Urea

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Urea
Urea.png
Urea-3D-vdW.png
IUPAC name Aminomethylamide
Other names Carbamide
Identifiers
CAS number 57-13-6
SMILES NC(=O)N
Properties
Molecular 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

NFPA 704.svg

1
2
0
 
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)

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).

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.

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