Science
Mechanism of Action
It functions primarily as an antimicrobial preservative, effectively inhibiting the development and proliferation of microorganisms in aqueous cosmetic products, thereby maintaining product stability and safety.
Research
Clinical Evidence
Insufficient-data confidenceN/A
Transparency
Dusting Analysis
The Formula
Formulation
Stability
Specific information regarding optimal pH range for stability or detailed formulation considerations beyond its general regulatory status was not found.
Safety
Safety Profile
Mercury and its compounds, including Phenyl Mercuric Bromide, are largely prohibited or severely restricted in cosmetic products globally due to their toxic effects and ability to penetrate human skin. They are associated with risks such as allergic reactions, skin irritation, and neurotoxic problems. The FDA permits only unavoidable trace amounts (less than 0.0001% or 1 ppm) in general cosmetics under good manufacturing practices. Historically, concentrations up to 0.0065% (65 ppm, calculated as mercury) were permitted as a preservative in eye products if no safe non-mercurial alternative was available; however, this allowance is under review, with the SCCS concluding in 2025 that such levels are not safe, leading to an expected prohibition in the EU. New York State and Singapore have also enacted strict bans or restrictions on mercury in cosmetics.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Due to its significant inherent toxicity and widespread global regulatory prohibition, Phenyl Mercuric Bromide should be entirely avoided in cosmetic and skincare formulations.
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References
Sources