Ingredient review

Acetaldehyde Ethyl Cis-3-Hexenyl Acetal

INCI: ACETALDEHYDE ETHYL CIS-3-HEXENYL ACETAL

A synthetic fragrance ingredient that adds a fresh, green scent but offers no skincare benefits and may be a concern for those with fragrance sensitivities.

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In plain English

This is a synthetic chemical added to products to give them a fresh, leafy, or green smell, like cut grass or crushed leaves. It does not moisturize, treat, or improve the skin in any way—its only job is to make the product smell nice. For most people, it is safe at the tiny amounts used, but if you have sensitive skin or a known fragrance allergy, it could cause irritation.

Quick decision guide

Useful, but context matters

Acetaldehyde Ethyl Cis-3-Hexenyl Acetal is generally a lower-concern ingredient when the full formula suits your skin.

Plain-English read

Treat this as a practical screening step before you compare products that contain this ingredient.

  1. Step 1Start with the score, then check the irritation and clogging risk before judging Acetaldehyde Ethyl Cis-3-Hexenyl Acetal.
  2. Step 2Use the "Best for" and "Use caution if" sections to match the ingredient to your skin, not just to a marketing claim.
  3. Step 3If a product stings, breaks you out, or worsens irritation, judge the finished formula and stop using it even if the ingredient scores well.

Score terms in plain English

Irritation risk

low

Less likely to sting, burn, or bother most users, though sensitive skin can still react.

Clogging risk

low

Less likely to feel heavy or contribute to clogged pores for most skin types.

Evidence level

moderate

There is useful support, but formula details and claim strength still matter.

What it is

A synthetic acetal compound created by chemically combining acetaldehyde with ethyl and cis-3-hexenyl alcohols. It is used exclusively as a fragrance ingredient in cosmetics and personal care products.

How it works

It evaporates from the skin after application, releasing a volatile scent that the nose perceives as fresh and green. It does not interact with the skin's biology or provide any functional benefit beyond fragrance.

Pros

Pleasant green scent

Adds a natural, fresh, leafy aroma that many people find appealing in skincare and beauty products.

Low irritation for most

At typical low concentrations, it is well-tolerated by the majority of users without causing redness or stinging.

Cons and cautions

No skin benefit

This ingredient only provides fragrance and does not hydrate, protect, or improve the skin in any way.

Potential allergen

As a synthetic fragrance compound, it can trigger allergic reactions or irritation in people with sensitive skin or fragrance sensitivities.

Best for

  • People who enjoy fresh, green-scented products
  • Those without fragrance sensitivities

Use caution if

  • Individuals with known fragrance allergies or very sensitive skin

Usage tips

If you have sensitive skin, patch test a new product containing this ingredient on a small area before full use.
Look for products that list this ingredient near the end of the INCI list, indicating a very low concentration.

Safety summary

Generally recognized as safe for use in cosmetics at low concentrations. However, like many fragrance ingredients, it can cause allergic reactions in susceptible individuals. Regulatory bodies such as IFRA set usage limits to minimize risk.

Research notes

Limited published research specifically on this compound. Its safety is assessed based on general fragrance ingredient guidelines and its structural similarity to other acetal fragrance compounds.

Common label clues

Typical concentration
Typically used at very low levels, often below 1% in finished products
Regulatory status
Approved for use in cosmetics in the EU, US, and other major markets, subject to concentration limits and labeling requirements for known allergens.
Common uses
Fragranced skincare, Perfumes, Body lotions, Hair products
Environmental note
As a synthetic compound, its environmental persistence and bioaccumulation potential are not well-studied, but it is used in very small amounts.

Good to know

  • This ingredient is often used in 'green' or 'herbal' fragrance blends to mimic the scent of fresh vegetation.
  • Fragrance ingredients are not required to be individually listed on labels in some regions, so this may appear simply as 'fragrance' or 'parfum'.

Common questions

What is Acetaldehyde Ethyl Cis-3-Hexenyl Acetal in beauty products?

This is a synthetic chemical added to products to give them a fresh, leafy, or green smell, like cut grass or crushed leaves. It does not moisturize, treat, or improve the skin in any way—its only job is to make the product smell nice. For most people, it is safe at the tiny amounts used, but if you have sensitive skin or a known fragrance allergy, it could cause irritation.

What does Acetaldehyde Ethyl Cis-3-Hexenyl Acetal do in a beauty product?

It evaporates from the skin after application, releasing a volatile scent that the nose perceives as fresh and green. It does not interact with the skin's biology or provide any functional benefit beyond fragrance.

Is Acetaldehyde Ethyl Cis-3-Hexenyl Acetal safe for most people?

Generally recognized as safe for use in cosmetics at low concentrations. However, like many fragrance ingredients, it can cause allergic reactions in susceptible individuals. Regulatory bodies such as IFRA set usage limits to minimize risk.

Who should be careful with Acetaldehyde Ethyl Cis-3-Hexenyl Acetal?

Individuals with known fragrance allergies or very sensitive skin

Research sources

IFRA Standards - Fragrance SafetyOpenPubChem - Acetaldehyde Ethyl Cis-3-Hexenyl AcetalOpenCosIng - European Commission DatabaseOpen

Ingredient reviews are educational and are not medical advice. Patch test new products and ask a licensed clinician about persistent irritation, allergies, pregnancy-specific questions, or diagnosed skin conditions.