English | Chinese | HG2919—2000 | FCC1996 |
Content≥ | 含量 | 98.0%--103.0% | 98.0%--103.0% |
PH(10/Lsolution) | PH值(10g/L溶液) | 4.2—4.6 | ------ |
Water insoluble | 水不溶物≤ | 0.2% | 0.2% |
Heavy metal(As Pb) | 重金属(以PB计)≤ | 0.001% | 10mg/kg |
Arsenic | 砷(以As计)≤ | 0.0003% | 3mg/kg |
Fluorides | 氟化物(以F计)≤ | 0.005% | 0.005% |
loss on drying Anhydrous Monohydrous Dihydrous | 干燥减量 无水物 一水物 二水物 | 2.0% 10.0%--15.0% 20.0—25.0% | 2.0% 10.0%--15.0% 20.0—25.0% |