Item | Industrial Grade | ||
Superior grade | First grade | Second grade | |
Na3PO4·12H2O, %≥ | 98.5 | 98.0 | 95.0 |
Alkalinity of methyl orange (in Na2O), % | 16.5-19.0 | 16.0-19.0 | 15.5-19.0 |
Water insoluble, %≤ | 0.05 | 0.10 | 0.30 |
Sulphate(in SO4), %≤ | 0.05 | 0.50 | 0.80 |
Chloride ( in Cl), %≤ | 0.30 | 0.40 | 0.50 |
PH Value (10g/L Solution) | 11.5~12.5 | ||
Iron(Fe), %≤ | 0.01 | 0.01 | 0.01 |
Arsenic(As), %≤ | 0.005 | 0.005 | 0.005 |