DEA Stearate
AKA “Diethanolamine Stearate, DEA Monostearate”
Synthetic
Ingredient Facts
Dea stearate
AKA: Diethanolamine Stearate, DEA Monostearate
Synthetic · Cleansing · EWG: 4
Plant-Derived Synthetic
Cleanser
Emulsifier
Synthetic
Clean
Science: Origin: Botanic/Natural Safety Ratings: CIR: Safe as used
CAS #
111-41-1
Form
Liquid
See origin →
Functions
Emulsifier
Forces oil and water to stay mixed instead of separating into layers. The unsung hero holding your lotion together.
Cleansing
Makes oil and water mix so dirt, makeup, and sunscreen can actually be washed away. The reason your face wash foams.
Viscosity Controlling
Traditional Use
Developed in the mid-20th century as a synthetic surfactant derived from stearic acid and diethanolamine. Adopted by the cosmetics industry as an emulsifier and thickening agent to replace natural soap-based formulations.
Skin Types
●all-skin-types
Best For
General
Melanin-Rich Skin
Suitable
Pregnancy & Breastfeeding Safe
Caution
EWG
4
CIR
Safe w/Qualifications
Pregnancy
Caution
Restricted By
CIR Safety Findings
Not a Sensitizer
medical-approval
all-shades-safe
Regulatory Agencies
Verified Feb 2026
Data: CosIng · EWG · CIR