Science
Mechanism of Action
This ingredient functions principally as a potent solvent, effectively dissolving various active compounds, fragrances, and insoluble ingredients, thereby enhancing product spreadability and absorption into the skin. It contributes to formulations with rapid drying times, promoting a lightweight and non-greasy feel. Additionally, SD Alcohol 40-B exhibits astringent properties, temporarily constricting pores, and acts as both an antimicrobial agent and a preservative. However, its mechanism also involves stripping the skin of its essential natural lipids and potentially degrading the skin's protective barrier, which can result in dehydration, irritation, and increased sensitivity over time.
Research
Clinical Evidence
Medium confidence12%
Transparency
Dusting Analysis
The Formula
Formulation
Stability
Ethanol SDA 40B is a high-purity denatured alcohol. Vapors are capable of forming explosive mixtures with air. It requires strict avoidance of heat, flames, sparks, extreme temperatures, and direct sunlight.
Conflicts
- Alkali metals
- Ammonia
- Oxidizing agents
- Peroxides
- Strong Inorganic Acids
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel has determined SD Alcohol 40-B, specifically when denatured with t-Butyl Alcohol and Denatonium Benzoate, to be safe for cosmetic use at concentrations ranging from 0.05% to 12%. The FDA recognizes denatured alcohol as safe for over-the-counter products, including sunscreens and antimicrobial drug products. However, the CIR Expert Panel noted insufficient data to support the safety of alcohols denatured with Quassin, Brucine, and Brucine Sulfate.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Despite its functional benefits as a solvent and quick-drying agent, SD Alcohol 40-B significantly impairs the skin's protective barrier and moisture balance, rendering it unsuitable for precision skincare formulations that prioritize skin health and integrity.
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