Sodium chlorite

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White, slightly hygroscopic crystals. Sodium chlorite is a powerful oxidizing agent. A dilute aqueous solution produces chlorous acid which is used as a mild Bleaching agent for textiles. Sodium chlorite is also used for the dilignification of paper pulp.

Chemical structure

Sodium chlorite.jpg


  • Very strong oxidizer.
  • Fire and explosion hazard in contact with organic materials.
  • Highly corrosive to tissues.
  • Causes corrosion and burns.
  • ThermoFisher: SDS

Physical and Chemical Properties

Soluble in water.

Composition NaClO2
CAS 7758-19-2
Melting Point 180-200 C (dec)
Molecular Weight mol. wt. = 90.44

Resources and Citations

  • G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971 Comment: p. 686
  • Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
  • Hermann Kuhn, Conservation and Restoration of Works of Art and Antiquities, Butterworths, London, 1986
  • Matt Roberts, Don Etherington, Bookbinding and the Conservation of Books: a Dictionary of Descriptive Terminology, U.S. Government Printing Office, Washington DC, 1982
  • The Dictionary of Paper, American Paper Institute, New York, Fourth Edition, 1980
  • The Merck Index, Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983 Comment: entry 8793

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