1. Appearance: white granular or powder
2. Industrial sodium tripolyphosphate should conform to the requirements of the table below (GB********4)
Project indicators
Classy article
Whiteness, % *0.0 or higher
Phosphorus pentoxide (P2O5), % *7.0 or higher
Sodium tripolyphosphate (Na5P3O*0) content, % *5.0 or higher
Water content, % 0.*0 or less
Iron (Fe), % 0.**5 or less
PH 9.2 *0.0 (1% solution)
Through the particle size of 1.*0 mm test sieve sieve rate of not less than *5%