Urea
Test
Specification…IP
Appearance
A white, crystalline powder or transparent crystals; odorless or almost odorless, but may gradually develop a slight odor of ammonia upon long standing; slightly hygroscopic.
Solubility
Very soluble in water, soluble in alcohol, practically insoluble in methylene chloride
Appearance of solution
The solution is clear and colorless
Alkalinity
Passes test
Biuret
Maximum 0.1%
Ethanol insoluble matter
Not more than 0.04%
Heavy metals
Maximum 20ppm
Sulphated ash
Maximum 0.1%
Loss on drying
Maximum 1%
Assay
Not less than 99% and not more than 101%