Tech grade Used as fire-extinguishing agent for fabric, woods, paper; as soft water agent for boilers; as food additive, and so on.
Food grade Used as boiler water softener; treatment of leather and fabrics to increase weight; flame retardant for fabrics, wood and paper in dyeing; culture medium for biochemical treatment; raw material for production of sodium pyrophosphate and other phosphates.
ITEM |
SPECIFICATION |
|
TECH GRADE |
FOOD GRADE |
|
Main content |
≥98.0 % |
≥98.0% |
PH of 1% solution |
8.8-9.2 |
9.0-9.4 |
Sulfate, as SO4 |
≤1.2 % |
≤1.2% |
Chloride, as CI |
≤0.05 % |
≤0.02% |
Fluoride, as F |
≤0.1 % |
≤0.005% |
Heavy metal, As Pb |
- |
≤0.001% |
Arsenic, as As |
- |
≤0.0003% |
Water insoluble |
≤0.10 % |
≤0.20% |