The information here describes the ingredient in general. Its possible sources may vary and do not necessarily show the origin or form used in a particular YUMA product. For product-specific information, check the relevant product page.
Trans-2-cis-6-Nonadienal is an exceptionally potent aromatic ingredient with distinctive green notes. It is used primarily to impart marine, cucumber, and melon aromas to fragrance compositions. In small quantities, it offers a subtle botanical bouquet that enriches scent profiles.
Its main natural source is violet leaf absolute, where it has been identified as one of the key compounds responsible for the characteristic scent. Violet Leaf is the most widespread plant source used for isolating this molecule.
Trans-2-cis-6-Nonadienal has an extremely low odor detection threshold (at the ppb level, or parts per billion), making it particularly potent. Because of this strength, it must be used in dilution within fragrance formulas.
Compared to similar molecules, Trans-2-cis-6-Nonadienal is used more often for cucumber notes, whereas cis-6-Nonenal is preferred for melon notes. Both Trans-2-cis-6-Nonadienal and Trans-2-cis-6-Nonadienol are used for violet leaf notes, with the latter offering a more floral and softer feel.
It is worth noting that this is an expensive raw material in the fragrance industry, which influences its use across various formulations.
Trans-2-cis-6-Nonadienal is so potent that it can be detected at concentrations of just a few parts per billion (ppb). This means that if a single drop were diluted in an Olympic-sized swimming pool, its scent would still be perceptible.
While Trans-2-cis-6-Nonadienal creates the authentic sensation of freshly cut cucumber in fragrances, its chemical relative cis-6-Nonenal is what imparts the characteristic ripe melon note. This subtle chemical difference is what determines the sense of freshness versus sweetness in perfumes.
Violet leaves represent the richest natural source of this molecule, providing the characteristic green, fresh aroma found in many classic fragrances. This discovery has made violet leaves highly valuable to perfumers seeking authentic botanical notes.
The IFRA Standards form an industry self-regulatory system. They may prohibit or restrict the use of particular fragrance ingredients, or set specifications, according to end use. The status below reflects the IFRA data recorded for this ingredient. It is not a product certification and does not replace applicable law or assessment of the finished product.