PROBLEM TO BE SOLVED: To provide easily spreadable volatile hydrocarbons as an alternative to be used for cosmetic compositions.SOLUTION: There are provided easily spreadable oil constituents in cosmetic compositions and/or medicinal compositions comprising ethylhexanoic acid, isononanoic acid, isodecanoic acid, isostearic acid, monomer fatty acid, neodecanoic acid or mixture of these fatty acids, or hydrocarbons having 10-22 carbon atoms obtained by Kolbe electrolysis of the mixture of these fatty acids and pivalic acid or cyclohexane carboxylic acid.COPYRIGHT: (C)2014,JPO&INPIT