Science
Mechanism of Action
This ingredient operates as a strong base, primarily adjusting and stabilizing the pH of a formulation. When applied to the skin, its alkaline nature contributes to a mild exfoliating effect, promoting cellular turnover, and acts as a conditioning agent to enhance skin texture, resulting in a soft and smooth feel.
Research
Clinical Evidence
Low confidenceN/A
Transparency
Dusting Analysis
No data available suggests Guanidine Carbonate is commonly associated with dusting issues in cosmetic formulations.
The Formula
Formulation
Stability
Guanidine Carbonate is a strong base with a pKa of 12.5 at 20°C, forming solutions with a high pH (e.g., 4% solution at pH 11.4). Its strong alkaline nature ensures stability in high pH environments.
Conflicts
- strong acids
Safety
Safety Profile
The CIR Expert Panel deems carbonate salts, including Guanidine Carbonate, safe in cosmetic applications when formulated to be non-irritating. While concentrations up to 49.5% were noted in hair relaxer formulations, this is not a general safe maximum for all cosmetic uses, especially skincare. It is classified as harmful if ingested and can cause skin and eye irritation, potentially leading to serious eye damage. It may also irritate the respiratory system. FDA has not explicitly stated its status for cosmetic use, though related carbonate salts are generally recognized as safe (GRAS) for food.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Guanidine Carbonate is a valuable ingredient primarily for its robust pH adjusting and buffering capabilities, though its mild exfoliant and skin conditioning benefits require careful formulation to mitigate potential irritation risks.
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