Bismuth Subnitrate USP

Abstract:Bismuth Subnitrate USP
Bismuth oxynitrate is the name applied to a number of compounds that contain Bi3+, nitrate ions and oxide ions and which can be considered as compounds formed from Bi2O3, N2O5 and H2O. Other names for bismuth oxynitrate include bismuth subnitrate and bismuthyl nitrate. In older texts bismuth oxynitrate is often simply described as BiONO3


Used as a white pigment, in beauty care, and as a gentle disinfectant for internal and external use


Chemical Name: Bismuth Subnitrate
Mol. Formula: Bi5O(OH)9(NO3)4
Mol. Weight: 1461.99 g/mol
CAS No.: 1304-85-4


General Specifications:

Test Specification
Characters It occurs as White, slightly hygroscopic powder




(a)It responds to the test for Bismuth and for Nitrate

Solubility Practically insoluble in water and in alcohol. Readily dissolved by hydrochloric acid or by nitric acid.
Loss on drying Not more than 3.0% of its weight.
Carbonate Specified Test.
Chlorides Maximum 0.035%
Sulfates Specified Test. No Turbidity is produced immediately.
Limits of  Ammonium Salts Specified Test. The vapor does not turn moistened red litmus paper blue.
Arsenic Maximum 8 ppm
Copper Specified Test. The liquid does not exhibit a bluish color
Lead Specified Test. The liquid does not become cloudy
Silver Specified Test. No precipitate is formed that is insoluble in a slight excess of hydrochloric acid, but that is soluble in 6 N ammonium hydroxide.
Alkalies & Alkaline earths Not more than 0.5%
Residual Solvents Meets the requirements
Assay Not less than 79.0% of Bismuth Trioxide (Bi2O3), calculated on the dried basis


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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