Acetonyl acetone (2,5-hexanedione) has a sweet, buttery, slightly fermented odor reminiscent of caramel and cheesy-fruity notes. It carries a diketone character similar to but heavier than diacetyl, with mildly solvent-like undertones.AI · claude-opus-4-7
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Perfume and Flavor Chemicals, page 22.
Colorless liquid.
Miscible with water, ethylalcohol and ether, ess. oils and perfume materials.
Pleasant, sweet-ethereal odor.
Possible use in perfumery for fresh-ethereal, winey top notes
Possible use in perfumery for fresh-ethereal, winey topnotes. Presumably not used in flavors.
Produced by hydrolysis of 2,5-dimethyl-furan. Also formed in Nature in the pyrolysis of Acetone. This has interest to the study of the synthesis of Rose Oxide and related chemicals. Another synthesis uses Sodium ethyl acetoacetate plus Iodine. This reaction is followed by decarboxylation by heating.