... White odorless powder 4.Over 50 years factory Sodium Tripolyphosphate (STPP) Industrial Grade SpecificationIndustrial grade Main content, %,≥96.094.090.0 P2O5 %≥57. ... temperature agglomerant, detergent and soil analytical chemical reagent; 2). Food grade: Mainly used as additive agent, pH adjusting agent, fermenting ... liner; Stored in ventilated and dry place. Sodium Tripolyphosphate industrial grade