Ammonium Bicarbonate

Ammonium Bicarbonate:

Ammonium Bicarbonate BP Ph Eur

(Ammonium Hydrogen Carbonate) NH4HCO3 --- 79.1 --- CAS 1066-33-7

DEFINITION

Ammonium Hydrogen Carbonate contains not less than 98.0 per cent and not more than 101.0 per cent of the equivalent of ammonium hydrogen carbonate.

CHARACTERS
A fine, white, crystalline powder or white crystals, slightly hygroscopic, freely soluble in water, practically insoluble in alcohol. It volatilizes rapidly at 60C. The volatilization takes place slowly at ambient temperatures if the substance is slightly moist. It is in a state of equilibrium with ammonium carbamate.

IDENTIFICATION
A. It gives the reaction of carbonates and bicarbonates.
B. Dissolve 50 mg in 2 ml of water. The solution gives the reaction of ammonium salts.

TESTS
Solution S Dissolve 14.0 g in 100 ml of distilled water. Boil to remove the ammonia, allow to cool and dilute to 100.0 ml with distilled water.
Chlorides Dilute 5 ml of solution S to 15 ml with water. The solution complies with the limit test for chlorides (70 ppm).
Sulphates 15 ml of solution S complies with the limit test for sulphates (70 ppm) Iron Dilute 1.8 ml of solution S to 10 ml with water. The solution complies with the limit test for iron (40 ppm). Dissolve cautiously 2.5 g in 25 ml of 1 M hydrochloric acid. 12 ml of the solution complies with limit test A for heavy metals (10 ppm)