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 [ | + | White granules or powder with a pungent odor. Potassium metabisulfite is used as a [[bleaching%20agent|bleaching agent]] for [[straw|straw]], [[wood|wood]], [[textile|textiles]], and [[paper|paper]]. It is also used in photographic developing solutions. |
== Synonyms and Related Terms == | == Synonyms and Related Terms == | ||
Revision as of 11:31, 10 May 2016
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
Sources Checked for Data in Record
- 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