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Heavy Bismuth Subnitrate USP BP Grade Supplier, Manufacturer's Representative, CAS Number 1304-85-4
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For MSDS Sheet Click MSDS SDS of Heavy Bismuth Subnitrate Suppliers
Heavy Bismuth Subnitrate
CAS Number 1304-85-4 USP BP Suppliers
Bismuth Subnitrate USP
Bismuth hydroxide nitrate oxide Bi5O(OH)9(NO3)4 CAS 1304-85-4.
Bismuth Subnitrate is a basic salt that contains the equivalent of not less than 79.0 percent of bismuth trioxide (Bi2O3), calculated on the dried basis.
Packaging and storage: Preserve in well-closed containers.
Identification: It responds to the tests for Bismuth and for Nitrate.
Loss on drying: Dry it at 105 for 2 hours: it loses not more than 3.0% of its weight.
Carbonate: Add 3 g to 3 mL of warm nitric acid: no effervescence occurs. Pour the solution into 100 mL of water: a white precipitate forms. Filter, evaporate the filtrate on a steam bath to 30 mL, again filter the liquid, divide the latter filtrate into portions of 5 mL each, and use these several portions in the tests for Chloride, Sulfate, Copper, Lead, and Silver.
Chloride: A 10-mL portion of the test liquid retained in the test for Carbonate shows no more chloride than corresponds to 0.50 mL of 0.020 N hydrochloric acid (0.035%).
Sulfate: To a 5-mL portion of the test liquid retained in the test for Carbonate add 5 drops of barium nitrate: no turbidity is produced immediately.
Limit of ammonium salts: Boil about 100 mg with 5 mL of 1 N sodium hydroxide: the vapor does not turn moistened red litmus paper blue.
Arsenic, Method: Mix 375 mg with 5 mL of water, cautiously add 2 mL of sulfuric acid, and heat the mixture until fumes of sulfur trioxide are copiously evolved. Cool, cautiously add 10 mL of water, and again evaporate to strong fuming, repeating, if necessary, to remove any trace of nitric acid. The limit is 8 ppm.
Copper: To a 5-mL portion of the test liquid retained in the test for Carbonate add a slight excess of 6 N ammonium hydroxide: the liquid does not exhibit a bluish color.
Lead: Mix a 5-mL portion of the test liquid retained in the test for Carbonate with an equal volume of 2 N sulfuric acid: the liquid does not become cloudy.
Silver: To a 5-mL portion of the test liquid retained in the test for Carbonate add hydrochloric acid, dropwise: no precipitate is formed that is insoluble in a slight excess of hydrochloric acid, but that is soluble in 6 N ammonium hydroxide.
Limit of alkalies and alkaline earths: Boil 1.0 g with 20 mL of a mixture of equal volumes of 6 N acetic acid and water, cool, and filter. Add 2 mL of 3 N hydrochloric acid, precipitate the bismuth by the addition of hydrogen sulfide, boil the mixture, and filter it. Add 5 drops of sulfuric acid to the filtrate, evaporate to dryness, and ignite to constant weight: the weight of the residue does not exceed 5 mg (0.5%).
Heavy Bismuth Subnitrate BP
4[BiNO3(OH)2],BiO(OH) -- 1462 -- CAS 1304-85-4
Content: 71.0 per cent to 74.0 per cent of Bi (Ar 209.0) (dried substance).
Appearance: White or almost white powder.
Solubility: Practically insoluble in water and in ethanol (96 per cent). It dissolves in mineral acids with decomposition.
A. Dilute 1 ml of solution S1 (see Tests) to 5 ml with water and add 0.3 ml of potassium iodide solution. A black precipitate is formed which dissolves into an orange solution with the addition of 2 ml of potassium iodide solution.
B. It gives reaction (b) of bismuth.
C. It gives the reaction of nitrates.
D. pH: maximum 2.0 for solution S2 (see Tests).
Solution S1: Shake 5.0 g by gently heating in 10 ml of water and add 20 ml of nitric acid. Heat until dissolution, cool and dilute to 100 ml with water.
Solution S2: Place 1.00 g in a 20 ml volumetric flask and add 2.0 ml of lead-free nitric acid. Allow acid attack to take place without heating and if necessary warm slightly at the end to completely dissolve the test sample. Add 10 ml of water, shake and add, in small fractions, 4.5 ml of lead-free ammonia; shake and allow to cool. Dilute to 20.0 ml with water, shake again is required to change the colour of the indicator to pink.
Chlorides: Maximum 200 ppm.
Copper: Maximum 50.0 ppm.
Lead: Maximum 20.0 ppm.
Silver: Maximum 25.0 ppm.
Substances not precipitated by ammonia: Maximum 1.0 per cent.
To 20 ml of solution S1, add concentrated ammonia until an alkaline reaction is produced and filter. Wash the residue with water and evaporate the combined filtrate and washings to dryness on a water-bath. To the residue, add 0.3 ml of dilute sulphuric acid R and ignite.
The residue weighs a maximum of 10 mg.
Loss on drying: Maximum 3.0 per cent, determined on 1.000 g by drying in an oven at 105C.
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1 June, 2021