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# Cyanamide

[sahy-an-uh-mid, -mahyd, sahy-uh-nam-ahyd, -id]

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Cyanamide (CN2H2) is an amide of cyanogen, a white, crystalline compound.

The term can also refer to a salt of this compound, having one or both of the hydrogen atoms replaced by another element or radical, such as in the most common case of calcium cyanamide (CaCN2), a compound used as a fertilizer and as a source of other compounds of nitrogen.

## Chemistry

Cyanamide can be prepared by hydrolysis of calcium cyanamide in presence of carbon dioxide by Frank-Caro process:
$mathrm\left\{CaCN_2 + H_2O + CO_2 rightarrow H_2NCN + CaCO_3\right\}$

## Uses

Since mid-1960s, there have been developed procedures to produce stabilized cyanamide for industry use. Cyanamide is used as a plant growth modulator and has many uses in chemical industry.

## Safety risks

Aqueous solutions of cyanamide with high concentration may undergo explosive polymerisation when heated. Stability of its solution can be increased by addition of a dicarboxylic acid such as adipic acid.