... , 3.White odorless powder 4.Over 50 years factory Tech Grade Sodium Tripolyphosphate (STPP) SpecificationTech grade Main content, %,≥96.094.090.0 P2O5 %≥57. ... F %≤--- Chloride, as Cl %≤---1. Product Description:1).Product: STPP; Sodium Tripolyphosphate 2).Chemical formula: Na5P3O103).Standard executed: HG/T2837-1997 4 ... liner; Stored in ventilated and dry place. Teach Grade Sodium Tripolyphosphate