Definition of Imidazole
Imidazole is an organic compound having the molecular formula as C3N2H4. It occurs in a solid-state and has a white colour. It is highly polar in nature, soluble in water, and upon dissolution, it forms a slightly alkaline solution. It belongs to the class of aromatic heterocyclic compounds.
The two nitrogen atoms present in the structure are non-adjacent to each other. Many alkaloids also contain imidazole ring in their structure. An amino acid, histidine, and a related hormone, histamine also have this ring present in their structure. Purine (a double-ringed nitrogenous base) is formed when imidazole is fused to pyrimidine (a single ringed nitrogenous base).