Bismuth subcarbonate

Химические свойства

White Fine powder

Физические свойства

White powder; density 6.86 g/cm³; insoluble in water and alcohol; soluble in mineral acids.

Использование

Bismuth subcarbonate [(BiO)2CO3] is used to make other bismuth compounds, cosmetics, enamel, and ceramic glazes. Its major use is as an opaque substance placed in the digestive tract to show up on X-rays.

Подготовка

Bismuth oxycarbonate is prepared by adding sodium carbonate to a suspension of bismuth subnitrate in water.
BiONO₃ + Na₂CO₃ → (BiO)₂CO₃ + 2NaNO₃
(BiO)₂CO₃also may be prepared by adding ammonium carbonate to a solution of bismuth salt. The nature of the product in the preparative processes depends on the nature of the subnitrate or the bismuth salt used, the amount of water and the temperature.