Fertilizer Urea

Urea, a white crystalline solid containing 46% nitrogen, is widely used in the agricultural industry as an animal feed additive and fertilizer.

Urea is used as a nitrogen release fertilizer as it hydrolyses back to 2NH2 and CO2 but its most common impurity (biuret, NH2-CO-NH-CO-NH2) must be present at less than 2% as it impairs plant growth.

It is also used in many multi-component solid fertilizer formulations. Its action of nitrogen release is due to the conditions favoring the reagent side of the equilibriums which produce urea.
IUPAC name Diaminomethanal
Other names Carbamide
CAS number 57-13-6
Chemspider ID 1143
Molecular Formula (NH2)2CO
Molar mass 60.07 g/mol
Appearance white odourless solid
Density 1.33·10³ kg/m³
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) 26.9
Basicity(pKb) 13.82
Dipole moment 4.56 p/D
MSDS Sciencelab.com
NFPA 704 1

  Quality Management Systems ISO 9001-2008