Synthesis of bismuth oxynitrate (bismuth subnitrate)

Preparation of bismuth oxynitrate

Bismuth salts in aqueous solution undergo partial hydrolysis very readily. In presence of a considerable amount of free acid, the Bi3+ ion is capable of existence in solution; but with decreasing quantities of acid the tendency to hydrolyze increases, and the basic salt of bismuth, which is only slightly soluble, separates.

The reaction equation does not represent an actual composition of bismuth oxynitrate. The formulas like Bi5O(OH)9(NO3)4, or Bi6O4(OH)4(NO3)6 · 4H2O which represents BiONO· H2O are more accurate.

42 grams of crystallized bismuth nitrate pentahydrate (Bi(NO3)3 · 5H2O) are dissolved without heating in 10 ml of 6 N (~30%) nitric acid and 20 ml of water. This solution is poured into 2 liters of cold water with thorough stirring. The obtained precipitate are left to completely settle, and as soon as this has occurred, the solution is filtered. The bismuth oxynitrate is quickly washed on the filter with 20 ml of water and dried. The filtrate contains considerable quantities of bismuth ions, which can be conveniently saved as oxide by precipitating with sodium carbonate.

Synthetic inorganic chemistry, by A. A. Blanchard, 314-315, 1936





InChI Key


Canonical SMILES


Depositor-Supplied Synonyms

Bismuth nitrate oxide, Bismuth(III) oxynitrate, Bismuth(III) subnitrate, Bismuth(III) nitrate basic, 10334_RIEDEL, B0426_SIAL, 95379_FLUKA, MolPort-027-720-479, 10334_SIAL, 310646_SIAL, AKOS015903920, U060, I14-17794

Removed Synonyms

Bismuthyl nitrate, Bismuth oxynitrate, BISMUTH SUBNITRATE, 10361-46-3, 1304-85-4





InChI Key


Canonical SMILES


Isomeric SMILES


Depositor-Supplied Synonyms


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1 comment

  1. Ryan

    Thanks for the info. This is an ingredient in golden glass that has been out of reach for a while because it is produced commercially only in small quantities making it far more expensive than the sum of buying the bismuth salts, nitric acid, water, sodium carbonate, and filter. You just saved me and my art co-op buddies about $500. ^___^

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