Differences in antibacterial activity of benzalkonium chloride
Related Experiment Video
Updated: Sep 22, 2026

Generation of Greater Bacterial Biofilm Biomass using PCR-Plate Deep Well Microplate Devices
Published on: April 22, 2022
Abstract:
Benzalkonium solutions obtained from different manufacturers were shown to have different activities. This difference in activity was related to the composition of the benzalkonium chloride. The potential seriousness of this situation is emphasized, and a recommendation is made that the official monographs on benzalkonium chloride be amended appropriately, noting the apparently superior antibacterial activity of the tetradecyl (C14) homolog.
Related Concept Videos
Acid/Base Strengths and Dissociation Constants
Acid and Bases: Ka, pKa, and Relative Strengths
Electrophilic Aromatic Substitution: Chlorination and Bromination of Benzene
Pharmaceutical Alternatives: Stability-Related Therapeutic Nonequivalence
Antimicrobial Effectiveness
Inhibitors of Gram-positive Cell Wall Synthesis

