Related Experiment Video
Updated: May 18, 2026

The Portable Chemical Sterilizer (PCS), D-FENS, and D-FEND ALL: Novel Chlorine Dioxide Decontamination Technologies for the Military
Published on: June 29, 2014
Microbicidal effect of weak acid hypochlorous solution on various microorganisms
Tomoko Ono1, Koji Yamashita, Tomomi Murayama
1Research and Technology Development Division, HSP company, 56-5 Ezaki, Okayama-shi, Okayama 702-8005, Japan. ono@hsp-net.co.jp
Abstract:
We investigated the microbicidal effect of weak acid hypochlorous solutions of pH 5.0 - 6.0, produced by mixing NaClO and HCl in water, against various bacteria, fungi, and virus in vitro. The weak acid hypochlorous solution had excellent microbicidal effect against a broad microbicidal spectrum of standard strains and clinical isolates in a short time. The microbicidal effects of hypochlorous solutions did not depend on the available chlorine concentration but on the HClO concentration. These results show that the weak acid hypochlorous solution has practical applicability in such places as hospitals and establishments related to the food industry.
Related Concept Videos
Chemical Agents for Microbial Control
Antimicrobial Effectiveness
Weak Acid Solutions
Hand hygiene
Hand washing...
Mixtures of Acids
A Mixture of a Strong Acid and a Weak Acid
In a mixture of a strong acid and a weak acid, the strong acid dissociates completely and becomes a source of almost all the hydronium ions...
Mixtures of Acids
In a strong and weak acid mixture, the strong acid dissociates completely and becomes a source of almost all the hydronium ions present in the solution. In contrast, the weak acid shows...
