Primary alcohol

A primary (1°) alcohol is an alcohol where the carbon attached to OH is itself only attached to one other carbon. For example, ethanol CH3CH2OH is a primary alcohol, as is n-propanol CH3CH2CH2OH. The terms secondary alcohol and tertiary alcohol denotes alcohols where the C-OH carbon is attached to two and three other carbons, respectively (e.g. 2-propyl alcohol and tert-butyl alcohol).