STPP tech / food Grade is one of our strong products, our exporting quantity is 1200mts per month to many countries. It is used in detergent builder: soap synergistic agent, as soft syner agent, dye auxiliary agent, water softener, magnesium oxide,leather pre-tanning agent and calcium carbonate drilling mud,dispersant of suspension such as paint, kaolin, preservative agent for paper making, organic synthesis catalyzer, petizing agents, and to provide alkalinity. Usd in petroleum induatry as peptizing and deflocculation agents in oil well drilling muds. The below is our full details of STPP: Sodium Tripolyphosphate NoSpecificationIndustrial gradeFood grade1Main content %≥94.094.02P2O5 %≥57.057.03Water insoluble %≤0.10.054Iron, as Fe %≤0.0150.015pH of 1% water solution9.2-10.09.5-10.06Heavy metal, as Pb%≤-0.0017Arsenic, as As %≤-0.00038Fluoride ,as F %≤-0.0039Chloride, as Cl %≤-0.025 Packaging: Plastic-woven sack with polythene inner bag; Net weight 25kg, 50kg or 1000kg If you are interested in our products, please do not hesitate to contact with us, we'll offer you our best price with high quality! We are looking forward to hearing from you! Best regards Krissy