Science
Mechanism of Action
It forms temporary, gel-like plugs within sweat ducts to physically block perspiration. As an astringent, it precipitates surface proteins, inducing local tissue contraction and a tightening sensation. Its acidic environment also inhibits odor-causing bacteria.
Research
Clinical Evidence
High confidenceN/A
Key findings
- 01 Topical application significantly reduced allergic skin prick reactions by inactivating IgE-binding epitopes.
- 02 Approved as an OTC skin protectant for minor cuts, promoting tissue constriction and hemostasis.
- 03 Used in historical medical applications to treat ulcers, demonstrating protein precipitation and antibacterial effects.
Transparency
Dusting Analysis
The Formula
Formulation
Stability
Highly acidic in aqueous solution (pH ~3.3 at 1%), it is hygroscopic and can form sulfuric acid upon contact with moisture. It is stable at room temperature.
Conflicts
- Strong bases
- Strong oxidizing agents
- Alkalis
- Sodium hypochlorite
- Most metals (corrosive)
Safety
Safety Profile
Designated as GRAS by the FDA for food use and approved as an OTC drug active up to 63%. SCCS suggests limits for aluminum compounds up to 6.25% in non-spray deodorants and 10.6% in sprays.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Aluminum Sulfate is a valuable active for formulations targeting perspiration control, astringency, and minor skin protection, with a well-established safety profile at approved concentrations.
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References
Sources