Perfluoro-1,3-dimethylcyclohexane is a fluorocarbon liquid—a perfluorinated derivative of the hydrocarbon 1,3-dimethylcyclohexane.

Perfluoro-1,3-dimethylcyclohexane can be manufactured by the Fowler process, which involves moderating the action of elemental fluorine with cobalt fluoride in the gas phase from meta-xylene.

This is preferred as the starting material over 1,3-dimethylcyclohexane as less fluorine is required.

It is a clear, colorless liquid, with a relatively high density, low viscosity and low surface tension that will rapidly evaporate.

[2] In common with other cyclic perfluorocarbons, perfluoro-1,3-dimethylcyclohexane can be detected at extremely low concentrations, making it ideal as a tracer.