Dicyandiamide (2-Cyanoguanidine) is an nitrile derived from guanidine. It is a dimer of cyanamide, from which it can be prepared. 2-Cyanoguanidine is a colourless solid that is soluble in water, acetone, and alcohol, but not nonpolar organic solvents.
2-Cyanoguanidine is produced by treating cyanamide with base. It is produced in soil by decomposition of cyanamide. A variety of useful compounds are produced from 2-cyanoguanidine, guanidines andmelamine. It is also used as a slow fertilizer. Formerly, it was used as a fuel in some explosives. It is used in the adhesive industry as a curing agent for epoxies.
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Properties |
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| Molecular formula | C2H4N4 |
| Molar mass | 84.08 g/mol |
| Appearance | White crystals |
| Density | 1.400 g/cm3 |
| Melting point | 209.5 °C |
| Boiling point | 252 °C |
| Solubility in water | 41.3 g/l |
| log P | -0.52 |
| kH | 2.25·10-10 atm.m³/mol |