Science
Mechanism of Action
This compound exerts its effects through several components. Aluminum hydroxide contributes opacifying, emollient, and skin-protecting benefits by forming a protective barrier on the skin's surface. Aluminum sulfate, and specifically sodium aluminum sulfate, are recognized for their antiperspirant, astringent, and hemostatic (blood-clotting) actions. Collectively, the ingredient functions as an abrasive and absorbent, managing surface oils and contributing to skin texture refinement.
Research
Clinical Evidence
Low confidenceN/A
Transparency
Dusting Analysis
This ingredient, specifically its sodium aluminum sulfate component, is commonly incorporated into dusting powders at concentrations ranging from 10% to 20%. In this application, it is used to manage wound exudate and minor bleeding, indicating its absorbent and hemostatic capabilities on the skin surface.
The Formula
Formulation
Stability
The ingredient, particularly its aluminum sulfate components, exhibits optimal stability and efficacy for coagulation around a pH of 7, with efficient activity observed between 6 and 8. A broader functional pH range extends from 5.5 to 7.5. Solutions formed by sodium aluminum sulfate tend to be acidic.
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) has deemed alumina and aluminum hydroxide, key components, as safe for use in cosmetic applications. The FDA recognizes aluminum hydroxide as Generally Regarded As Safe (GRAS) for direct food additive and over-the-counter drug use. European Food Safety Authority (EFSA) assessments for related aluminum sulfates (E 520–523) and sodium aluminum phosphate (E 541) indicate no safety concerns at currently authorized food additive levels. While a specific maximum cosmetic concentration for the composite ingredient is not defined, sodium aluminum sulfate has been safely employed in dusting powders at 10-20% concentrations on wounds.
Your Skin
Skin Compatibility
Our Assessment
Verdict
This multi-functional ingredient is valuable for formulations targeting oil control, skin protection, and specific abrasive or absorbent needs, particularly beneficial for normal and oily skin types.
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References
Sources