Sodium metabisulfite
CAS 7681-57-4 · Na₂O₅S₂ · MW 190.11 g/mol
About Sodium metabisulfite
Sodium metabisulfite is a chemical compound registered under number CAS 7681-57-4, with the molecular formula Na₂O₅S₂, and a molar mass of 190.11 g/mol.
The molecule contains 9 atoms connected by 6 chemical bonds. The interactive 3D model above lets you view the spatial arrangement of the atoms — you can rotate it with the mouse, zoom with the scroll wheel, and switch between skeletal / Ball & Stick / Space Fill visualization modes.
In terms of physicochemical properties, polar surface area PSA = 125 Ų, 0 donors and 6 hydrogen bond acceptors. These parameters are key when assessing bioavailability and interaction with biomolecules.
Chemical data for this compound comes from PubChem (NIH NLM NCBI), one of the world's largest chemical databases. All information is updated automatically and enriched with GHS hazard statement translations compliant with the CLP Regulation (EC 1272/2008). The widget above may be used for educational, research and commercial purposes.
Physicochemical properties
| Molecular formula | Na₂O₅S₂ |
| Molar mass | 190.11 g/mol |
| IUPAC | — |
| SMILES | [O-]S(=O)S(=O)(=O)[O-].[Na+].[Na+] |
| InChIKey | HRZFUMHJMZEROT-UHFFFAOYSA-L |
| logP (XLogP3) | — |
| PSA | 125 Ų |
| HBD / HBA | 0 / 6 |
| PubChem CID | CID 656671 ↗ |
GHS safety
Signal word: Danger
H302 — Harmful if swallowed
H318 — Causes serious eye damage
EUH031 — Contact with acids liberates toxic gas.
Scientific literature
Brak articles naukowych dla CAS 7681-57-4 w PubMed / OpenAlex / Semantic Scholar.
Synonyms
Data sources
- 📊 PubChem CID 656671 — NIH
- 🔬 NIST WebBook — spectroscopy
- 🌐 Wikidata
- 💊 ChEMBL — bioactivity
Related molecules
📜 License & provenancePREDICTED MODEL · NOT VERIFIEDMolGod_License_1
computed by MolGod Scientific · experimental feature (beta) · may contain errors
ILLUSTRATIVE FRAGMENT ARRANGEMENT — relative positions are not structural data
No source 3-D conformer was available to MolGod for this substance. MolGod Scientific computed this geometry from the structural formula with RDKit 2026.03.6 (ETKDGv3 conformer generation, MMFF94 force-field optimisation; lowest-energy converged conformer of a fixed-seed set). It is not a measured structure, it does not come from PubChem, and it has not been compared with experimental data. It shows one possible conformation.
This substance consists of 3 separate components (for example ions). Each component was computed separately; they are arranged radially around a layout anchor for visualisation only (at least 3.0 Å apart). Their relative positions are not a crystal structure, coordination geometry, ionic contacts or any experimentally determined arrangement.
1 stereo element(s) undefined in the source record (1 stereocentre(s), 0 double-bond E/Z) were assigned arbitrarily; the model shows one stereoisomer only, which may not be the naturally occurring or commercial form.
Methods and references
- RDKit: Open-source cheminformatics, version 2026.03.6. Zenodo. doi:10.5281/zenodo.22140358 (all versions: doi:10.5281/zenodo.591637)
- Riniker S, Landrum GA. Better Informed Distance Geometry: Using What We Know To Improve Conformation Generation. J. Chem. Inf. Model. 2015, 55, 2562-2574. doi:10.1021/acs.jcim.5b00654
- Wang S, Witek J, Landrum GA, Riniker S. Improving Conformer Generation for Small Rings and Macrocycles Based on Distance Geometry and Experimental Torsional-Angle Preferences. J. Chem. Inf. Model. 2020, 60, 2044-2058. doi:10.1021/acs.jcim.0c00025
- Halgren TA. Merck molecular force field. I. Basis, form, scope, parameterization, and performance of MMFF94. J. Comput. Chem. 1996, 17, 490-519. doi:10.1002/(SICI)1096-987X(199604)17:5/6<490::AID-JCC1>3.0.CO;2-P
- Tosco P, Stiefl N, Landrum G. Bringing the MMFF force field to the RDKit: implementation and validation. J. Cheminform. 2014, 6, 37. doi:10.1186/s13321-014-0037-3
- Heller SR, McNaught A, Pletnev I, Stein S, Tchekhovskoi D. InChI, the IUPAC International Chemical Identifier. J. Cheminform. 2015, 7, 23. doi:10.1186/s13321-015-0068-4
- Kim S, Chen J, Cheng T, et al. PubChem 2025 update. Nucleic Acids Res. 2025, 53, D1516-D1525. doi:10.1093/nar/gkae1059 Compound record: https://pubchem.ncbi.nlm.nih.gov/compound/656671
- Bolton EE, Kim S, Bryant SH. PubChem3D: Conformer generation. J. Cheminform. 2011, 3, 4. doi:10.1186/1758-2946-3-4 (cited for contrast: no source 3-D conformer was available to MolGod for this record)
MG-STL-7681-57-4-ENGRAVED · 195,708 △ · 9 MB · SHA-256 a5e59db2dfefdff4
MG-STL-7681-57-4-NORMAL · 3,744 △ · 183 KB · SHA-256 a808937c11f83493
- Model
- sodium metabisulfite ·
7681-57-4 - InChIKey
- HRZFUMHJMZEROT-UHFFFAOYSA-L
- License
- CC BY-SA 4.0 International (source rights undetermined — not yet granted)
- Attribution
- MolGod Scientific — sodium metabisulfite (CAS 7681-57-4)
- License & provenance record
- sodium metabisulfite (CAS 7681-57-4) →
- MolGod molecule record
- sodium metabisulfite →
- Source data
- PubChem CID 656671 ↗
- Model information
- STL generated by MolGod ·
MolGod STL Exporter build 48804cd20b0d· generated 2026-10-14 - SHA-256 (STL)
- a808937c11f83493c73ba10c92d6bfe0aab60f45f01ab7d758d7c7189d11e767
- MD5 (STL)
- 956400c79efc49de41256771d0c05fdd
- Model identifier
- MG-STL-7681-57-4
- Transformation
- MolGod Scientific ball-and-stick mesh
- Changes
- PREDICTED geometry computed by MolGod Scientific (RDKit), NOT verified; rendered as a triangulated mesh.
- Wikimedia Commons
- not published yet
This license applies to the MolGod-created STL mesh, not automatically to third-party source material.