Industrial Grade Na5P3O10 94. 0%Min P2O5 57. 0%Min Water Insoluble Matter 0. 15%Max Iron(Fe) 0. 015%Max PH value (1% water solution) 9. 2-10. 0 Whiteness 92%Min Ignition loss 1. 0 Density (g/cm3) 0. 35-0. 9 Phase I 10-30 Food Grade Na5P3O10 94. 0%Min P2O5 57. 0%Min Water Insoluble Matter 0. 04%Max Iron(Fe) 0. 006%Max PH value (1% water solution) 9. 5-10. 0 Heavy Metal (as Pb) 0. 001%Max Arsenic (As) 0. 0003%Max Fluoride (F) 0. 003%Max Whiteness 92%Min Density (g/cm3) 0. 35-0. 9 Phase I 10-30