Sodium triphosphate (STP, sometimes STPP or sodium tripolyphosphate or TPP) is an asleep admixture with blueprint Na5P3O10. It is the sodium alkali of the polyphosphate penta-anion, which is the conjugate abject of triphosphoric acid. It is produced on a ample calibration as a basic of abounding calm and automated products, abnormally detergents. Environmental problems associated with eutrophication are attributed to its boundless use.
Uses
The majority of Sodium Tripolyphosphate is captivated as a basic of bartering detergents. It serves as a "builder," automated abracadabra for a baptize softener. In harder baptize (water that contains top concentrations of Mg2+ and Ca2+), detergents are deactivated. Being a awful answerable chelating agent, TPP5- binds to dications deeply and prevents them from interfering with the sulfonate detergent.
STPP is a bactericide for seafood, meats, poultry, and beastly feeds. It is accepted in aliment assembly as E amount E451. In foods, STPP is acclimated to absorb moisture. Abounding governments adapt the quantities accustomed in foods, as it can essentially access the auction weight of seafood in particular.
Health effects
Polyphosphates are anatomize into simpler phosphates, which in abstinent amounts are nutritious. For example, ATP, a accompanying acquired of triphosphate, is capital for life. Thus, the toxicity of polyphosphates is low, as the everyman LD50 afterwards articulate administering is >1,000 mg/kg physique weight. Similarly, no mutagenic or baleful furnishings nor changeable furnishings accept been noted. Salts of polyphosphate anions are moderately acid to derma and close film because they are agilely alkaline.
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