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\hek-sān\ n [ISV] (1877) C6H14. A straight-chain hydrocarbon, extracted from petroleum or natural gas. Commercial grades contain other hydrocarbons such as cyclohexane, methyl cyclopentane, and benzene. Hexanes are used as catalyst-carrying solvents in the polymerization of olefins and elastomers. Sp gr, 0.660; bp, 69°C; solidification range −95° to −100°C; flp, −22°C (−70°F).http://static-content.springer.com/image/prt%3A978-1-4419-6247-8%2F8/MediaObjects/978-1-4419-6247-8_8_Part_Fig1-5936_HTML.jpg