Sodium tripolyphosphate(stpp), an organic compound with the formula Na5P3O10 is the sodium salt of the polyphosphate penta-anion. STPP chemical is a colourless salt, which exists both in anhydrous form and hexahydrate form.
The majority of STPP is consumed of commercial detergents. It is seen as the builder of detergents, which has strong chelating effect on metals ions and can promote the emulsification of fat and disperse solid dirt. Used as food additive, it is the preservative for seafood, meats, poultry and animal feeds, as well as emulsifiers and water retention agents. In water treatment industry, it can be used as water softener. In addition, it can also be used in many other industrial fields, such as, petroleum, metallurgy, mining, papermaking, etc…