Sulfurous acid
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Description
An unstable acid formed when sulfur dioxide dissolves in water. Sulfurous acid is a strong oxidizing agent and is used to bleach straw and textiles. It is also used in paper pulp manufacturing. Other applications include disinfectant and preservative for fruits, nuts, wine, and other food.
Risks
- Toxic by ingestion and inhalation.
- Corrosive to skin.
- Causes severe burns.
- Fisher Scientific: MSDS
Physical and Chemical Properties
- Soluble in water.
- pH of 0.1N solution=1.5
| Composition | H2SO3 (theoretical) |
|---|---|
| CAS | 7782-99-2 |
| Density | 1.03 g/ml |
| Molecular Weight | 82.07 |
Resources and Citations
- Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
- Matt Roberts, Don Etherington, Bookbinding and the Conservation of Books: a Dictionary of Descriptive Terminology, U.S. Government Printing Office, Washington DC, 1982
- CRC Handbook of Chemistry and Physics, Robert Weast (ed.), CRC Press, Boca Raton, Florida, v. 61, 1980 Comment: pH of 0.1N solution=1.5