Science
Mechanism of Action
As an emollient, Methyl Stearate creates a non-occlusive film on the skin's surface, preventing trans-epidermal water loss and preserving the skin's natural moisture balance. It also acts as a conditioning agent, contributing to a soft and smooth skin texture and aiding in the uniform blending of oil and water phases within formulations.
Research
Clinical Evidence
Low confidenceN/A
Transparency
Dusting Analysis
The Formula
Formulation
Stability
Methyl Stearate is stable under normal conditions but can undergo hydrolysis in highly alkaline environments, specifically at pH values exceeding 8.5. It is insoluble in water but readily dissolves in organic solvents such as ethanol, ether, and chloroform. Proper storage in a cool, dry, ventilated area, away from heat and direct sunlight, is advised to maintain stability.
Conflicts
- strong oxidizing agents
- strong acids
- caustic solutions
- alkali metals
- hydrides
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel has deemed Methyl Stearate, as part of the broader 'Fatty Acids and Fatty Acid Salts' category, safe for use in cosmetics under current practices and concentrations, provided formulations are non-irritating and non-sensitizing. While an industrial Safety Data Sheet (SDS) noted potential carcinogenicity at concentrations of 0.1% or greater for industrial handling, cosmetic regulatory bodies like CIR have not identified it as a carcinogen in cosmetic formulations, where exposure routes and concentrations differ significantly.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Methyl Stearic Acid is a valuable emollient and skin conditioning agent, particularly beneficial for dry and normal skin types due to its low irritancy, though individuals with acne-prone skin should consider its medium comedogenicity.
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