Abstract: A system for using a high-purity hydrocarbon heat-transfer media includes a quantity of working fluid and a heat exchanger. The quantity of working fluid is a mixture of at least two high-purity hydrocarbons thus allowing the quantity of working fluid to function as an environmentally safe, non-toxic, and Perfluorinated and Polyfluorinated Acrylic Substances (PFAS) free high-purity hydrocarbon heat-transfer media. The heat exchanger is configured to transfer heat with the quantity of working fluid. The quantity of working fluid is configured to be safe for a surrounding environment as the quantity of working fluid leaks into the surrounding environment due to operational failure or operational degradation of the heat exchanger.

Abstract: A hydrocarbon composition prepared by combining methane, ethane, isopentane, normal pentane, hexane and heptane at an appropriate compounding ratio contains 75% or more by volume of propane, isobutane and normal butane, to have ignition temperature of 800° C. and above. This composition is safe and economical in using as a refrigerant for use in air conditioners and refrigerators or a detergent for cleansing precision components such as semiconductor chips. The composition can be used independently without being combined with a conventional refrigerant such as CFC and HFC and does not destroy ozone, thus to contribute to the protection of the environment.