Calcium acetate

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Description

A white powder prepared by treating acetic acid with calcium carbonate or lime. Calcium acetate is a water-soluble compound that has been used for aqueous and nonaqueous neutralization and alkalization of paper (AIC Book and Paper Catalog). However, during the neutralization process, calcium acetate is converted to calcium carbonate with the release of acetic acid. Any residual calcium acetate will continue to release acetic acid. Calcium acetate has also been used to reintroduce calcium ions into weathered glass (Corvaia, et. al 1996). Calcium acetate is used commercially as a mordant in dyeing and printing textiles, for liming rosin, for curing and tanning skins, and as a metallic soap.

Synonyms and Related Terms

calcium diacetate; lime acetate; acetate of lime; vinegar salts; gray acetate; brown acetate

Chemical structure

Calcium acetate.jpg


Other Properties

Rod-shaped crystals. Soluble in water (pH = 7.6 for 0.2M solution). Slightly soluble in methanol. Insoluble in ethanol, acetone, benzene.

Composition C4H6CaO4
CAS 62-54-4
Melting Point > 160
Density about 1.5
Molecular Weight mol. wt. = 158.17

Hazards and Safety

Combustible.

Mallinckrodt Baker: MSDS

Additional Information

C.Corvaia, I.MacLeod, C.Harley "Conservation of Glass Recovered from Shipwreck Sites" ICOM preprints, 1996 Edinburgh, vol.II p.819-825.

Sources Checked for Data in Record

  • Thomas Gregory, The Condensed Chemical Dictionary, Reinhold Publishing, New York, 3rd ed., 1942
  • G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971 Comment: p. 133
  • The Merck Index, Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983 Comment: entry 1683
  • Matt Roberts, Don Etherington, Bookbinding and the Conservation of Books: a Dictionary of Descriptive Terminology, U.S. Government Printing Office, Washington DC, 1982
  • Book and Paper Group, Paper Conservation Catalog, AIC, 1984, 1989