Properties: molecular weight: 260.0024. Bismuth hydroxide. White amorphous powder. The density is 4.36g/cm3. At 100℃, it loses 1 molecule of water and becomes yellow bismuth hydroxide. Soluble in acid. Insoluble in water and alkali, easily gelatinous. It is prepared by sodium hydroxide acting on bismuth salt solution.
| Analysis item | Technical index (%) | Test results(%) |
| Bi | ≥80 | 81.56 |
| （CI） ≤ | 0.01 | 0.0043 |
| (SO4) ≤ | 0.01 | 0.003 |
| （Cu） | 0.0004 | 0.0002 |
| (Fe) | 0.0006 | 0.0005 |
| (Ag) | 0.0005 | 0.0003 |
| (Pb) | 0.0005 | 0.0003 |
| Ca） | 0.0004 | 0.0003 |
| （Na） | 0.001 | 0.0005 |
| （Cr） | 0.001 | 0.0043 |
| Nitric acid insoluble matter ≤ | 0.3 | qualified |
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