Sodium Tripolyphosphate 94% (STPP)

CAS No.: 7758-29-4

Molecular Formula:Na₅P₃O₁₀ Molecular Weight： 367.86

Structural Formula:

Properties:

STPP is white microdot powder with luster with melting point at 622℃. STPP is easily soluble in water, with remarkable chelating ability to some metal ions such as Ca2+, Mg2+. STPP can soften hard water, change suspension into solution.

Specifications:

Items	Index
Main content %≥	94.0
P₂O₅ %≥	57.0
Water insoluble %≤	0.1
Iron, as Fe %≤	0.015
pH of 1% water solution	9.2-10.0

Usage:

STPP is used as main auxiliary of synthetic wash, soap synergistic agent, water softener, leather pre-tanning agent, dye auxiliary agent, and dispersant of suspension such as paint, kaolin, magnesium oxide, calcium carbonate drilling mud. STPP could also be used in preservative agent for paper making, organic synthesis catalyzer. STPP is also used in epuration of petroleum product, gum latex storage, as dispersant, solvent in metal industry and pharmaceutical industry.

Packing&Storage:

Plastic-woven sack with polythene inner bag; Net weight 25kg, 50kg or 1000kg; Keep away from water or moisture, do not pile up in the open air.

Keywords:

Sodium Tripolyphosphate; Pentasodium Triphosphate; Sodium Triphosphate; STPP