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 == | ||
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[[[SliderGallery rightalign|potassium metabisulfite.jpg~Chemical structure]]] | [[[SliderGallery rightalign|potassium metabisulfite.jpg~Chemical structure]]] | ||
| + | ==Risks== | ||
| + | * ThermoFisher: [https://www.fishersci.com/store/msds?partNumber=P197500&productDescription=POTASSIUM+M+BISULFITE+CRT+500G&vendorId=VN00033897&countryCode=US&language=en SDS] | ||
| + | ==Physical and Chemical Properties== | ||
| − | + | * Soluble in water. Insoluble in ethanol. | |
| − | + | * Oxidized in air to form potassium sulfate. | |
| − | Soluble in water. Insoluble in ethanol. Oxidized in air to form potassium sulfate. | ||
{| class="wikitable" | {| class="wikitable" | ||
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|- | |- | ||
! scope="row"| Melting Point | ! scope="row"| Melting Point | ||
| − | | 150-190 (dec) | + | | 150-190 C (dec) |
|- | |- | ||
! scope="row"| Density | ! scope="row"| Density | ||
| − | | 2.3 | + | | 2.3 g/ml |
|- | |- | ||
! scope="row"| Molecular Weight | ! scope="row"| Molecular Weight | ||
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|} | |} | ||
| − | == | + | ==Resources and Citations== |
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* Matt Roberts, Don Etherington, ''Bookbinding and the Conservation of Books: a Dictionary of Descriptive Terminology'', U.S. Government Printing Office, Washington DC, 1982 | * Matt Roberts, Don Etherington, ''Bookbinding and the Conservation of Books: a Dictionary of Descriptive Terminology'', U.S. Government Printing Office, Washington DC, 1982 | ||
Latest revision as of 10:21, 25 August 2022
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
Risks
- ThermoFisher: SDS
Physical and Chemical Properties
- Soluble in water. Insoluble in ethanol.
- Oxidized in air to form potassium sulfate.
| Composition | K2S2O5 |
|---|---|
| CAS | 16731-55-8 |
| Melting Point | 150-190 C (dec) |
| Density | 2.3 g/ml |
| Molecular Weight | mol. wt. = 222.3 |
Resources and Citations
- 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