A sharp, penetrating mint-camphor odor reminiscent of pennyroyal — cooler and more medicinal than peppermint, with a slightly harsh herbal-green edge. Lacks the sweetness of menthol; comes across dry, biting, and somewhat acrid.AI · claude-opus-4-7
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Perfume and Flavor Chemicals, page 1214.
Colorless oily liquid.
Practically insoluble in water, soluble in alcohol and oils.
Powerful and relatively diffusive, herbaceous-minty, resinous odor.
The title ketone is occasionally used in flavor compositions, mainly as a modifier in Peppermint flavors — to add spicy notes and power.
Apart from occasional use in artificial essential oils, the ketone does not find much use in perfumery. The natural parent material, Pennyroyal oil, is frequently used and highly appreciated by certain schools of perfumers for use as a powerful soap perfume ingredient. It performs extremely well in herbaceous Fougére type fragrances, Lavender and Lavender-spice compositions, etc.
1) by isolation from Pennyroyal oil, usually the Moroccan or the Spanish type. 2) synthetic from 3-Methyl cyclohexanone. This method will also produce some iso-Pulegone.