| M Formula: | Bi2O2(OH)•C10H7O |
| Properties: | |
| Brown to gray powder. Almost insoluble in water or other solvents. | |
| Derivation: | |
| By treating a solution of sodium β-naphtholate with acetic acid solution of bismuth nitrate and adding caustic soda solution to neutralize excess acid. | |
| Use: | |
| Medicine. | |