“alpha-Isomethyl Ionone?”Here!
Hasn’t appeared in a scanned product yet.
In personal care
A synthetic fragrance ingredient with a soft violet and floral scent, used widely in perfumery and scented cosmetics.
Why it’s used
It contributes a floral note and helps round out fragrance blends in products from lotions to shampoos.
What the evidence says
It is one of a defined list of fragrance substances that the EU has identified as capable of causing skin sensitization (allergic contact dermatitis) in some users, based on case reports and patch-test data. Most people are not sensitized to it, but because sensitization is possible, it must be disclosed by name on labels above certain concentrations.
Context
Under EU cosmetics labeling rules, its presence must be listed by name when concentrations exceed 0.001% in leave-on products and 0.01% in rinse-off products, reflecting that reaction risk is concentration-dependent.
Rumors
Alpha-isomethyl ionone is safe in cosmetics.
Not gradedhealth and safety evidence
Sources cited — no verdict reached.
What was measured is not yet noted.
- Evaluation of the developmental toxicity of alpha-iso-methylionone in rats (Peer-reviewed) · Funding not checked
Who’s saying this
- lush.com — we couldn’t open the site to see who runs it
Alpha-isomethyl ionone causes allergic skin reactions.
We haven’t found evidence strong enough to support this or rule it out.
What was measured is not yet noted.
Who’s saying this
- Paula's Choice — a brand: sells its own skincare products
How we know who this is
- “Copyright © Paula's Choice GENERAL CONDITIONS PRIVACY POLICY COOKIE POLICY COOKIE SETTINGS” (their page)
- “Our formulas do what they say, every single time.” (their page)
- Paula's Choice — a brand: sells its own skincare products
Alpha-isomethyl ionone is gentle and conditions the skin.
Does not support — suggestivehealth and safety evidence
Measured as an outcome.
- ALPHA-ISOMETHYL IONONE (Database) · Funding not checked
- Opinion on Fragrance Allergens in Cosmetic Products (Regulatory) · Funding not checked
Who’s saying this
- OLIVE TREE PEOPLE — a brand: sells olive-based waterless beauty and wellness products under its own brands
How we know who this is
- “OLIVE TREE PEOPLE is, as we affectionately say, our "Mother Tree", around which many more trees – our love brands – grow.” (their page)
Alpha-isomethyl ionone is a human toxicant or allergen.
Supports — suggestivehealth and safety evidence
What was measured is not yet noted.
- Opinion on Fragrance Allergens in Cosmetic Products (Regulatory) · Funding not checked
- Evaluation of the developmental toxicity of alpha-iso-methylionone in rats (Peer-reviewed) · Funding not checked
Who’s saying this
- ewg.org — we couldn’t open the site to see who runs it