Definition of hypochlorous acid in English:

hypochlorous acid

Pronunciation /ˌhīpəˌklôrəs ˈasəd/ /ˌhaɪpəˌklɔrəs ˈæsəd/


  • A weak acid with oxidizing properties formed when chlorine dissolves in cold water and used in bleaching and water treatment.

    Chemical formula: HOCl

    ‘It has been demonstrated, for example, that NAC has the ability to scavenge hydrogen peroxide, hypochlorous acid and the hydroxyl radical.’
    • ‘In mammalian neutrophils, myeloperoxidase is a key player, converting hydrogen peroxide to hypochlorous acid.’
    • ‘This effect would be exacerbated if hypochlorous acid inactivates proteinase inhibitor by oxidizing its critical methionine residue.’
    • ‘Research has demonstrated that taurine reacts with and neutralizes hypochlorous acid.’
    • ‘As a direct free radical scavenger, NAC reduces hypochlorous acid produced by neutrophils in order to kill target cells.’


Mid 19th century hypochlorous from hypo-(denoting an element in a low valency) + chlorine+ -ous.