Bismuth Subcarbonate
Molecular Formula:(BiO)2CO3 Molecular Weight:509.97g/mol CAS NO.: 5892-10-4
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Specification
Characters
It occurs as a white or almost white powder
IdentificationTest (A)Test (B)
Gives reactions of carbonatesGives 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).