Urea

Urea is an organic compound. It was first found in urine in 1773 by the French chemist Jean Rouelle. It is also called Carbamide, and its chemical names are Carbonyl Diamide (used in inorganic chemistry) and Diaminomethanal (used in organic chemistry).

Urea

Names
IUPAC name Aminomethylamide
Other names Carbamide
Identifiers
CAS Number	57-13-6
3D model (JSmol)	Interactive image
ChemSpider	1143
ECHA InfoCard	100.000.286
E number	E927b (glazing agents, ...)
CompTox Dashboard (EPA)	DTXSID4021426
SMILES NC(=O)N
Properties
Chemical formula	(NH2)2CO
Molar mass	60.07 g/mol
Appearance	white odourless solid
Density	1.33·10³ kg/m³,[1] solid
Melting point	132.7 °C (406 K) decomposes
Boiling point	n.a.
Solubility in water	108 g/100 ml (20 °C) 167 g/100 ml (40 °C) 251 g/100 ml (60 °C) 400 g/100 ml (80 °C) 733 g/100 ml (100 °C)
Acidity (pKa)	0.18
Basicity (pKb)	13.82
Structure
Dipole moment	4.56 p/D
Hazards
MSDS	ScienceLab.com
NFPA 704	1 2 0
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

In humans, it is a normal component of blood and many body tissues. It is produced in the liver, where ammonia, a very toxic substance, is changed into urea, which has a very low toxicity, so low in fact, that it is many times less toxic than table salt. Most of the urea produced in this way is not needed by the body, and is removed from the blood in the kidneys and taken out of the body in urine.