Classification based on number of hydroxyl (OH) present.
(1) Monohydric – It has only one OH – group attached to it.
(2) Dihydric – It has two OH – groups attached to it.
(3) Trihydric – It has three OH – group attached to it.
Classification based on the position of the OH – group (mainly for monohydric)
(1) Primary Alkanol – Here, the carbon atom that bears the OH – group contains two hydrogen atoms.
(2) Secondary Alkanol – The carbon atom that bears the OH – group contains one hydrogen atoms only.
(3) Tertiary Alkanol – The carbon atom that bears the OH – group has no hydrogen atom attached to it.
