... , and poultry process.3, Specifications: 1. Industrial grade Main content, %; 94.0 P2O5%≥ 57.0 Water insoluble %; 0.1 Iron, as ... solution 9.2-10.0 2. Food grade Main content, %: 94.0 P2O5%; 57.0 Water insoluble %; 0.05 Iron, as ... 1% water solution 9.5-10.0 Heavy metal, as Pb %; 0.001 Arsenic, as As, %; 0.0003 Fluoride, as F ... pile up in the open air. Good quality Sodium Tripolyphosphate(94.0% min)