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**Systematic name:** Diaminomethanal
**Molecular formula:** CH₄N₂O
**Chemical formula (condensed):** (NH₂)₂CO
**Molar mass:** 60,06 g/mol
**Information:** Urea is a white solid. Urea was first synthesized artificially by treating silver cyanate with ammonium chloride (Friedrich Wohler, 1828).
**Use:** It is used to produce plastics (urea-formaldehyde resins), fertilizers and pharmaceuticals.
**Appearance:** Urea is the waste product of the metabolism of mammals, amphibians, certain fish and is therefore present in their urine.