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Molecule
Selenous Acid
CAS: 7783-00-8 · H2O3Se
2D Structure
3D Structure
Loading 3D structure...
Basic Information
- CAS Registry Number
- 7783-00-8
- Molecular Formula
- H2O3Se
- Molecular Mass
- 128.97299999999998 g/mol
Identifiers
CAS Registry Number
7783-00-8
SMILES
O=[Se](O)O
InChI Key
MCAHWIHFGHIESP-UHFFFAOYSA-N
InChI
InChI=1S/H2O3Se/c1-4(2)3/h(H2,1,2,3)
Names and Synonyms
- Selenous Acid Synonym
- Selenious acid Synonym
- Selenious acid (H2SeO3) Synonym
- Monohydrated selenium dioxide Synonym
- Micro Se Synonym
- Selenium hydroxide oxide (Se(OH)2O) Synonym
All Properties
Comprehensive physical and chemical properties
| Property | Value | Source |
|---|---|---|
| Name | Selenious acid | CAS Common Chemistry |
| Density | 3.00 g/cm³ | CAS Common Chemistry |
| 3.004 g/cm3 @ 15 °C | CAS Common Chemistry | |
| Wikipedia Url | https://en.wikipedia.org/wiki/Selenous_acid | CAS Common Chemistry |
| Canonical SMILES | O=[Se](O)O | CAS Common Chemistry |
| InChI | InChI=1S/H2O3Se/c1-4(2)3/h(H2,1,2,3) | CAS Common Chemistry |
| InChI Key | InChIKey=MCAHWIHFGHIESP-UHFFFAOYSA-N | CAS Common Chemistry |
| Melting Point | 70 °C (decomp) | CAS Common Chemistry |
| Molecular Mass | 128.97299999999998 g/mol | RDKit |
| 129.916915224 g/mol | RDKit | |
| 128.973 g/mol | RDKit | |
| Heavy Atom Count | 4 | RDKit |
| Hydrogen Bond Acceptors | 1 | RDKit |
| Hydrogen Bond Donors | 2 | RDKit |
| Rotatable Bonds | 0 | RDKit |
| Aromatic Ring Count | 0 | RDKit |
| Topological Polar Surface Area | 57.53 Ų | RDKit |
| LogP | -1.6136000000000001 | RDKit |
| -1.6136 | RDKit | |
| Molar Refractivity | 10.878099999999998 cm³/mol | RDKit |
| Ring Count | 0 | RDKit |
| Formal Charge | 0 | RDKit |
| Fraction Csp3 | 0.0 | RDKit |
| Exact Mass | 128.97 g/mol | CAS Common Chemistry |
Spectral Data
NMR, IR, and Mass spectral data
Predicting NMR spectra...
10 ppm
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3
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1
0 ppm
| Shift (ppm) | Multiplicity | Integration | Assignment |
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200 ppm
180
160
140
120
100
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60
40
20
0 ppm
| Shift (ppm) | DEPT | Assignment |
|---|
Note: These NMR spectra are predicted computationally and may differ from experimental data. Predictions are based on chemical environment analysis.
External Resources
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MW = 128.97 g/mol; density = 3.000 g/mL. Edit any field — others recompute live.
