| 指標名稱 | 醫(yī)用級 | 優(yōu)等品 |
| 外觀 | 白色細顆粒結(jié)晶,無可見雜質(zhì) | |
| 鹽酸羥胺質(zhì)量分數(shù)(%) ≥ | 99.3 | 99.0 |
| 硫酸鹽( 以SO?²¯計) (%) ≤ | 0.0005 | 0.005 |
| 重金屬(以Pb計)質(zhì)量分數(shù)/% ≤ | 0.0001 | 0.0003 |
| 鐵(以Fe計)質(zhì)量分數(shù)/% ≤ | 0.0002 | 0.0003 |
| 干燥減量質(zhì)量分數(shù)/% ≤ | 0.30 | 0.30 |
| pH值(50g/L,25℃) | 2.5~3.5 | — |
| 澄清度試驗,號 ≤ | 2 | — |
| 砷(以As計)質(zhì)量分數(shù)/% ≤ | 0.0001 | — |