Sodium tripolyphosphate (STPP)

White powder, mainly used as synthetic detergent, water-softening agent, dispersant of drilling mud and mineral floating
Product Name: Sodium tripolyphosphate (STPP);
Other Names: Sodium triphosphate, tripoly pentasodium triphosphate
Appearance: White powder or granules.
Formula: Na5P3O10
Boiling Point: 1000 C
Melting Point: 622 C
Specific Gravity: >1.5 (water = 1)
pH: 9.2 - 10.0 (1% solution)
STTP
Items
Index
Tech. Grade
Food Grade
Na5P3O10 (%)
94%Min
95%Min
P2O5 (%)
57%Max
57%Max
Insolubles in water (%)
0.15%Max
0.15%Max
Fe (%)
0.01%Max
0.01%Max
Ph (1% solution)
9.2-10
9.5-10
Heavy Metal (As Pb) (%)
--
0.001%Max
Arsenic (As) (%)
--
0.0003%Max
Fluoride(F) (%)
--
0.003%Max
Whiteness(%)
90%Min
90%Min

Properties and uses
: White powder, mainly used as synthetic detergent, water-softening agent, dispersant of drilling mud and mineral floating, catalyst of organic synthesis.