Delta-Undecalactone, with CAS number 710-04-3, is a synthetic aroma chemical known for its creamy, fruity, and slightly floral character, reminiscent of peach and coconut. It is commonly used in perfumery to impart a smooth, sweet note that can enhance the overall complexity of a fragrance. This compound typically finds its place in fruity and floral accords, where it can contribute to the heart or base of a formula, providing a lasting impression. Delta-Undecalactone is valued for its ability to blend well with other ingredients, making it a versatile choice for perfumers looking to create rich, multi-layered compositions. As with many synthetic aroma chemicals, it is important to consider safety and regulatory aspects when formulating with Delta-Undecalactone. While specific restrictions may vary, it is advisable to consult the latest IFRA guidelines and safety data to ensure compliance and safe usage in cosmetic applications. — AI-generated summary, 2026-09-02.
A soft, creamy lactone with a ripe peach-apricot character and a milky, slightly waxy undertone. Over time it reveals a coconut-tinged, buttery facet typical of the C11 lactone family — rounded and skin-warm rather than sharp or juicy.AI · claude-opus-4-7
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Perfume and Flavor Chemicals, page 1351.
Colorless, very viscous liquid.
Practically insoluble in water, soluble in alcohol and oils.
Powerful, creamy-fatty and in dilution pronounced Peach-like odor of excellent tenacity.
At concentrations below 10 ppm, the flavor is more typical Peach-like and less grassy than that of gamma-Undecalactone.
The title Lactone has been developed for use in perfumes and flavors, and it has found use primarily in flavors for its pleasant creamy effect.
It is generally used in Milk, Butter and Peach imitation flavors, and the concentration in finished products is about 1 to 2 ppm in beverages, 2 to 5 ppm in Ice cream, 5 to 20 ppm in baked goods.
Produced from Heptaldehyde plus Acetaldehyde, via 3-Nonenal by Michael's addition of Acetaldehyde to 2-Hexylglutaraldehyde. Internal Canizzaro’s reaction yields the cyclized Lactone.