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Molecule
Sodium Metabisulfite
CAS: 7681-57-4 · H2Na2O5S2
2D Structure
3D Structure
Loading 3D structure...
Basic Information
- CAS Registry Number
- 7681-57-4
- Molecular Formula
- H2Na2O5S2
- Molecular Mass
- 192.13 g/mol
Identifiers
CAS Registry Number
7681-57-4
SMILES
O=S(O)S(=O)(=O)O.[Na].[Na]
InChI Key
ZBVPOSMABOMSMZ-UHFFFAOYSA-N
InChI
InChI=1S/2Na.H2O5S2/c;;1-6(2)7(3,4)5/h;;(H,1,2)(H,3,4,5)
Names and Synonyms
- Sodium Metabisulfite Synonym
- Sobisu Synonym
- Disulfurous acid, sodium salt (1:2) Synonym
- Pyrosulfurous acid, disodium salt Synonym
- Disulfurous acid, disodium salt Synonym
- Sodium pyrosulfite (Na2S2O5) Synonym
- Sodium pyrosulfite Synonym
- Sodium metabisulfite Synonym
- Sodium metabisulfite (Na2S2O5) Synonym
- Disodium pyrosulfite Synonym
- Fertisilo Synonym
- Disodium disulfite Synonym
- Sodium disulfite (Na2S2O5) Synonym
- Disodium metabisulfite Synonym
- Disodium pyrosulfite (Na2S2O5) Synonym
- Campden Tablets Synonym
- Colorstrip Catalyst 100 Synonym
- E 223 Synonym
- Sobis Synonym
- Sodium sulfur oxide (Na2S2O5) Synonym
- NSC 158277 Synonym
- NSC 227243 Synonym
All Properties
Comprehensive physical and chemical properties
| Property | Value | Source |
|---|---|---|
| Molecular Mass | 192.13 g/mol | CAS Common Chemistry |
| 192.125 g/mol | RDKit | |
| 194.127 g/mol | chempirical lib | |
| Density | 1.40 g/cm³ | CAS Common Chemistry |
| 1.4 g/cm3 | CAS Common Chemistry | |
| Wikipedia Url | https://en.wikipedia.org/wiki/Sodium_metabisulfite | CAS Common Chemistry |
| Canonical SMILES | [Na].O=S(O)S(=O)(=O)O | CAS Common Chemistry |
| InChI | InChI=1S/2Na.H2O5S2/c;;1-6(2)7(3,4)5/h;;(H,1,2)(H,3,4,5) | CAS Common Chemistry |
| InChI Key | InChIKey=ZBVPOSMABOMSMZ-UHFFFAOYSA-N | CAS Common Chemistry |
| Melting Point | 150 °C (decomp) | CAS Common Chemistry |
| Name | Sodium pyrosulfite | CAS Common Chemistry |
| Sodium metabisulfite | CAS Common Chemistry | |
| Heavy Atom Count | 9 | RDKit |
| Hydrogen Bond Acceptors | 3 | RDKit |
| Hydrogen Bond Donors | 2 | RDKit |
| Rotatable Bonds | 1 | RDKit |
| Aromatic Ring Count | 0 | RDKit |
| Topological Polar Surface Area | 91.67 Ų | RDKit |
| LogP | -1.7506999999999997 | RDKit |
| -1.7507 | RDKit | |
| Molar Refractivity | 33.827799999999996 cm³/mol | RDKit |
| Ring Count | 0 | RDKit |
| Formal Charge | 0 | RDKit |
| Fraction Csp3 | 0.0 | RDKit |
| Exact Mass | 191.913903724 g/mol | RDKit |
Spectral Data
NMR, IR, and Mass spectral data
Predicting NMR spectra...
10 ppm
9
8
7
6
5
4
3
2
1
0 ppm
| Shift (ppm) | Multiplicity | Integration | Assignment |
|---|
200 ppm
180
160
140
120
100
80
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 = 192.13 g/mol; density = 1.400 g/mL. Edit any field — others recompute live.
