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STEAROYL PG-TRIMONIUM CHLORIDE
Safety score · 0–100
Fine
Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.
Stearoyl Pg-Trimonium Chloride is a cosmetic ingredient used in product formulations. Its specific function may vary between products. Exercise caution due to limited available safety data.
A monoquaternary ammonium salt with a stearoyl (C18:0) chain attached via an ester linkage to a propyleneglycol-modified quaternary ammonium group. The long saturated hydrocarbon chain provides high substantivity and strong hydrophobic coating on hair and skin. The ester bond offers some biodegradability advantage over fully non-ester quats. No EU Annex II or III restrictions specifically target this compound class. Safe for use in rinse-off and leave-on cosmetic formulations at recommended concentrations.
Skin benefits
- Strong hydrophobic coating - conditions and protects hair
- Reduces frizz and enhances smoothness
- Improves tensile strength of damaged hair
Known concerns
- Mild skin and eye irritant at high concentrations
- Generally safe at typical use levels in finished products
References
EU CosIng database
European Commission cosmetic ingredient registry: regulatory status, restrictions, authorised functions.
Related others
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This profile is for educational purposes and does not constitute medical advice. Regulatory status and scientific understanding evolve, so always read the physical product label and consult a healthcare professional for personal concerns.