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carbamide

Product name carbamide
Synonyms urea
GOST 2081-92
CAS 57-13-6

Carbamide (urea, carbonyl diamide) - colorless and odourless crystals, soluble in water, liquid ammonia, methanol, ethanol, ethyl acetate; insoluble in chloroform. Molecule of urea has planar configuration.

Properties

Being heated higher 150°C carbamide converts into NH4NCO, NH3, CO2, biuret, cyanuric acid.
Molten urea reacts with alkali metals to give cyanamide salts
Alkylation of urea results in alkylureas

Commercial production (Bazarov process)

2NH3 + CO2 = NH2COONH4 + 125.6 kJ/mol

NH2COONH4 = (NH2)2CO + H2O -15.49 kJ/mol

Uses

Industrial use:

  • As a raw material for the manufacture of plastics specifically, urea-formaldehyde resin.
  • As a raw material for the manufacture of various glues (urea-formaldehyde or urea-melamine-formaldehyde). The latter is waterproof and is used for marine plywood.
  • As a component of fertilizer and animal feed, providing a relatively cheap source of fixed nitrogen to promote growth.
  • As an alternative to rock salt in the deicing of roadways and runways. It does not promote metal corrosion to the extent that salt does.
  • As an additive ingredient in cigarettes, designed to enhance flavour.
  • As a flame-proofing agent.
  • As a raw material for the manufacture of some pharmaceutical preparates.
    Drug use
  • Urea is used in topical dermatological products to promote rehydration of the skin.
  • Urea is used as a diuretic to reduce the symptoms of Meniere\'s disease

  • Manufacturer(s) SC "Concern "Stirol"
    JSC Acron
    JSC Azot
    OJSC AZOT
    JSC AZOT
    JSC Azot Novomoskovsk
    JSC Dneprazot
    Ferghana productional amalgamation Azot
    OJSC Grodno Azot
    JSC Kuibyshevazot
    OJSC Mineral Fertilizers (Perm)
    JSC Nevinnomyssky Azot
    JSC Nitrofert
    JSC Salavatnefteorgsintez
    JSC Severodonetsk Azot Association
    JSC Togliattiazot
    Chemical structure of urea

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