Products Ceramic Industry Sodium tripolyphosphate

Product Information - Sodium tripolyphosphate


Sodium tripolyphosphate (STPP) is an inorganic compound, component of many domestic and industrial products because of its chelating, emulsifying and preservative properties.
Storage conditions: Store in dry, cool and ventilated area. Avoid direct sunlight.
Shelf life: 2 years
Appearance: White, slightly hygroscopic granules or powder, freely soluble in water, insoluble in ethanol.
Packing: 25 kg kraft paper bags


Cyclic Phosphates: ≤ 2%
Arsenic: ≤ 3 ppm
Lead: ≤ 3 ppm
Haevy Metals (as Pb): ≤ 10 ppm
Fluoride: ≤ 10 ppm
Loss on drying: ≤ 0,5%
Assay: ≥ 85%
pH value: 9,5 - 9,9


Major production of STPP is used in 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.


Possehl Erzkontor GmbH & Co. KG
Beckergrube 38-52
23552 Lübeck

Phone:  +49 - (0) 451 - 148 0
Fax:  +49 - (0) 451 - 148 355