Science
Mechanism of Action
Upon contact with skin moisture, it rapidly hydrolyzes into aluminum hydroxide, which can form sweat duct plugs for antiperspirant effects, and isopropyl alcohol. In formulations, it acts as a Lewis acid catalyst or reacts with fatty acids to gel the oil phase.
Research
Clinical Evidence
Medium confidenceN/A
Key findings
- 01 Clinical studies indicate concentrations between 5-10% can effectively act as a catalyst for gelling and a cross-linking agent for viscosity control, or function as an antiperspirant by forming occlusive aluminum hydroxide.
Transparency
Dusting Analysis
The Formula
Formulation
Stability
This ingredient is extremely moisture-sensitive, requiring formulation in anhydrous environments; water exposure causes immediate hydrolysis and precipitation.
Conflicts
- Water
- Protic solvents
- Carboxylic acids
- Strong oxidizers
Safety
Safety Profile
While not reviewed by the CIR, its hydrolysis products (aluminum hydroxide, isopropanol) are considered 'Safe as Used.' The SCCS deems general aluminum compounds safe up to 6.25% in non-spray deodorants, though the raw form can cause serious eye irritation and is flammable.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Aluminum Isopropoxide is a valuable, specialized ingredient for anhydrous formulations, acting as a gelling agent and antiperspirant, best suited for oily skin types.
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References
Sources