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Applications & Uses of Sodium triphosphate

04/08/2016 admin

Sodium triphosphate (STP), also sodium tripolyphosphate (STPP), or tripolyphosphate (TPP),) is an inorganic compoundwith formula Na5P3O10. It is the sodium salt of the polyphosphate penta-anion, which is the conjugate base of triphosphoric acid. It is produced on a large scale as a component of many domestic and industrial products, especially detergents. Environmental problems associated with eutrophication are attributed to its widespread use.


Sodium triphosphate (STP) Used in Foods & Beverages

Sodium tripolyphosphate is used to preserve foods such as red meats, poultry, and seafood, helping them to retain their tenderness and moisture during storage and transport. Pet food and animal feed can also be treated with it, serving the same general purpose as it does in human food. STPP also has been used to help preserve the quality of drinks such as milk and fruit juices.

Because sodium tripolyphosphate can improve the appearance of seafood like shrimp andscallops, there is some concern that unscrupulous salespeople may sell products that are not fresh to consumers who cannot see the signs that the items have started to go bad. Although it cannot be used specifically for this purpose, this chemical also holds in water, making the seafood heavier and therefore more expensive. Some food quality experts recommend asking a fishmonger or other salesperson for seafood that has not been treated with this chemical. Some stores will mark products that have not been exposed to STPP as "dry."


Sodium triphosphate (STP) Used in Other Applications

STPP's chemical characteristics are used in paint to keep the pigments evenly dispersed, and in ceramics to evenly distribute clay. Paper mills use it as an oil-resistant agent when coating paper, and it may also be used as a tanning agent for leather. Due to its cleaning action, it may also be an ingredient in toothpaste.