Hydroxyisohexyl 3-Cyclohexene Carboxaldehyde (also known as Lyral) is a synthetic fragrance compound formerly widely used in perfumes and cosmetics for its floral, lily-of-the-valley scent. Due to its high sensitizing potential, it has been restricted or banned in cosmetic products in the European Union.
| Reported effect | How often | Notes |
|---|---|---|
Allergic contact dermatitis | Common | One of the most frequent fragrance allergens identified in patch-test studies; included in extended baseline test series. |
Skin sensitization | Common | Capable of inducing allergic sensitization with repeated exposure, prompting regulatory restriction. |
Redness, itching, or eczema at application site | Uncommon | Localized irritant or allergic reactions in sensitive individuals. |
Generalized or widespread dermatitis flare | Rare | In already-sensitized individuals, exposure can trigger more extensive reactions. |
Frequencies reflect typical cosmetic use reported in the literature, not a guarantee for your skin.