Used primarily as a biocide and antiseptic in cosmetic and personal care formulations. It is effective in controlling microbial growth in products such as creams, lotions, and hair conditioners. Its cationic nature allows it to bind well to skin and hair surfaces, providing long-lasting antimicrobial protection without causing irritation at low concentrations. Also employed as a preservative in ophthalmic and topical pharmaceutical preparations due to its stability and efficacy against a broad spectrum of microorganisms.