About HOCl

What is HOCl (hypochlorous acid) water?

Aqueous solution that includes hypochlorous acid as a major component generated from hydrochloric acid or saline solution by electrolysis

According to MFDS notification 「Food additives and other disinfectants and sanitizers for tools」

Classification of HOCl water based on
Available Chlorine Concentration (ppm) & Hydrogen Ion Concentration (pH)

Category Preparation Available Chlorine Concentration,
Hydrogen Ion Concentration
Strongly acidic HOCl water Aqueous solution obtained at anode through electrolysis of an aqueous solution of sodium chloride with a concentration of 0.2 % or lower in membrane type electrolytic bath 20 ~ 60 ppm pH 2.7 or less
Weakly acidic HOCl water Aqueous solution obtained at anode through electrolysis of an aqueous solution of sodium chloride solution with a certain concentration, with aqueous solution obtained at cathode added 10 ~ 60 ppm pH 2.7 ~ 5.0
Slightly acidic HOCl water Aqueous solution obtained through electrolysis of hydrochloric acid or an aqueous sodium chloride solution added hydrochloric acid in membrane-free type electrolytic bath 10 ~ 80 ppm pH 5.0 ~ 6.5

[Source] MFDS notification No. 2020-18

Characteristics of HOCl water

  • A colorless liquid
    with odorless
    or
    slight chlorine odor

  • 70~80 times
    stronger sterilizing power

    than NaOCl (In the same
    concentration condition)

  • Substances that are reduced
    to water over time

▪ Sterilization Range: Bacteria, Fungi, Viruses
▪ Applications: Food, Medicine, Agriculture & Livestock, Infectious disease prevention