Ureas are organic compounds that contain a carbonyl group (C=O) bonded to two amine groups (NH2). They are commonly produced in the body as a waste product of protein metabolism and are primarily excreted in urine. The most well-known urea is simply called urea, which has the chemical formula NH22CO. In addition to their biological significance, ureas are also used in various industrial applications, such as fertilizers and plastics. They can be synthesized in laboratories and are important in the production of urea-formaldehyde resins, which are used in adhesives and coatings.