Naturally derived fatty acid from castor oil pyrolysis; well-tolerated antifungal; low irritation potential at cosmetic concentrations; can be used in natural formulations.
Function & Common Use
Preservative, Antimicrobial, Antifungal
Preservatives
Antifungal foot creams, deodorants, nail treatments, hair care
Natural/Synthetic
Concentration Limits
0.2%
0.2% (as preservative in cosmetics)
None (GMP; also used as OTC antifungal drug up to 25%)
0.2%
Format restriction: None
Baby restriction: No
Pregnancy: No
IFRA: No
Frequently Asked Questions
Is Undecylenic Acid safe to use in skincare?
Undecylenic Acid has a Low concern rating from The Clean Sheet. Naturally derived fatty acid from castor oil pyrolysis; well-tolerated antifungal; low irritation potential at cosmetic concentrations; can be used in natural formulations.
Is Undecylenic Acid allowed in India?
Undecylenic Acid is currently classified as "Permitted" under Indian cosmetics regulations. The maximum permitted concentration is 0.2%.
What is Undecylenic Acid used for in cosmetics?
Undecylenic Acid functions as: Preservative, Antimicrobial, Antifungal. It is commonly found in: Antifungal foot creams, deodorants, nail treatments, hair care.
Can Undecylenic Acid cause an allergic reaction?
Yes. Undecylenic Acid has an allergen flag (No). If you have sensitive skin or known fragrance/contact allergies, patch-test products containing this ingredient before full use.
Is Undecylenic Acid safe for babies?
Undecylenic Acid has baby/child restrictions: No. Avoid using products containing this ingredient on infants unless specifically formulated and labelled for baby use.
Regulatory Status
EU Annex: Annex V (permitted preservative)
Identifiers
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