Ammonium carbamate CAS 1111-78-0 is an organic substance with the molecular formula NH ν coonh ₄. It is an intermediate product in the production process of urea in the chemical industry. It is heated and dehydrated to form urea. Ammonium carbamate is toxic. The toxicity grade is poisoning. The acute toxicity is intravenous rat LD50: 39 mg / kg and intravenous mouse LD50: 77 mg / kg. It is combustible and releases toxic nitrogen oxides and ammonia.

Details about CAS 1111-78-0 Ammonium Carbamate

Chemical property of CAS 1111-78-0 Ammonium carbamate

When the aqueous solution is placed, it reacts with water to form ammonium bicarbonate, which decomposes rapidly in acidic solution.

When the temperature is low under pressure operation, NH3 and CO2 will react to form ammonium carbamate (hereinafter referred to as ammonium carbamate). The reaction equation is as follows:

2nh3 + CO2 = NH З coonh ₄↓ + heat

The substance is an intermediate product of urea (urea) made from carbon dioxide and ammonia

The conversion of ammonium carbamate to urea is incomplete and needs to be separated from the mixture solution containing urea, excess ammonia and water. Ammonium carbamate is a strong corrosive medium, which puts forward corresponding requirements for the materials used.

Related reactions:

(1) Ammonium carbamate is unstable and easy to decompose into ammonia and carbon dioxide:

NH З coonh ₄ = = (reversible) = = 2nh3 ↑ + CO2 ↑

(2) Ammonium carbamate is unstable and easy to absorb water. It dissolves in water to produce ammonium bicarbonate and ammonia monohydrate:

NH З coonh ₄ + 2H2O = = (reversible) = = NH ₄ HCO ₃ + NH ₃ · H2O

(3) Ammonium carbamate reacts at high temperature to produce urea, which is also the reaction formula for industrial preparation of urea:

NH З coonh ₄ = = (heating) = = CO (NH2) 2 + H2O

(4) Preparation of ammonium carbamate by gas phase reaction of ammonia and carbon dioxide:

2nh3 (gas) + CO2 (gas) = = (reversible) = = nh2coonh4 + heat.

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