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Ammonium Bromide

Ammonium Bromide Pure BP ACS Reagent Supplier, Manufacturer's Representative

CAS number: 12124-97-9

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DESCRIPTION

Ammonium Bromide BP
Formula: NH4Br - 97.9
CAS No: 12124-97-9

DEFINITION
Content: Ammonium Bromide 98.5 per cent to 100.5 per cent (dried substance).

CHARACTERS
Appearance: Ammonium Bromide is white or almost white, crystalline powder or colourless crystals, hygroscopic.
Solubility: Freely soluble in water, sparingly soluble in alcohol. It becomes yellow when exposed to light or air.

IDENTIFICATION
A. It gives reaction of bromides.
B. 10 ml of solution S (see Tests) gives the reaction of ammonium salts.

TESTS
Solution S: Dissolve 10.0 g in carbon dioxide-free water prepared from distilled water and  dilute to 100 ml with the same solvent.
Appearance of solution: Solution S is clear and colourless.
Acidity or alkalinity: To 10 ml of solution S add 0.05 ml of methyl red solution. Not more than 0.5 ml of  0.01 M hydrochloric acid or 0.01 M sodium hydroxide is required to change the colour of the indicator.
Bromates: To 10 ml of solution S add 1 ml of starch solution, 0.1 ml of a 100 g/l solution of  potassium iodide and 0.25 ml of 0.5 M sulphuric acid and allow to stand protected  from light for 5 min. No blue or violet colour develops.
Chlorides: Maximum 0.6 per cent.
Iodides: To 5 ml of solution S add 0.15 ml of ferric chloride solution and 2 ml of methylene  chloride. Shake and allow to separate. The lower layer is colourless.
Sulphates: Maximum 100 ppm.
Iron: Maximum 20 ppm.
Magnesium and alkaline-earth metals: Maximum 200 ppm, calculated as Ca
Heavy metals: Maximum 10 ppm.
Loss on drying: Maximum 1.0 per cent, determined on 1.000 g by drying in an oven at 100-105C
Sulphated ash: Maximum 0.1 per cent, determined on 1.0 g.

Ammonium Bromide ACS Analytical Reagent
Formula: NH4Br
Weight: 97.94
CAS No: 12124-97-9

REQUIREMENTS
Assay: 99.0% NH4Br
pH of a 5% solution: 4.5-6.0 at 25C

MAXIMUM ALLOWABLE
Residue after ignition: 0.01%
Bromate (BrO3): 0.002%
Chloride (Cl): 0.2%
Iodide (I): Passes test
Sulfate (SO4): 0.005%
Barium (Ba): 0.002%
Heavy metals (as Pb): 5 ppm
Iron (Fe): 5 ppm.

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