D.C. They discovered for the first time that dilute solutions of hypochlorous acid, or free chlorine, as low as 200 -- or even 20 -- milligrams per liter will completely inactivate noroviruses on ...

When chlorine — sold as a granular powder, liquid or sometimes in its elemental form as a gas — is added to water, it forms a weak acid called hypochlorous acid. This acid is very proficient ...

D.C. They discovered for the first time that dilute solutions of hypochlorous acid, or free chlorine, as low as 200 -- or even 20 -- milligrams per liter will completely inactivate noroviruses on ...