Quick facts
What it is. HOCl is the formula for hypochlorous acid, a weak acid that forms when chlorine dissolves in water. (source)
Your body makes it. White blood cells called neutrophils make HOCl with the enzyme myeloperoxidase. (source)
A stronger oxidant than bleach's main form. Hypochlorous acid is a much stronger oxidant than hypochlorite, the main form of chlorine in household bleach.
pH decides the form. Below about pH 7.5, most free chlorine is HOCl. Above it, most is hypochlorite. (source)
Made from salt and water. A hypochlorous acid generator runs an electric current through salt water to make HOCl solution where you'll use it. How it works →
Make it fresh. HOCl loses strength over time. Manufacturer-stated storage for the Eco One: keeps close to 90% of its strength for about 90 days in a closed, light-protected container at room temperature or cooler. (source)
Pick by batch size. For home, the Eco One makes 1 L. For business, the Hypo 7.5 makes 7.5 L at 200 or 500 ppm, and the EWCO 300 makes a continuous flow at 20–300 ppm. Check each model's manual before you choose.
HOCl solutions have different intended uses. Review model documentation before selecting equipment.
