Urea, also known as carbamide, is an organic compound with chemical formula has two –NH2 (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. It is a colorless, odorless solid, highly soluble in water, and practically non-toxic (LD50 Dissolved in water, it is neither acidic. The body uses it in many processes, most notably nitrogen excretion forms it by combining two ammonia (CO2) molecule in the urea cycle. Urea is widely used in fertilizers as a source of nitrogen (N) and is an important raw material.
Friedrich Wöhler , in 1828, that urea can be produced from inorganic starting materials, was an important conceptual milestone in chemistry. It showed, for the first time, that a substance, previously known only as a byproduct of life, could be synthesized in the laboratory, without biological starting materials, thereby contradicting the widely held doctrine of vitalism , which stated that only living things could produce the chemicals of life.