N-propanol refers to 1-propanol, which is a primary alcohol with a hydroxyl group connected to a primary carbon atom. The structural formula is: CH3CH2CH2OH;
Isopropanol refers to 2-propanol, which is a secondary alcohol with a hydroxyl group attached to a secondary carbon atom. The structural formula is CH3CH(OH)CH3;
N-propanol and isopropanol are two isomers of propanol, usually propanol refers to n-propanol.
Isopropanol is a secondary alcohol and can be identified by Lucas reagent. After a few minutes, the solution becomes turbid, while n-propanol needs to be heated to become turbid. Lucas reagent: a solution made of 36% HCl/ZnCl2 concentrated hydrochloric acid and anhydrous zinc chloride, which can be used to identify lower alcohols with six carbons or less.