Difference between revisions of "Phosphorus acid"
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orthophosphorous acid; phosphonic acid; phosphorous phlogisticated | orthophosphorous acid; phosphonic acid; phosphorous phlogisticated | ||
| + | [[[SliderGallery rightalign|phosphorous acid.jpg~Chemical structure]]] | ||
| − | [ | + | == Risks == |
| + | |||
| + | * Corrosive on contact. Causes burns. | ||
| + | * Fisher Scientific: [https://fscimage.fishersci.com/msds/21882.htm MSDS] | ||
| − | == | + | == Physical and Chemical Properties == |
Soluble in water, ethanol. | Soluble in water, ethanol. | ||
| Line 22: | Line 26: | ||
|- | |- | ||
! scope="row"| Melting Point | ! scope="row"| Melting Point | ||
| − | | 73 | + | | 73 C |
|- | |- | ||
! scope="row"| Density | ! scope="row"| Density | ||
| − | | 1.65 | + | | 1.65 g/ml |
|- | |- | ||
! scope="row"| Molecular Weight | ! scope="row"| Molecular Weight | ||
| Line 31: | Line 35: | ||
|- | |- | ||
! scope="row"| Boiling Point | ! scope="row"| Boiling Point | ||
| − | | 200 (dec) | + | | 200 C (dec) |
|} | |} | ||
| − | == | + | ==Resources and Citations== |
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| − | |||
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* Richard S. Lewis, ''Hawley's Condensed Chemical Dictionary'', Van Nostrand Reinhold, New York, 10th ed., 1993 | * Richard S. Lewis, ''Hawley's Condensed Chemical Dictionary'', Van Nostrand Reinhold, New York, 10th ed., 1993 | ||
Latest revision as of 08:54, 22 October 2022
Description
White hygroscopic crystals that is usually marketed as a 20% aqueous solution. Phosphorus acid is a good reducing agent and a stronger acid than phosphoric acid. Phosphorous acid is primarily used as a reagent and to make phosphate salts.
Synonyms and Related Terms
orthophosphorous acid; phosphonic acid; phosphorous phlogisticated
Risks
- Corrosive on contact. Causes burns.
- Fisher Scientific: MSDS
Physical and Chemical Properties
Soluble in water, ethanol.
| Composition | H3PO3 |
|---|---|
| CAS | 13598-36-2 |
| Melting Point | 73 C |
| Density | 1.65 g/ml |
| Molecular Weight | mol. wt. = 82.0 |
| Boiling Point | 200 C (dec) |
Resources and Citations
- Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
- The Merck Index, Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983 Comment: entry 7502
- 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