Sodium metabisulfite
Sodium metabisulfite (CAS: 7681-57-4, Na2S2O5) is a versatile inorganic compound with a molecular weight of 190.11 g/mol. It presents as a white crystalline powder. This reagent is primarily utilised in chemical synthesis and as a reducing agent. Tech Serve Solutions supplies this compound in JIS first grade, suitable for various industrial and laboratory applications where high purity is required.
- IUPAC
- Sodium disulfite,Sodium pyrosulfite
- Synonyms
- Sodium disulfiteSodium pyrosulfite
Chemical Synthesis
Sodium metabisulfite serves as a crucial reagent in numerous organic synthesis pathways. Its reducing properties are valuable for specific chemical transformations.
Reducing Agent
The compound acts as a powerful reducing agent in various industrial processes. It is effective in reducing oxidizing agents and in applications requiring a source of sulfur dioxide.
Laboratory Reagent
As a readily available inorganic salt, it is employed in laboratory settings for analytical procedures and experimental chemistry. Its defined purity makes it suitable for research purposes.
| Molecular weight | 190.11 |
|---|---|
| Linear formula | Na2S2O5 |
| Assay | ≥97.0% |
| Grade | JIS first grade |
| Impurities tested | ≤0.005% insolubles |
| Melting point | >300 °C(lit.) |
Hazard statements
- H302Harmful if swallowed
- H318Causes serious eye damage
Precautionary statements
- P280Wear protective gloves, clothing and eye/face protection
- P305IF IN EYES
| Protective equipment | dust mask type N95 (US), Eyeshields, Gloves |
|---|---|
| Water hazard class (WGK, DE) | 1 |
| Hazard codes (EU) | Xn |
| Risk statements (R) | 22-31-41 |
| Safety statements (S) | 26-39-46 |
| Supplemental hazards | Contact with acids liberates toxic gas. |
| Cation traces | Fe: ≤0.002%heavy metals (as Pb): ≤0.001% |
| Anion traces | chloride (Cl-): ≤0.05%thiosulfate (S2O32-): ≤0.05% |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
| Availability | available only in Japan |
|---|
Documentation
Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is Sodium Metabisulfite used for?
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Sodium metabisulfite (CAS: 7681-57-4) is used in chemical synthesis and as a reducing agent in various industrial and laboratory applications.
What is the CAS number and formula for Sodium Metabisulfite?
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The CAS number is 7681-57-4 and the chemical formula is Na2S2O5.
What grade and purity does Tech Serve Solutions supply for Sodium Metabisulfite?
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Tech Serve Solutions supplies Sodium Metabisulfite in JIS first grade with an assay of ≥97.0% and ≤0.005% insolubles. We do not represent this product as USP, BP, or EP grade.
How should Sodium Metabisulfite be handled safely?
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Sodium metabisulfite is a Danger hazard. It causes serious eye damage and is harmful if swallowed. Contact with acids liberates toxic gas. Wear Eyeshields, Gloves, and a dust mask type N95 (US). In case of contact with eyes, rinse cautiously with water for several minutes and seek medical advice.
Is Sodium Metabisulfite available for export?
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Currently, Sodium Metabisulfite is available only within Japan.
How can I request a quote or sample for Sodium Metabisulfite?
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To request a quote or sample for Sodium Metabisulfite, please contact our sales team through the website or provide your details on the product page.
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