Urea USP Grade

Appearance	Solid Crystal
Identification	A: Hcat about 500mgi in a test tube itllquefies and ammonia is evolved. Continue the heating until the liquid becomes turbid then cool. Dissolve the mass in a mixture of 10ml of water and 1ml of sodium hydroxide solution and I drop of cupric sulfate The solution acquires a reddish-violet color
Identification	B: Dissolve 100mg in 1ml of water and add 1ml of nitric acid a white crystalline precipitate of urea nitrate is formed
Test Items	Limit	Result
Bacterial endotoxins	Comply with the srandard	conform
Appearance:colourless,prism shaped crystalline or powder,no smell,salty taste		Confirms
Formula:CH4N2O
Identification A:The solution acquires a reddish-violet colour		Passes Test
Identification B:Dissolve 100mg in 1ml of water and add 1ml of nitric acid a white crystalline precipitate of urea nitrate is formed		Passes Test
Residue on ignition	≤0.1%	0.02%
Melting range	132C-135C	133C
Alcohol-insoluble matter	≤0.04%	0.012%
Ammonium	≤0.005%	0.003%
Chloride	≤0.007%	0.001%
Sulfate	≤0.01%	0.003%
Heavy metals	≤0.002%	0.001%
Loss on drying	≤0.5%	0.3%
Biuret	≤0.2%	0.11%

Related products