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Moumoujus

POTASSIUM SULFIDE.

Avoid CAS 1312-73-8 / 37248-34-3 / DEPILATORY

Potassium sulfide is a highly alkaline inorganic salt that readily hydrolyzes in water. Its primary action involves the breakdown of keratin, making it effective in depilatory formulations.

Summary

Depilatory Agent Reducing Agent Keratolytic

Science

Mechanism of Action

Upon contact with water, Potassium Sulfide (K2S) undergoes hydrolysis, yielding potassium hydrosulfide (KSH) and potassium hydroxide (KOH), resulting in highly alkaline solutions. This potent alkalinity facilitates the breakdown of keratin proteins, primarily utilized for hair removal, and also acts as a reducing agent.

Research

Clinical Evidence

Low confidence
Effective range N/A
Optimal

N/A

Transparency

Dusting Analysis

Not commonly dusted

The Formula

Formulation

Solubility
Water
Optimal pH N/A
0 7 14

Stability

Aqueous solutions exhibit strong alkalinity (pH above 7). The compound is highly hygroscopic, prone to discoloration, and unstable when exposed to air and light.

Conflicts

  • Water (due to ready reaction)
  • Strong acids (leading to violent reactions and hydrogen sulfide gas release)
  • Strong oxidizing agents
  • Chloroform
  • Nitrogen oxide
  • Air (especially in finely divided form, which may be pyrophoric)

Safety

Safety Profile

CIR Status
Not reviewed
Sensitization risk High

This substance is classified as corrosive, capable of inducing severe skin burns and eye damage. It presents toxicity risks via ingestion and inhalation. Global Harmonized System (GHS) hazard statements include H314 (Causes severe skin burns and eye damage) and H400 (Very toxic to aquatic life). The FDA's general advice against unapproved OTC skin lightening products does not constitute a direct safety assessment for potassium sulfide.

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Avoid

Given its corrosive nature, severe hazard profile, and lack of comprehensive safety review for cosmetic use, Potassium Sulfide is not recommended for skincare formulations.

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