Abstract: The present invention concerns a process for treating a composition containing renewable isododecane, the process comprising inter alia treating a first composition with Oleum; adding water to the treated first composition and agitating the mixture; allowing the aqueous phase containing oxidized and/or sulfonized compounds and the non-aqueous phase containing renewable isododecane to separate; removing the aqueous phase containing oxidized and/or sulfonated compounds in order to obtain the non-aqueous phase containing the renewable isododecane; adding an alkaline aqueous washing solution to the non-aqueous phase containing the renewable isododecane; removing the aqueous washing solution and optionally drying the non-aqueous phase containing the renewable isododecane in order to obtain a second composition containing renewable isododecane. The invention further concerns a composition obtainable by this process and its use, in particular in a cosmetic product of application.