Sodium tripolyphosphate (STPP) is produced by the thermal condensation of a mixture of monosodium and disodium phosphates at approximately 500 degrees Celsius. It is one of the most widely used food-grade phosphates globally, valued for its strong chelating, dispersing, and water-binding properties.
In meat and seafood processing, STPP dramatically improves water-holding capacity, tenderness, and yield by solubilizing myofibrillar proteins. It is also used as an emulsifying salt in processed cheese and as a stabilizer in canned products. STPP is available in both anhydrous (Phase I and Phase II) forms, with Phase II being preferred for most food applications due to its faster hydration rate.
