Bismuth Subcarbonate BP

Bismuth subcarbonate (BiO)2CO3, sometimes written Bi2O2(CO3) is a chemical compound of bismuth containing both oxide and carbonate anions. Bismuth is in the +3 oxidation state. Bismuth subcarbonate occurs naturally as the mineral bismutite. Its structure consists of Bi-O layers and CO3 layers and is related to kettnerite, CaBi (CO3) OF. It is light-sensitive.


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


General Specifications:

Test Specification
Characters It occurs as a white or almost white powder

Test (A)

Test (B)


Gives reactions of carbonates

Gives reactions of bismuth

Solubility Practically insoluble in water and in ethanol (96 per cent). It dissolves with effervescence in mineral acids.
Appearance of solution Solution S is not more opalescent than reference suspension II and is colorless
Chlorides Not more than 500 ppm
Nitrates Not more than 0.4%
Alkali and magnesium earth metals Not more than 1.0%
Arsenic Not more than 5 ppm
Copper Not more than 50 ppm
Lead Not more than 20 ppm
Silver Not more than 25 ppm
Loss on drying Not more than 1.0%
Assay 80.0 % to 82.5 % of Bi (dried substance).


Shelf life, Storage and Packing

It should be stored in a segregated area in a cool and ventilated place away from combustible materials. Keep in a tightly closed container, sealed until ready for use. It is packed in 25kg or 50kg HDPE bags or drums as required.


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We observe WHO Good manufacturing practice and Good laboratory practice.

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