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Chemical Industry Tips – Chlorites

2018-09-13View Original

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Salts of chlorous acid, such as sodium chlorite and potassium chlorite. Sodium chlorite can be produced by reacting chlorine dioxide with sodium peroxide: Na2O2 + 2ClO2 → 2NaClO2 + O2. By adding dilute sulfuric acid to a suspension of barium chlorite and removing the barium sulfate precipitate, a dilute solution of chlorous acid is obtained. Chlorous acid is extremely unstable and decomposes rapidly. Chlorites are more stable than hypochlorous acid; alkaline solutions of chlorites do not decompose even after being stored for a year. When solid chlorites are heated or impacted, they explode immediately, disproportionating into chlorates and chlorides; for example, 3NaClO2 → 2NaClO3 + NaCl. Chlorites possess oxidizing properties and can be used as bleaching agents.

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