... 2, Usage: Used as main auxiliary of synthetic wash, soap synergistic agent, water softener, leather pre-tanning agent, dye auxiliary ... kaolin, magnesium oxide, calcium carbonate drilling mud, preservative agent for paper making, organic synthesis catalyzer, and used in epuration of petroleum ... ,25kg per bag.To meet your special requirements for packing. Sodium Tripolyphosphate STPP 94% High quality