<p><strong>Noun</strong></p><ul><li>A halogen element, a heavy, greenish-yellow, incombustible, water-soluble, poisonous gas that is highly irritating to the respiratory organs, obtained chiefly by electrolysis of sodium chloride brine.</li><li>Used for water purification, in the making of bleaching powder, and in the manufacture of chemicals that do not contain chlorine, as ethylene glycol, and of those that do.</li><li>Chemical symbol: Cl</li><li>Atomic weight: 35.453</li></ul>