Sodium Stearoyl Lactylate

Sodium Stearoyl Lactylate 1
molecular structure · PubChem CID 23671849
AKA: 25383-99-7, Sodium stearoyl-2-lactylate, Sodium 2-stearoyllactate, Sodium stelate, Sodium stearyl-2-lactylate, EMULSILAC SK
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Synthetic
Skin Conditioner
Synthetic
Clean
OriginDerived from stearic acid and lactic acid, both produced from natural fats and carbohydrate fermentation respectively. Synthesized through esterification reaction combining stearic acid with sodium lactylate under controlled conditions.
The Panel concluded that the following alkanoyl lactyl lactate salts are safe in cosmetics in the present practices of use and concentration described in the safety assessment, when formulated to be non-irritating and non-sensitizing, which may be based on a QRA or other accepted methodologies...Sodium Stearoyl Lactylate...
Solubility Insoluble in water. Soluble in ethanol
Formula
C24H43NaO6
Mol. Weight
450.60
CAS #
25383-99-7, 18200-72-1
State
Dry Powder
Skin Types
●all-skin-types
Best For
General
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.
Emulsifier
Mixes Oil & Water
The paper trail
🔬Peer-reviewed1 paper →
⚖️Regulatory0 listings
🛡️Safety-assessed2 reviews →
Counts, not a verdict. A listing isn't a study. The trail, you decide.
EWG
1
CIR
Insufficient
Pregnancy
—
CIR Safety Findings
Not a Skin Irritant
1 study / 1 not irritating (CIR 774)
Not an Eye Irritant
1 study / 1 not irritating (CIR 774)
Mixed Sensitization Results
2 studies / 1 sensitizing / 1 not sensitizing / plus 1 case report (CIR 774)
Concentration Guide
CIR lists it as not reported to be in use.
CIR · report published 2024
Regulatory Status
USAunder review
CANADA✔ permitted
Regulatory Agencies
Verified Jun 2026
Data: PubChem · CosIng · EWG · CIR