In chemistry, the alkoxy group is an alkyl (carbon and hydrogen chain) group singular bonded to oxygen thus: R—O. The range of alkoxy groups is great, the simplest being methoxy (CH₃O—). An ethoxy group (CH₃CH₂O—) is found in the organic compound ethyl phenyl ether, C₆H₅OCH₂CH₃ which is also known as ethoxybenzene. Related to alkoxy groups are aryloxy groups, which have an aryl group singular bonded to oxygen such as the phenoxy group (C₆H₅O—).