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Moumoujus

POTASSIUM PHENOXIDE.

Avoid CAS 100-67-4 / ANTIMICROBIAL

Potassium phenoxide is a potent inorganic base crucial for various industrial chemical syntheses, functioning as a nucleophile and catalyst in organic reactions. Despite its utility as a precursor for materials like polycarbonates and salicylic acid, its strong corrosive and toxic properties render it unequivocally unsuitable for skincare applications.

Summary

Science

Mechanism of Action

On the skin, potassium phenoxide, with its profoundly basic nature (typically pH 11-12), initiates severe tissue damage. Its action parallels that of strong alkalis such as potassium hydroxide, inducing saponification of cellular membrane lipids and denaturation of structural proteins like keratin and collagen, ultimately leading to significant tissue destruction and dehydration.

Research

Clinical Evidence

Low confidence
Effective range N/A
Optimal

N/A

Transparency

Dusting Analysis

Not commonly dusted

Potassium phenoxide is not an ingredient typically 'dusted' in skincare formulations. Its classification as a severely hazardous chemical, known to cause severe skin burns and acute toxicity, strictly precludes its use in any cosmetic or personal care products. Regulatory bodies, such as the Australian inventory, explicitly do not approve its direct use in products.

The Formula

Formulation

Solubility
Water
Optimal pH N/A
0 7 14

Stability

As a hygroscopic compound, potassium phenoxide readily absorbs atmospheric moisture and requires storage under an inert atmosphere at room temperature. Its strong basicity is evident from its typical pH range of 11-12.

Conflicts

  • Acidic compounds
  • Moisture/Water

Safety

Safety Profile

CIR Status
Not reviewed
Sensitization risk High

Potassium phenoxide is classified as highly hazardous, exhibiting acute toxicity upon ingestion, skin contact, or inhalation (GHS Category 3). It causes severe skin burns (Category 1B) and serious eye damage (Category 1). Furthermore, it is suspected of causing genetic defects (Germ Cell Mutagenicity Category 2) and may lead to organ damage from prolonged or repeated exposure (Specific Target Organ Toxicity - Repeated Exposure Category 2). It is also highly toxic to aquatic life with long-lasting environmental effects. Regulatory bodies have not approved its direct use in products.

Your Skin

Skin Compatibility

No Normal
No Dry
No Oily
No Sensitive
Irritancy High
Comedogenicity Unknown

Our Assessment

Verdict

Avoid

Potassium phenoxide must be entirely avoided in skincare formulations due to its extreme corrosivity, severe acute toxicity, and documented potential for genetic and organ damage, rendering it fundamentally unsafe for dermal application.

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