Selenous acid
Selenous acid (or selenious acid) is the chemical compound with the formula H2SeO3. Structurally, it is more accurately described by O=Se(OH)2. It is the principal oxoacid of selenium; the other being selenic acid.
| Names | |
|---|---|
| IUPAC names
Selenous acid Selenic(IV) acid | |
| Other names
Selenious acid | |
| Identifiers | |
3D model (JSmol) |
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| ChEBI | |
| ChEMBL | |
| ChemSpider | |
| DrugBank | |
| ECHA InfoCard | 100.029.067 |
| EC Number |
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| KEGG | |
PubChem CID |
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| RTECS number |
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| UNII | |
| UN number | 3283 2630 |
CompTox Dashboard (EPA) |
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| Properties | |
| H2SeO3 | |
| Molar mass | 128.984 g·mol−1 |
| Appearance | white hygroscopic crystals |
| Density | 3.0 g/cm3 |
| Melting point | decomposes at 70 °C |
| very soluble | |
| Solubility | soluble in ethanol |
| Acidity (pKa) | pKa1 = 2.46 pKa2 = 7.3 |
| Conjugate base | Hydrogenselenite |
| −45.4·10−6 cm3/mol | |
| Pharmacology | |
| Intravenous infusion | |
| Legal status |
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| Hazards | |
| GHS labelling: | |
| Danger | |
| H301, H331, H373, H410 | |
| P260, P261, P264, P270, P271, P273, P301+P310, P304+P340, P311, P314, P321, P330, P391, P403+P233, P405, P501 | |
| Related compounds | |
Other anions |
Selenic acid Hydrogen selenide |
Other cations |
Sodium selenite |
Related compounds |
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Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references | |
| Clinical data | |
|---|---|
| AHFS/Drugs.com | Monograph |
| License data | |
| Identifiers | |
| DrugBank | |
| CompTox Dashboard (EPA) | |
| ECHA InfoCard | 100.029.067 |
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