Benzalkonium Chloride (5 mL of approx. 4% aqueous solution) is a fully characterized chemical compound used as a reference standard of API Benzalkonium Chloride. The standard offered is compliant with regulatory guidelines. Benzalkonium Chloride (5 mL of approx. 4% aqueous solution) is used for analytical method development, method validation (AMV), and Quality Controlled (QC) applications during synthesis and formulation stages of drug development and serves as a reference standard for traceability against pharmacopeial standards (USP or EP). Axios Research products are intended for analytical purposes only and are not for human use. CAS - 8001-54-5