Bismuth subcarbonate may be harmful if swallowed.

Bismuth subcarbonate occurs naturally as the mineral bismutite.

In modern medicine, bismuth subcarbonate has been made into nanotube arrays that exhibit antibacterial properties.

Bismutite or bismuthite is a bismuth carbonate mineral with formula Bi(CO)O (bismuth subcarbonate).

Bismuth subcarbonate BiO(CO), sometimes written (BiO)CO is a chemical compound of bismuth containing both oxide and carbonate anions.

Nowadays, however, bismuth trioxide or bismuth subcarbonate are commonly used as more environmentally friendly substitutes for lead compounds to achieve the effect, and its occurrence in fireworks displays has since become much more common.