Difference between revisions of "Potassium metabisulfite"
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== Description == | == Description == | ||
| − | White granules or powder with a pungent odor. Potassium metabisulfite is used as a [http://cameo.mfa.org/materials/fullrecord.asp?name=bleaching | + | White granules or powder with a pungent odor. Potassium metabisulfite is used as a [http://cameo.mfa.org/materials/fullrecord.asp?name=bleaching%20agent bleaching agent] for [http://cameo.mfa.org/materials/fullrecord.asp?name=straw straw], [http://cameo.mfa.org/materials/fullrecord.asp?name=wood wood], [http://cameo.mfa.org/materials/fullrecord.asp?name=textile textiles], and [http://cameo.mfa.org/materials/fullrecord.asp?name=paper paper]. It is also used in photographic developing solutions. |
== Synonyms and Related Terms == | == Synonyms and Related Terms == | ||
| Line 37: | Line 37: | ||
== Authority == | == Authority == | ||
| − | * | + | * Matt Roberts, Don Etherington, ''Bookbinding and the Conservation of Books: a Dictionary of Descriptive Terminology'', U.S. Government Printing Office, Washington DC, 1982 |
| − | * | + | * Thomas Gregory, ''The Condensed Chemical Dictionary'', Reinhold Publishing, New York, 3rd ed., 1942 |
| − | * | + | * ''The Merck Index'', Susan Budavari (ed.), Merck Research Labs, Whitehouse Station, NJ, 12th Edition, 1996 Comment: entry 7811 |
[[Category:Materials database]] | [[Category:Materials database]] | ||
Revision as of 07:30, 24 July 2013
Description
White granules or powder with a pungent odor. Potassium metabisulfite is used as a bleaching agent for straw, wood, textiles, and paper. It is also used in photographic developing solutions.
Synonyms and Related Terms
potassium pyrosulfite; dipotassium disulfite
Other Properties
Soluble in water. Insoluble in ethanol. Oxidized in air to form potassium sulfate.
| Composition | K2S2O5 |
|---|---|
| CAS | 16731-55-8 |
| Melting Point | 150-190 (dec) |
| Density | 2.3 |
| Molecular Weight | mol. wt. = 222.3 |
Hazards and Safety
International Chemical Safety Card
Authority
- Matt Roberts, Don Etherington, Bookbinding and the Conservation of Books: a Dictionary of Descriptive Terminology, U.S. Government Printing Office, Washington DC, 1982
- Thomas Gregory, The Condensed Chemical Dictionary, Reinhold Publishing, New York, 3rd ed., 1942
- The Merck Index, Susan Budavari (ed.), Merck Research Labs, Whitehouse Station, NJ, 12th Edition, 1996 Comment: entry 7811