Aldehyde C-11 Undecylenic, commonly known as 10-Undecenal, is a historic synthetic ingredient produced primarily from castor oil derivatives. Its emergence, alongside other fatty aldehydes in the early 20th century, helped revolutionize the fragrance industry by moving it beyond mere imitation of nature and into the era of abstract perfumery. In physical form, it is a clear, colorless to pale yellow liquid, belonging to the aldehydic family with a waxy-floral character.
Description
The scent of Aldehyde C-11 Undecylenic radiates a clean, soapy-waxy freshness, interwoven with the airy nuance of rose petals, a slight cool citrus lift, and a sharp metallic effect. Functioning as a top note, booster, and modifier, this material has extremely high odor impact, excellent diffusion, and a lasting presence of 24 to 48 hours on a blotter. In fragrance compositions, it helps create a sparkling effect and brightens rose and jasmine notes. Perfumers often combine it with Aldehyde C-10, C-12, ylang-ylang, musks, and oakmoss to build classic aldehydic floral accords. Because its odor is so powerful and can easily ruin a formula if overdosed, it must be diluted in safe solvents such as DPG, TEC, or IPM at 1% or 10% for easier dosage control.
Applications
In terms of applications, this material is widely used in fine fragrance, scented candles, leave-on and rinse-off cosmetics, and is especially valued in soap for its fresh odor effect. Aldehyde C-11 Undecylenic is considered safe and is not subject to strict IFRA restrictions, allowing flexible use, although in practice it is only needed at very low levels, typically from 0.01% to 0.5%. Users generally do not need to worry about phototoxicity or EU allergen labeling requirements. However, storage requires absolute care: the container must be tightly sealed, exposure to air minimized, and the material kept in a cool, dry place to prevent oxidation into acids with sour, unpleasant odors. Many perfume masterpieces such as Chanel No. 5 and Lanvin Arpège bear the distinct signature of this ingredient. Its value was firmly recognized in Perfume and Flavor Chemicals, where Steffen Arctander described Undecen-10-al as having a sweet, waxy, powerful odor with pronounced rose and citrus facets. He emphasized its enormous odor strength, noting that it should only be used in trace amounts, and carefully warned of its tendency to oxidize into objectionable-smelling byproducts if stored improperly.
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Free shipping is available for international retail orders valued at 500 USD or more.
Delivery time is 1-3 business days for local areas, 3-7 days for suburban and nationwide deliveries, and 1-4 weeks for international orders.
You have 30 days from the date of receipt to initiate the return process.
