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Sodium Tripolyphosphate (STPP) is an inorganic compound. It is a component of many domestic and industrial products because of its chelating, emulsifying and preservative properties.
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The main use of STPP is in the manufacture of commercial detergents, where it serves as a water softener. In food, STPP is a preservative for seafood, meats, poultry, and animal feeds. It is also used as an emulsifier and to retain moisture. Other uses include ceramics, leather tanning , anticaking, setting retarders, flame retardants, paper, anticorrosion pigments, textiles, rubber manufacture, fermentation, antifreeze.
Sodium Formate, HCOONa, is the sodium salt of formic acid, and it usually occurs as a white deliquescent powder.
Sodium Metabisulfite is an inorganic compound used as a disinfectant and preservative agent.
Sodium Sulfate, also known as sulfate of soda, is an inorganic compound with the formula Na2SO4 as well as several related hydrates.