Schiff 001 - Aurantiol ®
Synthetic Ingredient for Perfumery
Schiff 001, also known as Aurantiol, boasts a high odor strength with a floral-orange blossom aroma. It serves as a key ingredient in citrus cologne formulations, functioning as a potent fixative and enhancing top notes.
When incorporated into amber and chypre compositions, it imparts an oriental character, synergizing seamlessly with macrocyclic musks for a captivating scent profile.
📂 CAS N° — 89-43-0
⚖️ MW — 305.4 g/mol
📈 Odor Strength — High
👃🏼 Odor Profile — The most known (probably) Schiff base. Floral-Orange blossom type.
⚗️ Uses — Used in citrus cologne types, it acts as an excellent fixative as well as exalting the top notes. It gives an oriental character when used in amber and chypre compositions and blends particularly well with macrocyclic musks (cit.)
Schiff base (named after Hugo Schiff) is a compound with the general structure R1R2C=NR' (R' ≠ H).
They can be considered a sub-class of imines, being either secondary ketimines or secondary aldimines depending on their structure — Schiff, Ugo (1866)
An organic compound formed by a reaction between an aldehyde or ketone with a primary amine, e.g. hydroxycitronellal forms a Schiff s base with methyl anthranilate to give Aurantiol® — David Pybus and Charles Sell
The Schiff’s bases are less reactive than the free aldehyde and, since the molecular weight is much higher, they are less volatile. Thus, loss of the aldehyde by both chemical reaction and evaporation is slowed down. Moreover, hydrolysis of the Schiff’s base releases both the aldehyde and the methyl anthranilate, both of which have intense odors. Thus, use of a Schiff’s base generates a long-lived fragrance composition of the two ingredients.
Originally, the aldehydes used in these Schiff’s bases also had sweet, floral odours and so an harmonious accord was produced. Giorgio (Methyl Anthranilate + Helional) is an example of a fragrance which relies heavily on this type of accord.
