
No Specifications Industrial Grade Food Grade 1 Main content %≥ 94.0 94.0 2 P2O5 %≥ 57.0 57.0 3 Water insoluble %≤ 0.1 0.05 4 Iron, as Fe %≤ 0.015 0.01 5 pH of 1% water solution 9.2-10.0 9.5-10.0 6 Heavy metal, as Pb %≤ - 0.001 7 Arsenic, as As %≤ - 0.0003 8 Fluoride ,as F %≤ - 0.003 9 Chloride, as Cl % ≤ - 0.025




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