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E –
451 (i)
- Molecular formula : Na5P3O10
- Molecular weight : 367,86
- Cas Number : 7758-29-4
Uses
It is used in various applications such as a
preservative
for seafood, meats, poultry and pet foods. It is also used in
toothpaste and
as a builder in
soaps and
detergents,
improving their cleansing ability. The United States
Food and Drug
Administration lists STPP as "generally recognized as safe", along
with
salt,
vinegar, and
baking powder.
STPP is a solid
inorganic
compound used in a large variety of household cleaning products, mainly as a
builder, but
also in human
foodstuffs,
animal feeds,
industrial cleaning processes and
ceramics
manufacture. STPP is widely used in regular and compact laundry
detergents and
automatic dishwashing detergents (in powder, liquid, gel and/or tablet form),
toilet cleaners, surface cleaners, and coffee urn cleaners. It also provides a
number of chemical functions including: sequestration of "water
hardness", enabling
surfactants to
function effectively;
pH
buffering;
dirt
emulsification
and prevention of deposition;
hydrolysis of
grease; and dissolving-dispersing dirt particles.
Food Applications
In foods, STPP is used to retain moisture. Many
governments regulate the quantities allowed in foods, as it can substantially
increase the sale weight of seafood in particular.
Many people find STPP to add an unpleasant taste to food,
particularly delicate seafood. The taste tends to be slightly sharp and soapy
and is particularly detectable in mild-tasting foods. The increased water
holding properties can also lead to a more diluted flavor in the food.
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