Sodium Metabisulfite
Buy Sodium Metabisulfite (CAS 7681-57-4) from Zemixal: Na2O5S2, COA and SDS with every lot, worldwide shipping. Packs from 10 mg.
About Sodium Metabisulfite
Zemixal supplies Sodium Metabisulfite within its inorganic Chemicals, Metals & Advanced Materials portfolio. Identity at a glance (Reference Standard): CAS 7681-57-4, formula Na2O5S2 and molar mass 190.11 g/mol.
Where it is used
- Materials research
- Chemical synthesis
Storage and safety notes
Hazard communication follows GHS (Danger: H302 and H318). Our SDS lists exposure controls and first-aid measures.
Order it in 10 mg, 25 mg, 50 mg, 100 mg and 250 mg packs or ask for a bulk quotation. Each lot travels with a batch certificate of analysis and a 16-section SDS. Send an enquiry through the quote panel and you get a formal offer with Incoterms and delivery time.
Specifications and identifiers
| Product name | Sodium Metabisulfite |
|---|---|
| Catalogue number | ZX-013231 |
| CAS number | 7681-57-4 |
| Other CAS numbers | 33669-61-3, 16731-55-8 |
| Molecular formula | Na2O5S2 |
| Molar mass | 190.11 g/mol |
| Exact mass | 189.8983 |
| Grade | Reference Standard |
| H-bond donors / acceptors | 0 / 6 |
| Topological polar surface area | 125 Ų |
| InChIKey | HRZFUMHJMZEROT-UHFFFAOYSA-L |
| SMILES | [O-]S(=O)S(=O)(=O)[O-].[Na+].[Na+] |
| PubChem CID | 656671 |
| Synonyms | Disulfurous acid, disodium salt, Covastyle MBS, Disodium disulfite, Sobisu, Sodium disulfite (Na2S2O5), Sodium metabisulfite (Na2S2O5), Sodium pyrosulfite, Sodium pyrosulfite (Na2S2O5), Sodium sulfur oxide (Na2S2O5), Sodium disulfite, Disodium pyrosulfite, Natrii disulfis |
Lot values are stated on the batch certificate of analysis. Ask for a typical COA with your quotation.
Safety and GHS hazards
Signal word Danger
- H302Harmful if swallowed
- H318Causes serious eye damage
Precautionary statements P264, P264 + P265, P270, P280, P301 + P317, P305 + P354 + P338, P317, P330, P501
Classification summarised from public GHS notifications. It can vary with grade and concentration, so always follow the SDS supplied with your lot.
Pack sizes
| 10 mg | Quoted on request | |
| 25 mg | Quoted on request | |
| 50 mg | Quoted on request | |
| 100 mg | Quoted on request | |
| 250 mg | Quoted on request | |
| 500 mg | Quoted on request | |
| 1 g | Quoted on request |
Need a different size? Bulk drums and custom packing are quoted on request through the quote form on this page.
Questions about Sodium Metabisulfite
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Other grades with CAS 7681-57-4
All 7 grades- CAS
- 7681-57-4
- Formula
- Na2O5S2
- MW
- 190.11 g/mol
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