Specifications | GB29209-2012 | FCCVII | |
Assay ( NaSO 4 , on the dried basis ), w /% | 99.0-100.5 | 99.0-100.5 | |
Lead , mg/kg ≤ | 2 | 2 | |
Selenium, mg/kg ≤ | 30 | 30 | |
Arsenic, mg/kg ≤ | 3 | ------- | |
Loss on Drying ,w/% | Anhydrous ≤ | 1.0 | 1.0 |
Decahydrate | 51.0-57.0 | 51.0-57.0 |