Science
Mechanism of Action
This compound primarily functions through two key mechanisms: pH buffering and metal ion chelation. As a buffering agent, it precisely stabilizes the skin's natural pH, which is fundamental for maintaining a robust skin barrier and protecting against environmental aggressors. Concurrently, its chelating properties allow it to bind to multivalent metal ions, such as copper (Cu2+) and iron (Fe2+), sequestering them to prevent unwanted interactions with other ingredients. This chelation is critical for preserving product integrity, preventing degradation, and maintaining visual consistency within the formula.
Research
Clinical Evidence
Insufficient-data confidenceN/A
Transparency
Dusting Analysis
The Formula
Formulation
Stability
Disodium Pyrophosphate is a white, water-soluble solid that demonstrates optimal stability and function within an acidic to slightly acidic pH range of 3.7 to 5.0, as indicated by its 1% aqueous solution. This characteristic allows it to effectively regulate and maintain pH levels in formulations. It exhibits insolubility in ethanol.
Conflicts
- strong oxidizing agents
- bases
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel has determined Disodium Pyrophosphate, along with other phosphoric acid salts, to be safe for use in cosmetic applications when properly formulated to be non-irritating. In the United States, it is also classified as Generally Recognized As Safe (GRAS) for food consumption by the FDA. The European Food Safety Authority (EFSA) has established an acceptable daily intake (ADI) for phosphates, expressed as phosphorus, at 40 mg/kg body weight per day. However, it is important to note that in its concentrated or dry powder form, Disodium Pyrophosphate can act as an irritant to the skin, eyes, and mucous membranes, necessitating appropriate protective handling procedures.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Disodium Pyrophosphate is a valuable ingredient, primarily contributing to cosmetic formulation integrity and performance through its precise buffering and metal ion chelating capabilities.
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