1,3-Diisopropylbenzene is an aromatic hydrocarbon with the formula C<sub>6</sub>H<sub>4</sub>(CHMe<sub>2</sub>)<sub>2</sub> (Me = CH<sub>3</sub>). It is one of three isomeric diisopropylbenzenes. This colorless liquid is prepared by thermal isomerization of 1,4-diisopropylbenzene over a solid acid catalyst. It is the principal industrial precursor to resorcinol via the Hock rearrangement.