Science
Mechanism of Action
This ingredient functions by creating a smooth, lubricated skin surface, acting as a non-occlusive emollient to prevent dryness and impart a soft feel. It excels as a solvent for lipophilic components like UV filters and aromatic oils, thereby enhancing pigment dispersion. Crucially, it acts as a penetration enhancer, optimizing the transdermal delivery of active compounds. At lower concentrations, it can form liquid crystal structures (oleosomes) with specific emulsifiers, which aids in dissolving poorly water-soluble actives, controlling their release, and safeguarding fragile molecules. It also contributes to improved skin elasticity and a desirable velvety skin texture.
Research
Clinical Evidence
Medium confidence2.5%
Key findings
- 01 Demonstrated a significant increase in the skin permeation of various drug substances, including calcipotriol and betamethasone dipropionate (commonly used in psoriasis treatments), when compared to isopropyl myristate in controlled pig ear skin models.
- 02 Observed an inverse relationship between concentration and skin permeation enhancement; higher concentrations within this range led to reduced amounts of active ingredient permeating the skin, suggesting optimal enhancer activity at lower percentages.
Transparency
Dusting Analysis
Insufficient data available in research to determine dusting characteristics or specific thresholds for this ingredient.
The Formula
Formulation
Stability
PPG-15 Stearyl Ether Benzoate exhibits remarkable resistance to extreme environmental conditions, maintaining stable activity across a wide pH range from 2.0 to 10.0. A 10% solution typically registers a pH between 6.0 and 8.0. It is fully compatible with all natural and synthetic oils and waxes. Its non-ionic nature allows for versatile formulation with non-ionic, anionic, and cationic surface-active agents. While insoluble in water, propylene glycol, and glycerin, it readily dissolves in oils, mineral oil, and ethyl alcohol. Formulations frequently include 0.05% to 0.1% BHT as an antioxidant to preserve stability.
Synergies
- Compatible with all types of natural and synthetic oils and waxes.
- Can be formulated with non-ionic, anionic, and cationic surface active agents.
- Forms liquid crystal structures (oleosomes) with specific emulsifiers at low concentrations to improve active dissolution and release.
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel concluded that PPG-11 and PPG-15 Stearyl Ether (the non-benzoate derivative) are safe as used in cosmetics, an assessment reaffirmed in 2022. While typical use concentrations for these derivatives range from 2% to 10% (not exceeding 25%), the Scientific Committee on Consumer Safety (SCCS) has indicated that esters of benzoic acid, such as PPG-15 Stearyl Ether Benzoate, require individual evaluation. As of now, a specific SCCS opinion for this ester has not been published.
Your Skin
Skin Compatibility
Our Assessment
Verdict
PPG-15 Stearyl Ether Benzoate is a valuable multi-functional ingredient, prized for its emollient properties, its ability to significantly enhance active ingredient penetration, and its robust stability across a wide range of formulations.
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References
Sources