Cyanogen or Ethanedintrile (C2N2). A colourless, poisonous gas, very soluble in water. It is combustible and burns with a violet flame to give carbon dioxide and nitrogen.
C2N2 + 2O2
2CO2 + N2
Cyanogen chloride (ClCN). A colourless, poisonous gas, very soluble in water, alcohol and ether.
Cyano group. The group —CN in a chemical compound.
Cyanuric acid. A white crystalline water soluble trimer of cyanic acid, (HNCO)3.
Cyclo pentane (C5H10). A colourless liquid, b.p. 49.2°C, prepared from petroleum. It is used as a solvent.


