Cuprous sulfite

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White, crystalline powder. Cuprous sulfite is used as a biocide and as a mordant for dyeing acrylic fibers.

Synonyms and Related Terms

copper sulfite; Etard's salt (hemihydrate); Chevreul's salt (dihydrate)

Physical and Chemical Properties

Soluble in ammonium hydroxide, hydrochloric acid. Insoluble in ethanol, ether and cold water. Hexagonal crystals.

Composition Cu2SO3-H2O
Density 3.83 g/ml
Molecular Weight mol. wt. = 207.16

Resources and Citations

  • Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
  • Susan E. Schur, Conservation Terminology: A review of Past & Current Nomenclature of Materials, Technology and Conservation, Spring (p.34-39); Summer (p.35-38); Fall (p.25-36), 1985
  • The Merck Index, Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983 Comment: entry 2738