Specification | GB29207-2012 | FCCVII |
Content ( As MgSO4) ( after ignition) w/%≥ | 99.0 | 99.5 |
Heavy metals( Pb) mg/kg ≤ | 10 | -- |
Lead(Pb) mg/kg≤ | 2 | 4 |
Selenium(Se) mg/kg≤ | 30 | 30 |
Ph value(50g/l solution) | 5.5-7.5 | -- |
Chloride (cl) w/%≤ | 0.03 | -- |
Arsenic ( As) mg/kg ≤ | 3 | -- |