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Moumoujus

STEAROYL LACTYLIC ACID.

Valuable CAS 14440-80-3 / SURFACTANT - CLEANSING, SURFACTANT - EMULSIFYING

Stearoyl Lactylic Acid is an organic acid primarily recognized through its salt derivative, Sodium Stearoyl Lactylate (SSL). While direct research on the standalone acid in cosmetics is limited, SSL, which incorporates the stearoyl lactylic acid structure, is a widely adopted ingredient prized for its multi-functional benefits in skincare and food applications.

Summary

Emulsifier Skin Conditioning Humectant Foam Booster Texture Enhancer

Science

Mechanism of Action

This ingredient functions primarily as an emulsifier, stabilizing mixtures of oil and water to ensure uniform product consistency and texture. On the skin, it acts as a conditioning agent, contributing to a smoother, softer feel, and as a mild humectant, supporting the skin's natural hydration barrier. Additionally, it can enhance foam generation in cleansing products and potentially aid in the dermal absorption of other active ingredients.

Research

Clinical Evidence

Low confidence
Effective range 3–20%
Optimal

N/A

Transparency

Dusting Analysis

Not commonly dusted

The Formula

Formulation

Solubility
Oil
Optimal pH 4 – 7
0 7 14

Stability

Optimal stability for Sodium Stearoyl Lactylate, the derivative of focus, is observed within a pH range of 4.0 to 7.0.

Safety

Safety Profile

CIR Status
Safe as used
Max tested
20%
Sensitization risk Low

The Cosmetic Ingredient Review (CIR) has assessed Sodium Stearoyl Lactylate (SSL), a derivative containing the stearoyl lactylic acid structure, as safe for cosmetic use at concentrations up to 20%. The FDA and European Food Safety Authority (EFSA) also deem SSL safe as a food additive, with EFSA specifically reporting no reproductive or carcinogenic effects from its ingestion. While specific data for standalone Stearoyl Lactylic Acid is sparse, the favorable safety profile of its widely used salt form is noteworthy.

Your Skin

Skin Compatibility

No Normal
Yes Dry
No Oily
Yes Sensitive
Irritancy Unknown
Comedogenicity Unknown

Our Assessment

Verdict

Valuable

While direct data on Stearoyl Lactylic Acid is scarce, its derivative, Sodium Stearoyl Lactylate, is a valuable multi-functional ingredient known for its emulsifying, conditioning, and hydrating properties in a wide range of formulations.

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