Arachidonic Acid
AKA “(5Z, 14Z)-icosa-5, 14-tetraenoic acid, (all-Z)-5, 14-Eicosatetraenoic acid, cis-5, 14Z-eicosatetraenoic acid”
Synthetic
Ingredient Facts
Arachidonic acid
AKA: (5Z, 14Z)-icosa-5, 14-tetraenoic acid, (all-Z)-5, 14-Eicosatetraenoic acid, Cis-5, 14Z-eicosatetraenoic acid
Synthetic · Antioxidant · EWG: 1
Synthetic
Antioxidant
Emollient
Skin Conditioner
Synthetic
Clean
A naturally-derived fatty acid that softens and conditions skin, helping to maintain its natural moisture barrier and improve texture.
Formula
C20H32O2
Mol. Weight
304.50
CAS #
506-32-1
Form
Liquid
State
Liquid; [Merck Index]
See origin →
Functions
Emollient
Fills in the tiny cracks between skin cells to make everything feel smooth and soft. The "silky finish" ingredient.
Antioxidant
Fights free radicals — the unstable molecules from UV, pollution, and stress that break down collagen and cause premature aging.
Locks In Moisture
Traditional Use
An omega-6 polyunsaturated fatty acid identified in the early 20th century; used in skincare for its role in skin barrier function and anti-inflammatory properties.
Skin Types
●all-skin-types, gentle
Best For
Dryness
Melanin-Rich Skin
Suitable
Pregnancy & Breastfeeding Safe
Yes
Appendix to the Report on Arachidonic Acid
Cosmetic Ingredient Review (CIR) Expert Panel
International Journal of Toxicology
Final Report on the Safety Assessment of Arachidonic Acid
Cosmetic Ingredient Review (CIR) Expert Panel
International Journal of Toxicology
Arachidonic Acid
Environmental Working Group (EWG)
EWG Skin Deep Cosmetics Database
Verified Feb 2026
Data: PubChem · CosIng · EWG · CIR