What is Amyl Cinnamaldehyde?
Amyl Cinnamaldehyde (INCI: Amyl Cinnamal; also called Alpha-Amyl Cinnamic Aldehyde or Jasmine Aldehyde) is a synthetic fragrance chemical with a distinctive jasmine-like, sweet floral scent. It has been used in perfumery since the 1930s and became one of the signature ingredients in classic jasmine-type fragrances. It is widely used in soaps, detergents, and household cleaning products, as well as in fine fragrances.
Amyl Cinnamal is one of the eight components of Fragrance Mix I and one of the 26 EU-regulated fragrance allergens. Despite the EU calling for individual label declaration, it remains in widespread use because it is an effective and economical jasmine-scent molecule.
Chemically, amyl cinnamaldehyde is an alpha,beta-unsaturated aldehyde — a structural class particularly prone to hapten formation and sensitization because of the electrophilic aldehyde and the activated double bond both present as reaction sites.
Why does Amyl Cinnamaldehyde cause reactions?
Amyl cinnamaldehyde is an electrophilic molecule that readily reacts with nucleophilic amino acid residues (lysine, cysteine) in skin proteins. As an alpha,beta-unsaturated aldehyde, it has two electrophilic sites — making it a particularly efficient hapten-former and thus a more potent sensitizer than single-site reactants.
Contact allergy proceeds through classic Type IV delayed hypersensitivity. Cross-reactivity with other cinnamic aldehyde derivatives (cinnamal, hexyl cinnamal) is possible due to structural similarity. Housewives, cleaning workers, and individuals using high-fragrance detergents and soaps are at elevated occupational risk.
Where is Amyl Cinnamaldehyde found in products?
- Fine fragrances: Classic jasmine, floral, and oriental perfume compositions
- Soap: Very common in floral-scented soap bars and liquid soaps
- Household detergents and fabric softeners: Particularly jasmine or floral-scented laundry products
- Household cleaning sprays: With floral fragrance
How to spot Amyl Cinnamaldehyde on labels
- Amyl Cinnamal — the INCI name required on labels
- Alpha-Amyl Cinnamic Aldehyde — older technical name
- Amyl Cinnamaldehyde — common name
In Indian products 🇮🇳
Amyl cinnamal is found in many fragranced Indian household and personal care products. Jasmine is one of the most beloved scents in India — associated with traditional hair oil, garlands, and incense — and jasmine-scented products are pervasive in the Indian market. Many Indian soap brands offer jasmine-scented variants, and jasmine-type fragrances in laundry products and household cleaners are extremely common. Amyl cinnamal contributes to the jasmine character in many of these synthetic fragrance blends.
Indian consumers with confirmed FM I positive patch tests should be particularly cautious with jasmine-scented products, as amyl cinnamal is commonly the jasmine-character molecule used in synthetic formulations.
Safer alternatives
- Fragrance-free detergents and soaps: Remove fragranced laundry and personal care products
- Natural jasmine in attars: Real jasmine absolute contains indole, benzyl benzoate, and other compounds rather than synthetic amyl cinnamal — though natural jasmine has its own allergenicity profile
- Fragrance-free household cleaners: Plant-derived cleaning products labeled fragrance-free