Ingredient review

Cis-3-Hexenyl 2-Methylbutyrate

INCI: CIS-3-HEXENYL 2-METHYLBUTYRATE

A synthetic fragrance ingredient that adds a fresh, green scent but offers no skincare benefits and may be unnecessary for sensitive skin.

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In plain English

This is a synthetic chemical that smells like fresh-cut grass or green leaves. It is added to skincare and beauty products solely to make them smell pleasant. It does not moisturize, treat, or improve your skin in any way. Think of it as a scent additive, not a functional ingredient.

Review score

Safety, usefulness, and evidence

3.5Good
3.5/ 5

Potentially useful with some tradeoffs

The evidence base is useful, but some claims depend heavily on the formula.

Risk flags are low for most users, though the finished product can still irritate.

Source
synthetic
Evidence
moderate
Irritation
low
Clogging risk
low
How reviews are scored

Quick decision guide

Useful, but context matters

Cis-3-Hexenyl 2-Methylbutyrate 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 Cis-3-Hexenyl 2-Methylbutyrate.
  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

Cis-3-Hexenyl 2-Methylbutyrate is a synthetic ester compound. It is created in a lab to mimic the natural green, leafy scent found in plants like grass and green tea. It belongs to a family of chemicals called 'green notes' used in perfumery.

How it works

In a cosmetic product, this ingredient works only as a fragrance. It evaporates from the skin's surface, and its molecules interact with olfactory receptors in your nose to create the perception of a fresh, green scent. It has no known effect on the skin's structure or function.

Pros

Pleasant scent

Adds a natural, fresh green aroma that many find appealing and uplifting in skincare products.

Low irritation potential

Generally considered safe and has a low risk of causing skin irritation for most people when used at typical low concentrations.

Cons and cautions

No skin benefit

This ingredient is purely for scent. It does not hydrate, soothe, repair, or provide any active skincare benefit to your skin.

Potential allergen

Like all fragrance ingredients, it can cause allergic reactions or irritation in some individuals, especially those with sensitive or reactive skin.

Best for

  • People who enjoy a fresh, green scent in their skincare
  • Those without fragrance sensitivities looking for a pleasant sensory experience

Use caution if

  • Individuals with sensitive skin or a known allergy to fragrance ingredients
  • Anyone seeking fragrance-free products to minimize irritation risk

Usage tips

If you have sensitive skin, look for products labeled 'fragrance-free' to avoid this and other scent ingredients.
Patch test a new product containing this ingredient on a small area of skin before applying it to your face.
Use fragranced products like this one later in your routine (e.g., as a moisturizer) rather than in leave-on serums if you are concerned about irritation.

Safety summary

Cis-3-Hexenyl 2-Methylbutyrate is considered safe for use in cosmetics at the low concentrations typically employed. It has a low potential for skin irritation and sensitization, but like all fragrance ingredients, it can be a contact allergen for susceptible individuals.

Research notes

Research on this specific compound is limited, but it is part of a well-studied class of fragrance esters. Safety assessments by fragrance industry panels (e.g., IFRA) and regulatory bodies support its safe use. No significant peer-reviewed studies on its cosmetic efficacy exist, as it is not an active ingredient.

Common label clues

Typical concentration
Very low, typically less than 1% in finished products
Regulatory status
Approved for use as a fragrance ingredient in cosmetics by major regulatory bodies including the FDA (USA) and the EU Cosmetics Regulation, subject to general safety requirements for fragrance allergens.
Common uses
Fragranced skincare, Perfumes, Body lotions, Cleansers
Environmental note
As a synthetic compound, its environmental impact is generally lower than harvesting natural plant materials for scent, but its production still involves chemical synthesis and energy use.

Good to know

  • This ingredient is often listed near the end of an ingredient list, indicating it is used in very small amounts.
  • Its scent profile is often described as 'green,' 'leafy,' or 'grassy,' similar to the smell of crushed leaves.

Common questions

What is Cis-3-Hexenyl 2-Methylbutyrate in beauty products?

This is a synthetic chemical that smells like fresh-cut grass or green leaves. It is added to skincare and beauty products solely to make them smell pleasant. It does not moisturize, treat, or improve your skin in any way. Think of it as a scent additive, not a functional ingredient.

What does Cis-3-Hexenyl 2-Methylbutyrate do in a beauty product?

In a cosmetic product, this ingredient works only as a fragrance. It evaporates from the skin's surface, and its molecules interact with olfactory receptors in your nose to create the perception of a fresh, green scent. It has no known effect on the skin's structure or function.

Is Cis-3-Hexenyl 2-Methylbutyrate safe for most people?

Cis-3-Hexenyl 2-Methylbutyrate is considered safe for use in cosmetics at the low concentrations typically employed. It has a low potential for skin irritation and sensitization, but like all fragrance ingredients, it can be a contact allergen for susceptible individuals.

Who should be careful with Cis-3-Hexenyl 2-Methylbutyrate?

Individuals with sensitive skin or a known allergy to fragrance ingredients Anyone seeking fragrance-free products to minimize irritation risk

Research sources

The Good Scents Company - Cis-3-Hexenyl 2-MethylbutyrateOpenPubChem - Cis-3-Hexenyl 2-MethylbutyrateOpenIFRA Standards - Fragrance SafetyOpen

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.