Organic Bases are organic compounds that act as a base. Organic bases are usually, but not always, proton acceptors. The most common organic bases contain amines (NH2). These groups will accept a H from acids. These are weak bases. Some typical examples are methylamine and ethylamine, pyridine, alkylamines, imidazole, and benzimidazole, histidine, guanidine, phosphazene bases, and hydroxides of quaternary ammonium cations.