Soy Acid
AKA “Soybean Fatty Acid”
Acid
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Ingredient Facts
Soy acid
AKA: Soybean Fatty Acid
Acid · Emollient · EWG: 4
Synthetic
Emollient
Cleanser
Emulsifier
Skin Conditioner
Acid
Not Clean
Fatty acids, soya
CAS #
68308-53-2
Form
Liquid
State
Solid
See origin →
Functions
Refatting
Emollient
Fills in the tiny cracks between skin cells to make everything feel smooth and soft. The "silky finish" ingredient.
Emulsifying
Forces oil and water to stay mixed instead of separating into layers. The unsung hero holding your lotion together.
Locks In Moisture
Traditional Use
A modern cosmetic ingredient derived from soybean oil through hydrolysis or saponification. Used in skincare formulations as an emollient and to improve skin barrier function.
Skin Types
●all-skin-types
Best For
Dryness
Pregnancy & Breastfeeding Safe
Yes
Verified Jun 2026
Data: CosIng · EWG · CIR