Arachidonic Acid

AKA: 506-32-1, (5Z, 8Z, 11Z, 14Z)-icosa-5, 8, 11, 14-tetraenoic acid, (all-Z)-5, 14-Eicosatetraenoic acid, Cis-5, 5Z, 14Z-eicosatetraenoic acid, 5, All-cis-5, 14-eicosatetraenoic acid
Synthetic
Emollient
Skin Conditioner
Acid
Clean
Icosa-5,8,11,14-tetraenoic acid
Formula
C20H32O2
Mol. Weight
304.50
CAS #
506-32-1
Form
Liquid
State
Liquid; [Merck Index]
Functions
Skin Conditioning
A catch-all term for ingredients that improve how skin looks and feels — softer, smoother, more supple. The workhorse behind most moisturizers.
Emollient
Fills in the tiny cracks between skin cells to make everything feel smooth and soft. The "silky finish" ingredient.
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.
EWG
1
CIR
Reviewed by CIR
Pregnancy
Yes
CIR Safety Findings
Not a Sensitizer
ewg-1
pregnancy-nursing-safe
all-shades-safe
Regulatory Status
USAunder review
EUrestricted
JAPANrestricted
CANADArestricted
Skin Types
all-skin-types, gentle
Best For
Dryness
Pregnancy & Breastfeeding Safe
Yes
The paper trail
🔬Peer-reviewed1 paper
⚖️Regulatory1 listing
🛡️Safety-assessed2 reviews
Counts, not a verdict. A listing isn't a study. The trail, you decide.
Verified Jun 2026
Data: PubChem · CosIng · EWG · CIR