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Article | REF: W2701 V1

Oxidation and reduction applied to water treatment - Oxygen, chlorine and derivatives

Authors: Sylvie BAIG, Pierre MOUCHET

Publication date: August 10, 2008 | Lire en français

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    4. Chlorine dioxide

    4.1 Physico-chemical properties

    Also known as chlorine dioxide or chlorine peroxide, chlorine dioxide is a chlorine compound in the +4 oxidation state, making it a highly oxidizing agent with high disinfecting, bleaching and deodorizing power.

    Its formula is ClO 2 and its properties are summarized in Box 3. It is an unstable gas with a yellow-orange color and a pungent odor. Pure, it explodes by releasing chlorine under the effect of heat and/or light, or on contact with organic matter or other reducing substances: sulfur and its derivatives, powdered metals, phosphorus, carbon monoxide, hydrocarbons... Mixed with air, it becomes explosive when its concentration exceeds 10% by volume.

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