The Beauty Signal
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The ingredient narratives reshaping clean beauty.

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Behentrimonium Chloride

aka docosyltrimethylammonium chloride · BTMAC · BAC-22

Cationic conditioning agent in prestige haircare including clean-positioned purple shampoos. Gentler profile versus older quats makes it compatible with clean-beauty ingredient frameworks.

Benefits
  • Deposits on hair surface reducing friction
  • Antistatic conditioning
  • Emollient film on hair cuticle
  • Mild preservative contribution
  • Lower irritation potential than dicetyldimonium chloride
Example uses
  • Purple shampoos
  • Conditioning hair masks
  • Scalp treatments
  • Bond-repairing rinse-outs
  • Leave-in conditioners
Formulation notes

Cationic — incompatible with anionic surfactants in same phase. pH 4–6 for optimal deposition.

Watchouts

Synthetic quaternary ammonium compound — flagged in some strict clean-beauty frameworks. Aquatic toxicity at higher concentrations documented.

Clean beauty perception

Accepted by most clean-beauty standards. Excluded from some quat-free formulations. Rapeseed-derived framing does not fully disclose industrial quaternisation.