Sodium Metabisulfite is a white to off-white crystalline powder with a characteristic sulfur dioxide-like odour. It is also known as sodium pyrosulfite and is valued for its reducing and antioxidant properties.
This ingredient is used in a variety of applications, including industrial processing, water treatment, laboratory work, and selected manufacturing processes. It can help limit oxidation in compatible systems and is used in specific processes requiring a reducing agent.
For cosmetic, personal care, food-related, or other regulated applications, only use a grade specifically approved for the intended purpose and comply with relevant regulations. Always check the supplier’s technical data sheet (TDS), safety data sheet (SDS), and product specifications before use.
Key Features
- Versatile reducing agent for suitable chemical processes
- Antioxidant properties in compatible formulations
- Helps control oxidation in selected applications
- White to off-white crystalline powder, depending on grade
- Suitable for various industrial and laboratory uses
- Water-soluble chemical compound
- Available in grades determined by supplier specifications
Applications
- Industrial chemical processing
- Selected water-treatment applications
- Laboratory and research applications
- Chemical manufacturing processes
- Pulp and paper processing, where applicable
- Other approved applications requiring reducing or antioxidant properties
Product Specifications
Product Name: Sodium Metabisulfite
Chemical Name: Sodium Metabisulfite
Alternative Name: Sodium Pyrosulfite
Chemical Formula: Na₂S₂O₅
CAS Number: 7681-57-4
Molecular Weight: 190.10 g/mol
Appearance: Typically white to off-white crystalline powder
Solubility: Soluble in water
Product Grade: Confirm with supplier
Purity: As specified in the supplier’s certificate of analysis (COA)
Packaging: As available from the supplier
Storage: Keep tightly closed in a cool, dry, well-ventilated place.
Handling and Safety
- Use appropriate protective gloves, eye protection, and suitable workplace ventilation.
- Avoid inhaling dust and prevent contact with eyes and skin.
- Sodium Metabisulfite can release sulfur dioxide when exposed to acids or under certain conditions. Keep away from acids and incompatible materials.
- Individuals sensitive to sulfites may experience adverse reactions.
- Consult the product SDS before handling, storing, or using the material.
- Do not use in food, cosmetics, personal care products, or other regulated applications unless the supplied grade is specifically suitable and legally permitted for that purpose.
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