Urea, also known asÃÂÃÂ carbamide, is anÃÂÃÂ organic compoundÃÂÃÂ withÃÂÃÂ chemical formulaÃÂÃÂ CO(NH2)2. ThisÃÂÃÂ amideÃÂÃÂ has twoÃÂÃÂ ÃÂÃÂ¢ÃÂÃÂÃÂÃÂNH2ÃÂÃÂ groups joined by aÃÂÃÂ carbonylÃÂÃÂ (C=O)ÃÂÃÂ functional group.
rea serves an important role in theÃÂÃÂ metabolismÃÂÃÂ ofÃÂÃÂ nitrogen-containing compounds by animals and is the main nitrogen-containing substance in theÃÂÃÂ urineÃÂÃÂ ofÃÂÃÂ mammals. It is a colorless, odorless solid, highly soluble in water, and practically non-toxic (LD50ÃÂÃÂ is 15 g/kg for rats).ÃÂÃÂ Dissolved in water, it is neitherÃÂÃÂ acidicÃÂÃÂ norÃÂÃÂ alkaline. The body uses it in many processes, most notablyÃÂÃÂ nitrogen excretion. TheÃÂÃÂ liverÃÂÃÂ forms it by combining twoÃÂÃÂ ammoniaÃÂÃÂ molecules (NH3) with aÃÂÃÂ carbon dioxideÃÂÃÂ (CO2) molecule in theÃÂÃÂ urea cycle. Urea is widely used inÃÂÃÂ fertilizersÃÂÃÂ as a source of nitrogen (N) and is an importantÃÂÃÂ raw materialÃÂÃÂ for theÃÂÃÂ chemical industry.