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Sodium Isostearoyl Lactylate
AKA “Sodium isostearoyl-2-lactylate, EINECS 266-533-8, PATIONIC ISL, PRIAZUL 2133, Isooctadecanoic acid, 2-(1-carboxyethoxy)-1-methyl-2-oxoethyl ester, sodium salt, Sodium 2-(1-carboxylatoethoxy)-1-methyl-2-oxoethyl isooctadecanoate”
Synthetic
Ingredient Facts
Sodium isostearoyl lactylate
AKA: Sodium isostearoyl-2-lactylate, EINECS 266-533-8, PATIONIC ISL, PRIAZUL 2133, Isooctadecanoic acid, 2-(1-carboxyethoxy)-1-methyl-2-oxoethyl ester, Sodium salt, Sodium 2-(1-carboxylatoethoxy)-1-methyl-2-oxoethyl isooctadecanoate
Synthetic · Cleansing · EWG: 4
Plant-Derived
Cleanser
Emulsifier
Chemical Exfoliant
Plant Oil
Synthetic
Clean
A gentle cleanser derived from natural sources that helps remove impurities while keeping moisture locked in your skin.
Formula
C24H43NaO6
Mol. Weight
450.60
CAS #
66988-04-3
See origin →
Functions
Cleansing
Makes oil and water mix so dirt, makeup, and sunscreen can actually be washed away. The reason your face wash foams.
Emulsifying
Forces oil and water to stay mixed instead of separating into layers. The unsung hero holding your lotion together.
Cleansing Surfactant
Emulsifier
Removes Impurities
Mixes Oil & Water
Traditional Use
A modern synthetic emulsifier and conditioning agent developed in the late 20th century for cosmetics. Combines stearic acid derivatives with lactic acid to create stable, skin-conditioning products.
Skin Types
●all-skin-types
Best For
General
Melanin-Rich Skin
Suitable
Pregnancy & Breastfeeding Safe
Yes
EWG
4
CIR
Safe
Pregnancy
Yes
CIR Safety Findings
medical-approval
all-shades-safe
Regulatory Status
USA✔ permitted
EU⚠ restricted
JAPAN⚠ restricted
CANADA⚠ restricted
Verified Feb 2026
Data: PubChem · CosIng · EWG · CIR