Science
Mechanism of Action
As a fatty acid ester, Methyl Hydroxystearate primarily operates as an emollient and skin conditioning agent. It enhances the skin's barrier function by providing a smoothing and softening effect. Furthermore, its structural properties allow it to act as a binder and thickening agent within cosmetic formulations, contributing to product consistency and sensory feel.
Research
Clinical Evidence
Low confidenceN/A
Transparency
Dusting Analysis
The Formula
Formulation
Stability
Methyl Hydroxystearate demonstrates stability under normal temperature and pressure conditions. While specific optimal pH ranges are not precisely defined, stability is noted around pH 4 or at a neutral pH. It is insoluble in water but exhibits solubility in oils and potentially limited solubility in some organic solvents.
Conflicts
- Strong oxidizers
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel has affirmed the safety of Hydroxystearic Acid, the parent compound of Methyl Hydroxystearate, for use in cosmetics. Although formulations containing 7% hydroxystearic acid induced irritation under exaggerated semi-occlusive and occlusive patch test conditions, these effects were not considered indicative of general irritation during typical product use. Methyl 12-Hydroxystearate is recognized by the FDA as a Food Contact Substance (FCS). EWG Skin Deep assesses Methyl Hydroxystearate with 'LOW' concern across categories including cancer, allergies, immunotoxicity, and reproductive toxicity.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Methyl Hydroxystearate is a valuable emollient and skin conditioning agent, enhancing skin smoothness and contributing to formulation stability, particularly beneficial for dry skin types due to its softening properties.
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References
Sources