Sodium Tripolyphosphate (STPP) 1)Purity:94%,95%. 2)Form: ... 3)H.S Code:2835319000. 4)Package:25kgs/bag Sodium Tripolyphosphate (STPP)1.Chemical and Physical Properties:Molecular Formula: ... agent, and dispersant of suspension such as paint, kaolin, magnesium oxide, calcium carbonate drilling mud, preservative agent for paper making ... at a cool, dry and well ventilated place. Sodium Tripolyphosphate