Ingredient review
Cis-3-Hexenyl Formate
INCI: CIS-3-HEXENYL FORMATE
A synthetic fragrance ingredient that adds a fresh green scent but offers no direct skincare benefit and may be a concern for those with fragrance sensitivities.
In plain English
Cis-3-Hexenyl Formate is a man-made chemical that smells like freshly cut grass or green leaves. It is added to skincare and beauty products purely for its pleasant, natural-smelling fragrance. It does not moisturize, treat, or improve the skin in any way. Its only job is to make the product smell nice.
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 Formate 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 Formate.
- 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
Cis-3-Hexenyl Formate is a synthetic ester, meaning it is created in a lab by combining an alcohol (cis-3-hexenol) with formic acid. It belongs to a family of compounds known as 'green notes' because they mimic the scent of green vegetation.
How it works
In a cosmetic product, Cis-3-Hexenyl Formate works solely as a fragrance ingredient. It evaporates from the skin's surface, releasing its scent molecules into the air. It does not interact with the skin's biology or provide any functional benefit like hydration or protection.
Pros
Pleasant Scent
Imparts a natural, fresh green aroma that many find appealing and reminiscent of nature.
Low Irritation Potential for Most
For the general population without fragrance sensitivities, it is considered to have a low risk of skin irritation at typical use levels.
Cons and cautions
No Skincare Benefit
This ingredient is purely for scent. It does not hydrate, soothe, or improve the skin's health in any way.
Potential Allergen
As a fragrance ingredient, it can cause contact dermatitis or allergic reactions in people with sensitive skin or fragrance allergies.
Best for
- People who enjoy a fresh, green scent in their skincare
- Those without known fragrance allergies
Use caution if
- Individuals with sensitive skin or a known allergy to fragrance ingredients
Usage tips
Safety summary
Cis-3-Hexenyl Formate is considered safe for use in cosmetics at typical concentrations by fragrance safety panels. However, like all fragrance ingredients, it has the potential to cause allergic reactions in susceptible individuals.
Research notes
Research on Cis-3-Hexenyl Formate focuses on its sensory properties and safety as a fragrance material. Studies confirm its low acute toxicity and skin irritation potential, but it is recognized as a potential allergen in patch tests for fragrance-sensitive individuals.
Common label clues
- Typical concentration
- Typically used at very low levels, often below 1% in finished products.
- Regulatory status
- Approved for use as a fragrance ingredient by major regulatory bodies including the International Fragrance Association (IFRA) and the U.S. Food and Drug Administration (FDA), subject to safety guidelines.
- Common uses
- Fragranced skincare, Perfumes, Body lotions, Cleansers
- Environmental note
- As a synthetic compound, its environmental impact is primarily related to its production process and biodegradability. It is generally considered to be biodegradable.
Good to know
- Cis-3-Hexenyl Formate is often used to create 'green' or 'leafy' accords in perfumery.
- It is a common ingredient in products designed to smell like cucumber, grass, or green tea.
Common questions
What is Cis-3-Hexenyl Formate in beauty products?
Cis-3-Hexenyl Formate is a man-made chemical that smells like freshly cut grass or green leaves. It is added to skincare and beauty products purely for its pleasant, natural-smelling fragrance. It does not moisturize, treat, or improve the skin in any way. Its only job is to make the product smell nice.
What does Cis-3-Hexenyl Formate do in a beauty product?
In a cosmetic product, Cis-3-Hexenyl Formate works solely as a fragrance ingredient. It evaporates from the skin's surface, releasing its scent molecules into the air. It does not interact with the skin's biology or provide any functional benefit like hydration or protection.
Is Cis-3-Hexenyl Formate safe for most people?
Cis-3-Hexenyl Formate is considered safe for use in cosmetics at typical concentrations by fragrance safety panels. However, like all fragrance ingredients, it has the potential to cause allergic reactions in susceptible individuals.
Who should be careful with Cis-3-Hexenyl Formate?
Individuals with sensitive skin or a known allergy to fragrance ingredients
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.