Science
Mechanism of Action
The antimicrobial action of SILVER MAGNESIUM ALUMINUM PHOSPHATE is primarily driven by its silver content. Silver ions interfere with bacterial ATP/ADP interconversion, induce oxidative stress, and bind to various cellular components, effectively disrupting bacterial growth. Additionally, the ingredient serves as a bulking agent. While not directly linked to cosmetic skin applications, general aluminum phosphates used as adjuvants can enhance immune responses through mechanisms like the depot effect and activation of pro-inflammatory pathways.
Research
Clinical Evidence
Low confidenceN/A
Key findings
- 01 Approved for use as an antimicrobial agent in polymers for food contact substances, with concentrations up to 2% by weight of the finished article, provided the silver content does not exceed 0.038% by weight. This evaluation is not specific to cosmetic skin applications.
Transparency
Dusting Analysis
The Formula
Formulation
Stability
The stability and effective solubility of SILVER MAGNESIUM ALUMINUM PHOSPHATE's individual components are highly pH-dependent. Silver phosphate is generally water-insoluble (0.00065 g/100 mL) but can dissolve in aqueous ammonia. Aluminum phosphate is largely insoluble at acidic pH, with solubility increasing under alkaline conditions, and aggregation of its nanoparticles is more pronounced below pH 7, with maximum aggregation around pH 5.5. Aluminum oxide is stable within a pH range of 4-8.5. Magnesium phosphates demonstrate buffering capabilities, remaining stable across a wide pH range of approximately 2.0 to 12.0.
Conflicts
- Significant pH shifts, which can induce precipitation of the aluminum phosphate component.
- Proteins, as silver can bind to reactive groups, leading to protein denaturation and precipitation.
- Amino groups, carboxyl groups, and imidazole groups, which can interact with silver ions.
Safety
Safety Profile
SILVER MAGNESIUM ALUMINUM PHOSPHATE has not been assessed for safety in cosmetics by the Cosmetic Ingredient Review (CIR) Expert Panel. The EWG Skin Deep database rates this ingredient as 'Unacceptable' for EWG VERIFIED products, citing concerns including moderate neurotoxicity, moderate persistence and bioaccumulation potential, and low-moderate developmental and reproductive toxicity. An FDA Food Contact Substance (FCS) notification exists for a similar 'Silver-magnesium-aluminum-phosphate glass' as an antimicrobial in polymers, limited to 2% by weight of the finished article (silver content not exceeding 0.038%), but this evaluation is not directly transferable to cosmetic skin safety.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Due to the absence of dedicated cosmetic safety assessments, the 'Unacceptable' EWG rating based on neurotoxicity and reproductive concerns, and the potential for bioaccumulation, this ingredient is not recommended for Moumoujus formulations.
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