The high analysis of urea—46% N—is the main reason for the low cof this form of nitrogen fertilizer.  Also known as carbamide, an organic compound with chemical formula CO(NH2)2. This amide has two –NH2 groups joined by a carbonyl (C=O) functional group.

Urea serves an important role in the metabolism of nitrogen-containing compounds by animals and is the main nitrogen-containing substance in the urine of mammals.