Arachidic Acid
AKA “Icosanoic acid, EICOSANOIC ACID, 506-30-9, Arachic acid, n-Eicosanoic acid, PQB8MJD4RB, C20:0, DTXSID1060134, CHEBI:28822
Synthetic
Ingredient Facts
Arachidic acid
AKA: Icosanoic acid, EICOSANOIC ACID, 506-30-9, Arachic acid, N-Eicosanoic acid, PQB8MJD4RB, C20:0, DTXSID1060134, CHEBI:28822
Synthetic · Buffering · EWG: 1
Synthetic
Skin Conditioner
Synthetic
Clean
Icosanoic acid is a C20 striaght-chain saturated fatty acid which forms a minor constituent of peanut (L. arachis) and corn oils. Used as an organic thin film in the production of liquid crystals for a wide variety of technical applications. It has a role as a plant metabolite. It is a long-chain fatty acid and a straight-chain saturated fatty acid. It is a conjugate acid of an icosanoate.
Formula
C20H40O2
Mol. Weight
312.50
CAS #
506-30-9
Form
Liquid
State
Other Solid; Liquid
See origin →
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.
Buffering
Removes Impurities
Emulsifier
Adds Opacity
Cleansing Surfactant
Mixes Oil & Water
Traditional Use
A naturally occurring fatty acid found in small quantities in various plant and animal sources. Used in modern cosmetics as an emulsifier and skin conditioning agent, synthesized for consistency and purity.
Skin Types
all-skin-types
Best For
Dryness
Pregnancy & Breastfeeding Safe
Yes
EWG
1
CIR
Safe
Pregnancy
Yes
CIR Safety Findings
Not a Sensitizer
all-shades-safe
Regulatory Status
USApermitted
EUrestricted
JAPANrestricted
CANADArestricted
Verified Jun 2026
Data: PubChem · CosIng · EWG · CIR