Denaturation and market separation

The market separation between taxed ethanol for potable purposes and foodstuffs, and untaxed ethanol for industrial purposes, is ensured through denaturation. Denaturation refers to the alteration of the natural smell, flavour or appearance (colour) of a substance by spiking it with additives.

In order to prevent consumption of untaxed ethanol, its production, importation and use are monitored by the Swiss Alcohol Board (SAB).

Do you have any questions about denaturation? Please contact us – we will gladly provide assistance.


You can choose from the following wide range of denaturants offered by alcosuisse. Combinations of more than one denaturant are also, of course, possible. We can also show you other specific denaturant solutions on request, use your own denaturant or store it on our premises, or work with you to look for other feasible solutions in consultation with the competent authorities.

Bitrex/rosemary oil-Ph.Eur.
Solution of Bitrex (content x ppm Bitrex)
Solution of cyclohexane (content x% cyclohexane)
Diethyl phthalate
Ethyl acetate
Solution of camphor (content 0.x% camphor)
Methyl ethyl cetone
Methyl isobuthyl ketone
Diethyl phthalate/rosemary oil-Ph.Eur.
Rosemary oil-Ph.Eur.
Solution of tert-Butanol