Item | Pharm grade | Food grade | Tech grade |
Assay | 99.0%min. | 99.0%min | 58%MIN |
PH | 7.5 – 9.0 | 7.5 – 9.0 | 7.5 – 9.0 |
Fe | 0.0005%MAX. | 0.005%MAX | 0.003%MAX. |
Sulfate (SO4) | 0.01%MAX | 0.01%MAX | 0.02%MAX |
Chloride (Cl) | 0.005%MAX. | 0.005%MAX. | 0.05%MAX. |
Heavy metals (Pb) | 0.002%MAX. | 0.002%MAX. | 0.002%MAX. |