Ligroin is a refined saturated hydrocarbon petroleum fraction similar to petroleum ether used mainly as a laboratory solvent. It predominantly consists of C7 to C11 in the form of about 55% paraffins, 30% monocycloparaffins, 12% alkylbenzenes, and 2% dicycloparaffins. It is nonpolar. Generally laboratory grade ligroin boils at 60 to 90 °C.
The first motor car, the Benz Patent-Motorwagen, used ligroin as a fuel.
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