Hypochlorous acid

Hypochlorous acid (HOCl) is a weak acid that forms when chlorine dissolves in water, and itself partially dissociates, forming hypochlorite, ClO−. HOCl is a powerful oxidizer.

Chemistry

Hypochlorous acid is a weak acid that can only exist in solution, as it is highly unstable when isolated in a pure form. In aqueous solution, hypochlorous acid partially dissociates into the anion hypochlorite ClO−.

Production

Hypochlorous acid is produced by the human immune system to kill invasive microorganisms. In industry, hypochlorous acid is produced by the reaction of chlorine gas with water, or by electrolysis of salt water.

Uses

Hypochlorous acid is used for sanitation of swimming pools and cooling towers, as well as disinfecting drinking water. It is also used in wound healing and eye care products.

Safety

Hypochlorous acid, like all chlorine-based bleaches, is a strong oxidizer. Contact with skin can cause irritation and burns. Inhalation can cause respiratory distress.

See also

• Chlorine
• Hypochlorite
• Disinfection
• Oxidizing agent

Hypochlorous acid Resources
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