Calcium sulfite

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White powder. Calcium sulfite is used for bleaching paper pulp and textiles. It is also used as an antichlor, disinfectant, and food preservative.

Other Properties

Soluble in acids with the evolution of sulfur dioxide. Slightly soluble in water, ethanol.

Composition CaSO3-2H2O
Melting Point 100
Molecular Weight mol. wt. = 120.14
Refractive Index 1.590, 1.595, 1.628

Sources Checked for Data in Record

  • G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971 Comment: p. 132
  • Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
  • Van Nostrand's Scientific Encyclopedia, Douglas M. Considine (ed.), Van Nostrand Reinhold, New York, 1976
  • The Merck Index, Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983 Comment: entry 1755
  • CRC Handbook of Chemistry and Physics, Robert Weast (ed.), CRC Press, Boca Raton, Florida, v. 61, 1980 Comment: ref. index=1.545, 1.560, 1.605