Sodium pyrophosphate is an inorganic compound with the chemical formula Na4P2O7. It is a white crystalline powder that easily absorbs moisture in the air and deliquesces. It is soluble in water and insoluble in ethanol and other organic solvents. It has strong complexing ability with Cu2+, Fe3+, Mn2+ and other metal ions. The aqueous solution is still stable below 70ºC. It will be hydrolyzed into disodium hydrogen phosphate when boiled.
1. Used in the food industry as food quality improver, PH regulator, metal ion chelating agent, emulsifying dispersant, adhesive, etc. Food-grade sodium pyrophosphate is used in the production of soy sauce and juice. Food-grade sodium pyrophosphate can improve the color of soy sauce and juice, making the color brighter.
2. Food-grade sodium pyrophosphate plays a great role in the stability of the product, and has the effects of increasing elasticity, improving flavor and antioxidant effects. It is often used in meat products such as enema and Western-style ham, and is often mixed with sodium tripolyphosphate.
In addition to the function of softening water, sodium pyrophosphate can also redissolve insoluble salts of calcium and magnesium. For example, in clothing fibers, dirt formed by insoluble calcium soap or other metal soaps can be mixed with it. It can redissolve it and improve decontamination. ability. In addition, sodium pyrophosphate has anti-flocculation effect and emulsifies oil, which is called peptizing property. It can also further reduce the surface tension and interfacial tension of the surfactant solution and play a role in washing.
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