Ingredient review
Cis-3-Hexenyl Isovalerate
INCI: CIS-3-HEXENYL ISOVALERATE
A synthetic fragrance ingredient that adds a fresh, green scent; generally safe but may cause sensitivity in those with fragrance allergies.
In plain English
Cis-3-Hexenyl Isovalerate is a man-made ingredient that smells like freshly cut grass or green leaves. It's added to skincare and beauty products to give them a pleasant, natural-smelling fragrance. It doesn't provide any skin benefits like moisturizing or anti-aging—it's purely for scent.
Review score
Safety, usefulness, and evidence
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
Quick decision guide
Useful, but context matters
Cis-3-Hexenyl Isovalerate 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.
- Step 1Start with the score, then check the irritation and clogging risk before judging Cis-3-Hexenyl Isovalerate.
- Step 2Use the "Best for" and "Use caution if" sections to match the ingredient to your skin, not just to a marketing claim.
- 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
lowLess likely to sting, burn, or bother most users, though sensitive skin can still react.
Clogging risk
lowLess likely to feel heavy or contribute to clogged pores for most skin types.
Evidence level
moderateThere is useful support, but formula details and claim strength still matter.
What it is
A synthetic ester compound created by combining cis-3-hexenol (a green-smelling alcohol) with isovaleric acid. It belongs to a class of fragrance ingredients known as 'green notes' because they mimic the smell of fresh vegetation.
How it works
In a cosmetic product, it acts solely as a fragrance ingredient. It evaporates from the skin's surface, releasing its scent. It does not interact with the skin's biology or provide any functional benefit beyond odor.
Pros
Pleasant natural scent
Creates a fresh, leafy aroma that many find appealing and reminiscent of nature.
Low irritation potential
At typical use levels, it has a low risk of causing skin irritation for most people.
Cons and cautions
No skin benefit
It only adds fragrance and does not moisturize, soothe, or improve skin health.
Fragrance allergen risk
Like many fragrance ingredients, it can trigger allergic reactions in sensitive individuals, leading to redness or itching.
Best for
- Anyone who enjoys fresh, green-scented products
- Those without known fragrance allergies
Use caution if
- Individuals with diagnosed fragrance allergies or sensitive skin that reacts to scented products
Usage tips
Safety summary
Cis-3-Hexenyl Isovalerate is considered safe for use in cosmetics at typical concentrations. The main risk is skin sensitization in individuals with fragrance allergies, which is uncommon but possible.
Research notes
Research focuses on its sensory properties and safety profile. It is not associated with significant toxicity or health concerns when used as intended in cosmetic products.
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 set by fragrance safety standards.
- Common uses
- Fragranced skincare, Perfumes, Body lotions, Cleansers
- Environmental note
- As a synthetic compound, it is produced through chemical synthesis, which has a lower environmental footprint compared to harvesting natural plant materials for similar scents.
Good to know
- This ingredient is often listed simply as 'fragrance' or 'parfum' on labels, so it may not appear by name.
- It is approved for use in cosmetics by major regulatory bodies when used within safe concentration limits.
Common questions
What is Cis-3-Hexenyl Isovalerate in beauty products?
Cis-3-Hexenyl Isovalerate is a man-made ingredient that smells like freshly cut grass or green leaves. It's added to skincare and beauty products to give them a pleasant, natural-smelling fragrance. It doesn't provide any skin benefits like moisturizing or anti-aging—it's purely for scent.
What does Cis-3-Hexenyl Isovalerate do in a beauty product?
In a cosmetic product, it acts solely as a fragrance ingredient. It evaporates from the skin's surface, releasing its scent. It does not interact with the skin's biology or provide any functional benefit beyond odor.
Is Cis-3-Hexenyl Isovalerate safe for most people?
Cis-3-Hexenyl Isovalerate is considered safe for use in cosmetics at typical concentrations. The main risk is skin sensitization in individuals with fragrance allergies, which is uncommon but possible.
Who should be careful with Cis-3-Hexenyl Isovalerate?
Individuals with diagnosed fragrance allergies or sensitive skin that reacts to scented products
Research sources
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.