Selenous acid
| Names | |
|---|---|
| IUPAC name
Selenous acid
| |
| Identifiers | |
3D model (JSmol)
|
|
| ChEBI | |
| ChemSpider | |
| ECHA InfoCard | 100.029.067 |
| KEGG | |
PubChem CID
|
|
| UNII | |
CompTox Dashboard (EPA)
|
|
| |
| Properties | |
| H2SeO3 | |
| Molar mass | 128.97 g/mol |
| Appearance | white hygroscopic crystals |
| Density | 3.0 g/cm3 |
| Melting point | decomposes at 70°C |
| very soluble | |
| Solubility | soluble in ethanol |
| Related compounds | |
| Other anions | selenic acid hydrogen selenide |
| Other cations | sodium selenite |
| Related compounds | sulfurous acid tellurous acid polonous acid |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |
 verify (what is   ?)
| |
| Infobox references | |
Selenous acid, also known as selenious acid, is a chemical compound. Its chemical formula is H2SO3. It is an acid. It contains hydrogen and selenite ions.
Properties
Selenous acid is a weak acid. It can be heated to make selenium dioxide. It is more stable than sulfurous acid. It can be crystallized as a white solid. It is a weak oxidizing agent. It reacts with bases to make selenites.
Preparation
It is made by dissolving selenium dioxide in water.
Uses
It is used in the bluing of steel. It is used in the making of organic compounds.
Safety
Selenous acid is very toxic. Just ingesting a small amount can kill you.
Related pages
Sources
- ↑ Lide, David R. (1998). Handbook of Chemistry and Physics (87 ed.). Boca Raton, FL: CRC Press. pp. 4–81. ISBN 0-8493-0594-2.