Arachidic Acid
AKA “Icosanoic acid, EICOSANOIC ACID, Arachic acid, n-Eicosanoic acid, C20:0”
Synthetic
Ingredient Facts
Arachidic acid
AKA: Icosanoic acid, EICOSANOIC ACID, Arachic acid, N-Eicosanoic acid, C20:0
Synthetic · Cleanser · EWG: 5
Synthetic
Emulsifier
Synthetic
Clean
A naturally-derived fatty acid that gently cleanses while creating a smooth, creamy texture. Helps products feel luxurious and look beautifully opaque.
Formula
C20H40O2
Mol. Weight
312.50
CAS #
506-30-9
Form
Liquid
State
Other Solid; Liquid
See origin →
Functions
Cleanser
Emulsifier
Forces oil and water to stay mixed instead of separating into layers. The unsung hero holding your lotion together.
Opacifier
Removes Impurities
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
Melanin-Rich Skin
Suitable
Pregnancy & Breastfeeding Safe
Yes
Verified Feb 2026
Data: PubChem · CosIng · EWG · CIR