| 指标名称 | Name of index | FCC-V | E281 | |
| 外观 | APPEARANCE | White crystalline hygroscopic powder, or a fine white powder | ||
| 鉴别试验 | Identification | Pass test | Pass test | |
| 含量 | Content | % | 99.0-100.5（drying basis） | ≥99.0(105℃,2h) |
| pH值（10%水溶液） | pH (10 % aqueous solution) | -- | 7.5-10.5 | |
| 砷≤% | As | ≤mg/kg | -- | 3 |
| 碱度 | Alkalinity (as Na2CO3) | Passes test (about 0.15%) | -- | |
| 干燥失重 | Loss on drying | ≤% | 1 | 4(105℃,2h) |
| 水不溶物 | Water insoluble | ≤% | -- | 0.1 |
| 铁 | Iron | ≤mg/kg | 30 | 50 |
| 铅 | Lead | ≤mg/kg | 2 | 5 |
| 汞 | Mercury | ≤mg/kg | -- | 1 |
Su Su Wang'an No. 32070402010022