals (as Pb) %   0.001
Arsenic (As)%   0.0003
Loss on ignition(105) % 0.5 0.5

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 25 kg,50kg,1000kg net bags, store at a cool, dry and well ventilated place.