... luster, melting point at 622 o C, easily soluble in water, with remarkable chelating ability to some metal ... , and dispersant of suspension such as paint, kaolin, magnesium oxide, calcium carbonate drilling mud, preservative agent for paper ... grade Main content, %; 94.0 P2O5%≥ 57.0 Water insoluble %; 0.1 Iron, as Fe %; 0.015 pH of 1% water ... open air. 2011Hot sale Sodium Tripolyphosphate(94.0% min)