What is the role of sodium pyrophosphate in food additives？

Used in food processing as quality improver, emulsifying and dispersing agent, buffering agent, chelating agent, etc. It has the general properties of condensed phosphate, has obvious chelating and dispersing effects, and can resist flocculation; it can prevent fat oxidation and increase the viscosity of casein. . When the PH value is high, it has the effect of inhibiting food spoilage and fermentation. Mainly used in meat and aquatic product processing, can improve water holding capacity, keep meat fresh and tender, and stabilize natural pigments. It can also be used in starch manufacturing, etc., and is often used in combination with other condensed phosphates. Sodium pyrophosphate is generally added 0.5-3‰ in food processing, and the maximum addition amount in aquatic product processing is 3%.