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Cosmetic ingredient dictionary

Hydroxyisohexyl 3-Cyclohexene Carboxaldehyde in cosmetics: what it is and what it does

Hydroxyisohexyl 3-Cyclohexene Carboxaldehyde is a cosmetic ingredient that adds scent. The EU has banned it in cosmetics. Open Beauty Facts finds it in 98 products, most often hair care.

By Bravoora teamUpdated Sources checked 3 sourcesHow we check

What does Hydroxyisohexyl 3-Cyclohexene Carboxaldehyde do in a product?

In a cosmetic product, Hydroxyisohexyl 3-Cyclohexene Carboxaldehyde adds scent and hides an unwanted smell or taste. The EU’s CosIng database lists these jobs for it: perfuming and masking.

perfumingmasking

What other names and numbers does Hydroxyisohexyl 3-Cyclohexene Carboxaldehyde have?

CAS number
31906-04-4, 51414-25-6
EC number
250-863-4, 257-187-9
CosIng reference
41531

Is Hydroxyisohexyl 3-Cyclohexene Carboxaldehyde restricted in the EU?

Yes. The EU has banned Hydroxyisohexyl 3-Cyclohexene Carboxaldehyde in cosmetics (Regulation (EU) 2017/1410, which added it to Annex II of Regulation 1223/2009, the list of prohibited substances).

Is Hydroxyisohexyl 3-Cyclohexene Carboxaldehyde a fragrance allergen?

It was one of the fragrance allergens EU labels had to name. The EU has since banned it in cosmetics (Regulation (EU) 2017/1410), so a product made for the EU market today should not contain it.

Which products contain Hydroxyisohexyl 3-Cyclohexene Carboxaldehyde?

Open Beauty Facts finds Hydroxyisohexyl 3-Cyclohexene Carboxaldehyde in the ingredient lists of 98 of the 22,021 products it has a list for, most often hair care, bath and shower and perfumes.

  • Hair care9
  • Bath and shower8
  • Perfumes8
  • Shower gels7
  • Shampoos6

Products with it, by country of sale: France 51 · United States 11 · Germany 8 · Brazil 6.

Counted on 13 October 2026 from Open Beauty Facts, which volunteers fill from real packs: it shows where Hydroxyisohexyl 3-Cyclohexene Carboxaldehyde turns up, not how much of the market it is.

Bravoora reads this ingredient for everyone you shop for: an allergy or intolerance, a vegan or vegetarian diet, a calorie or protein goal, and the labels on supplements and skincare too. Build a profile · For dermatologists, dietitians and doctors

Sources

The job, the description and the EU annex entry are CosIng’s; the fragrance allergens are the EU Annex III names Bravoora’s label checker reads; the product counts are Open Beauty Facts’.

  1. European Commission: CosIng cosmetic ingredient database (functions, description, EU annex entry)
  2. Open Beauty Facts: product database, 77,506 products, read 13 October 2026, ODbL
  3. EU Regulation 1223/2009 on cosmetic products (the annexes)

Contains information from Open Beauty Facts, which is made available here under the Open Database License (ODbL). Read the licence · Download this dictionary’s data · How we check

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