3-METHYL-5-(2,2,3-TRIMETHYL-3-CYCLOPENTENYL)PENT-4-EN-2-OL
3-METHYL-5-(2,2,3-TRIMETHYL-3-CYCLOPENTENYL)PENT-4-EN-2-OL
Is 3-METHYL-5-(2,2,3-TRIMETHYL-3-CYCLOPENTENYL)PENT-4-EN-2-OL safe in skincare?
EU CosIng Annex III
Based on
- Reference: European Union, 2026
Annex III · EU Cosmetics Regulation Annex III, entry 339: permitted only under the listed conditions. Conditions: The presence of the substance shall be indicated in the list of ingredients referred to in Article 19(1), point (g), when its concentration exceeds: — 0,001 % in leave-on products — 0,01 % in rinse-off products.
Is 3-METHYL-5-(2,2,3-TRIMETHYL-3-CYCLOPENTENYL)PENT-4-EN-2-OL classified as a carcinogen?
Only four bodies count here: IARC, EU CLP, US NTP and California Prop 65.
Not classified by IARC, EU CLP, US NTP, or California Prop 65.
How is 3-METHYL-5-(2,2,3-TRIMETHYL-3-CYCLOPENTENYL)PENT-4-EN-2-OL regulated?
Cosmetic ingredient
Not found on any prescription-drug, professional-treatment, or US OTC monograph list, so it is treated as a cosmetic ingredient. This is a passive default ("not on any known restricted list"), not an individually verified positive finding.
Sources (1)
- Reference: European Union, 2026
Red does not mean poison. Preservatives that stop a product going off, UV filters and fragrance can land on yellow or red depending on their score.
Green does not mean right for you. Skin and allergies differ from person to person. Treat the color as a starting point.