Science
Mechanism of Action
This hydrocolloid forms a breathable film on the skin, drawing and retaining moisture to minimize transepidermal water loss. Upon contact with divalent cations, it gels to create a physical matrix, facilitating sustained release of actives and providing a soothing sensation.
Research
Clinical Evidence
High confidenceN/A
Key findings
- 01 FAO/JECFA Monograph (2006) - Ammonium Alginate Identification Tests
- 02 CIR Safety Assessment of Polysaccharide Gums (2015)
- 03 PMC6699201; PMC9228514
Transparency
Dusting Analysis
While applicable in powder formulations, its key benefits in skincare, such as film-forming and moisture retention, are realized in liquid systems, where dusting is not a relevant factor for its function.
The Formula
Formulation
Stability
It is more stable in aqueous solutions than sodium alginate but is hygroscopic. Optimal dissolution and stability are within pH 5.0-8.0; it becomes unstable or precipitates below pH 3.0.
Conflicts
- Strong acids
- Strong alkalis
- Oxidizing agents
- Divalent metallic salts (e.g., calcium, magnesium)
Safety
Safety Profile
The 33% maximum concentration refers to polysaccharide gums as a category, specifically in powders. For liquid leave-on products, typical usage is significantly lower, often under 1%. FDA also affirms it as Generally Recognized As Safe (GRAS).
Your Skin
Skin Compatibility
Our Assessment
Verdict
A valuable multi-functional ingredient, Ammonium Alginate effectively hydrates, forms a protective film, and stabilizes formulations with a strong safety profile and broad skin compatibility.
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References
Sources