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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
Names and Synonyms:
Sodium Metabisulfite
Sobisu
Disulfurous acid, sodium salt (1:2)
Pyrosulfurous acid, disodium salt
Disulfurous acid, disodium salt
Sodium pyrosulfite (Na2S2O5)
Sodium pyrosulfite
Sodium metabisulfite
Sodium metabisulfite (Na2S2O5)
Disodium pyrosulfite
Fertisilo
Disodium disulfite
Sodium disulfite (Na2S2O5)
Disodium metabisulfite
Disodium pyrosulfite (Na2S2O5)
Campden Tablets
Colorstrip Catalyst 100
E 223
Sobis
Sodium sulfur oxide (Na2S2O5)
NSC 158277
NSC 227243
Identifiers:
SMILES:
O=S(O)S(=O)(=O)O.[Na].[Na]
InChI:
InChI=1S/2Na.H2O5S2/c;;1-6(2)7(3,4)5/h;;(H,1,2)(H,3,4,5)
Key Properties
Melting Point
150 °C (decomp)
CAS Common Chemistry
Density
1.40 g/cm³
CAS Common Chemistry
Spectral Data
NMR, IR, and Mass spectral data
1H NMR
13C NMR
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.
All Properties
Comprehensive physical and chemical properties
| Property | Value | Source |
|---|---|---|
| Molecular Mass | 192.13 g/mol | CAS Common Chemistry |
| 192.125 g/mol | RDKit | |
| 191.913903724 g/mol | RDKit | |
| 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 |
| Molar Refractivity | 33.827799999999996 | RDKit |
