Science
Mechanism of Action
This ingredient operates as a cationic surfactant due to its positive charge, enabling it to bind to the negatively charged surface proteins of skin and hair, thereby providing conditioning benefits. As a surfactant, it effectively reduces surface tension, which is crucial for forming and maintaining stable cosmetic emulsions. It may also offer mild antimicrobial or preservative properties within formulations.
Research
Clinical Evidence
Low confidenceN/A
Transparency
Dusting Analysis
The Formula
Formulation
Stability
This compound demonstrates robust stability across acidic conditions, in hard water, and in the presence of inorganic salts. However, it is susceptible to degradation by strong alkalis, with which it can react to form quaternary ammonium bases, and is incompatible with strong oxidizing agents.
Conflicts
- strong alkalis
- strong oxidizing agents
Safety
Safety Profile
A specific Cosmetic Ingredient Review (CIR) assessment for Stearyl PG-Trimonium Chloride is not available. While related quaternary ammonium compounds like Steartrimonium Chloride have been deemed safe in concentrations up to 0.25% in leave-on applications when formulated to be non-irritating, the high irritancy potential noted for Stearyl PG-Trimonium Chloride warrants careful consideration and patch testing.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Due to a 'not reviewed' CIR status and a noted high irritancy potential, Stearyl PG-Trimonium Chloride is a questionable inclusion for precision skincare formulations, despite its conditioning and surfactant benefits.
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References
Sources