Ingredient dictionary

Hexyl Cinnamal

Also listed as: alpha-Hexylcinnamaldehyde

Hexyl Cinnamal is a synthetic fragrance ingredient with a soft, floral scent. Its main job is to give a product its smell. It is on the label of 145 products in our library. Checked against our library November 6, 2026.

The catch: it is one of the 26 fragrance allergens the EU asks brands to name on the label, so if you know you react to it, check the label first, since it can also appear in products scented only with essential oils.

Labelled fragrance allergens. If you know you react to one of them, this is the line to check. They also show up in products scented only with essential oils.

What Hexyl Cinnamal does

Adds a soft, floral scent
Blends and rounds out other fragrance notes
Helps scent stay on skin or hair

Hexyl Cinnamal is made in a lab rather than taken from plants. It is a synthetic aroma chemical, and it belongs to the cinnamal family of scent molecules, which are known for soft, sweet, floral notes. Perfumers use it to add a jasmine-like warmth to a blend.

Formulators add it to shampoos, conditioners, hair oils, deodorants and sunscreens mainly for scent, since many of these products are chosen partly for how they smell. It dissolves well in oils and creamy bases, so it stays evenly mixed through the product. On skin and hair, it usually gives a mild, pleasant scent.

Good for

Best for people who enjoy scented products and have no known fragrance sensitivity. Fragrance-free shoppers should skip it.

Be careful if

It is one of the 26 fragrance allergens the EU asks brands to name on the label, so if you know you react to it, check the label first, since it can also appear in products scented only with essential oils.

Frequently asked questions

Is Hexyl Cinnamal a fragrance allergen?

Yes, it is one of the 26 fragrance allergens the EU asks brands to name on labels. Many people tolerate it well, but if you know you react to fragrance, check the ingredient list before you buy.

Is Hexyl Cinnamal natural?

No. It is a synthetic aroma chemical made in a lab. It is not an essential oil, so labels that say natural or essential-oil scented do not rule it out.