Is Hydroxyisohexyl 3-cyclohexene carboxaldehyde Banned? EU vs US Status, Risks & Where It Hides
TL;DR: Hydroxyisohexyl 3-cyclohexene carboxaldehyde is banned in the EU but allowed in the US (fragrance allergens).
INCI name Hydroxyisohexyl 3-Cyclohexene Carboxaldehyde. CAS 31906-04-4.
Is Hydroxyisohexyl 3-cyclohexene carboxaldehyde banned in the EU?
| EU status | Banned |
|---|---|
| US status | Allowed |
| Risk level | medium |
| Where it shows up | perfume, deodorant, lotion |
| CAS number | 31906-04-4 |
What is Hydroxyisohexyl 3-cyclohexene carboxaldehyde?
Hydroxyisohexyl 3-cyclohexene carboxaldehyde (Hydroxyisohexyl 3-Cyclohexene Carboxaldehyde) is a fragrance allergen (Lyral).
Why is Hydroxyisohexyl 3-cyclohexene carboxaldehyde used in personal-care products?
It is used for its preservative, coloring, fragrance, solvent or texture-enhancing function.
Is Hydroxyisohexyl 3-cyclohexene carboxaldehyde dangerous? Documented risks
A strong fragrance allergen; banned in EU cosmetics since 2021.
Products that may contain Hydroxyisohexyl 3-cyclohexene carboxaldehyde
- perfume
- deodorant
- lotion
How to avoid Hydroxyisohexyl 3-cyclohexene carboxaldehyde: safer alternatives
Choose EU-compliant or 'free-from' formulations and read the INCI list. BannedPantry flags this ingredient and suggests safer swaps.
Frequently asked questions about Hydroxyisohexyl 3-cyclohexene carboxaldehyde
Is Hydroxyisohexyl 3-cyclohexene carboxaldehyde banned in the EU?
Hydroxyisohexyl 3-cyclohexene carboxaldehyde is banned under the EU Cosmetics Regulation (1223/2009), but it is allowed in US personal-care products.
Is Hydroxyisohexyl 3-cyclohexene carboxaldehyde in US cosmetics?
Yes — Hydroxyisohexyl 3-cyclohexene carboxaldehyde can still appear in US-sold cosmetics and personal-care products because US rules are far less restrictive than the EU's.
What products contain Hydroxyisohexyl 3-cyclohexene carboxaldehyde?
Read the INCI ingredient list on the back of the package. Scan the barcode with BannedPantry to flag Hydroxyisohexyl 3-cyclohexene carboxaldehyde automatically.
Are there safer alternatives to Hydroxyisohexyl 3-cyclohexene carboxaldehyde?
Yes. Look for EU-compliant or 'free-from' formulations; BannedPantry suggests safer swaps when it detects Hydroxyisohexyl 3-cyclohexene carboxaldehyde.
Scan any product's barcode and instantly see if it contains Hydroxyisohexyl 3-cyclohexene carboxaldehyde or other ingredients banned overseas.
Scan a product free →Related fragrance allergens
Avoiding banned beauty ingredients? Check your food, too.
Sources
- EU Cosmetics Regulation Annex II (prohibited substances) — EU Cosmetics Regulation 1223/2009
- EU-banned cosmetics ingredients and US impact — RegASK
- Chemicals in cosmetics — CHEM Trust
Our scores are never influenced by brands. Last updated 6/11/2026.