|White Fine Powder
|Fully miscible in water.
|Cool Dry Place
Synonyms SAPP; Disodium dihydrogen pyrophosphate; Diphosphoric acid disodium salt; Disodium dihydrogen pyrophosphate
Molecular Formula Na2H2P2O7
Molecular Weight 221.94
CAS Number 7758-16-9
It is a white, water-soluble solid that serves as a buffering and chelating agent, with many applications in the food industry. When crystallised from water, it forms a hexahydrate, but it dehydrates above room temperature. Pyrophosphate is a polyvalent anion with a high affinity for polyvalent cations, e.g. Ca2+.
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.