Methyl amyl ketone (2-heptanone) has a penetrating fruity-green odor reminiscent of banana, pear and unripe fruit, with a distinct cheesy-fatty undertone. It flashes off quickly with a sharp, slightly acrid character before fading into a softer creamy-fruity nuance.AI · claude-opus-4-7
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Perfume and Flavor Chemicals, page 812.
Colorless liquid.
0.4% soluble in water, miscible with alcohol and oils, soluble in Propylene glycol. The ketone will dissolve 1.4% water.
Penetrating, fruity-spicy light and volatile odor with resemblance to the fresher notes in Cinnamon bark. However, it is generally classified as a rather 'chemical' odor, and only in extreme dilution it displays the more attractive spicy fragrance.
At concentrations below 50 ppm the taste is fresh, creamy-spicy, slightly fruity.
The ketone finds application in perfume compositions as a minor ingredient in Carnation or other spicy fragrances, in herbaceous types along with Estragon or Basil or Hyssop oils, and generally as a novel type of fresh topnote. It blends well with spicy and fruity fragrance materials.
In flavors, it may add the 'bite' to a Roquefort cheese flavor, or the fruity creamy note to a Banana flavor. It is also used in Coconut, Butter, various berry complexes, cheese and fruit blends, etc.
1) from Ethyl butyl acetoacetate. 2) from Heptyne by hydration.