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Sodium Tripolyphosphate (STPP)

CAS No.: 7758-29-4
EINECS No.: 231-838-7
Properties: White particle or powder, appearant density 0.35-0.9g/cm³, melting point 622℃. Easily soluble in water, aqueous solution is alkali. Hydrolyze to orthophosphate in water, complaxing with calcium, magnesium, iron and other metal ions and generate soluble complex.
Usage: Used as one of the main auxiliaries for synthetic detergent, synergist for soap; water softener, tanning agent for leather making, auxiliary for dyeing; As an effective dispersion agent for suspension solutions of coatings, kaolin, magnesium oxide, calcium carbonate and drilling mud etc.; As an oil contamination resistance agent in paper production.
In food industry it is used as quality improver in the process of canned food, fruit juice drinks, foodstuffs from milk or soybeans. It may also serves as a softener or densifier in foodstuff industry.
Packing: 25kg bag or as customer request

Specification:


Tech Grade

Food Grade

Main content %

94.0

95.0

P2O5 %

57.0

57.0

PH Value (1% water solution)

9.2-10.0

9.4-10.0

Iron (Fe) %

0.015

---

Heavy Metal (as Pb) %

--

0.001

Arsenic (As) %

--

0.0001

Fluoride (F) %

--

0.001

Cd %

--

0.0001

Hg %

--

0.0001

Water Insoluble Matter %

0.15

0.05

whiteness %

90

90

Bulk Density (g/cm3)

0.6-0.9

0.6-0.9

Storage stability: Qualified