CAS 7681-57-4
Sodium Metabisulfite
CAS 7681-57-4Na2O5S2190.11 g/mol
Sodium Metabisulfite is a versatile food-grade compound used primarily as a preservative and antioxidant in various food processing applications. It inhibits microbial growth and browning reactions, ensuring the freshness and quality of food products. Commonly utilized in winemaking, it also finds applications in the textile and pulp industries, as well as water treatment processes. Sourced from trusted manufacturers like KAIHUA, Sodium Metabisulfite is essential for maintaining purity in foods and beverages.
Main applicationFood preservation — prevents microbial growth and oxidation in food products.
Sodium Metabisulfite is crucial for food and beverage industries where preservation and quality are paramount. It effectively prevents spoilage and oxidation, ensuring product freshness. This compound is also significant in water treatment, making it essential for maintaining environmental standards in waste management.
Also known as
- Sodium metabisulfite
- Sodium pyrosulfite
- Sodium disulfite
- Disodium pyrosulfite
- Natrii disulfis
- Campden Tablets
- Disodium metabisulfite
- Natrium pyrosulfit
Trade pricing
Quoted per enquiry
Pricing depends on volume, grade and delivery point. Our desk responds within two working hours.
Available packaging
- Available in 25.0 kg bags for ease of handling and transport.
Documentation
Batch-specific COA issued with every consignment.
Technical specifications
- CAS number
- 7681-57-4
- Chemical formula
- Na2O5S2
- Molecular weight
- 190.11 g/mol
- Grade
- Food grade
- Appearance
- White crystalline powder
- Density
- 1.4 g/cm³
- Density
- 1.4 g/cm³
- Melting Point
- >302 °F
- Solubility
- 54 %
- pH
- 4.0-5.5
Sodium Metabisulfite (Na2O5S2) has a molecular weight of 190.11 g/mol and a density of 1.4 g/cm³ at 25 °C. It is characterized by its powder form and is highly soluble in water (54% at room temperature), making it effective for quick dissolution in applications. The product has a melting point greater than 302 °F and decomposes upon boiling. When purchasing, buyers should specify food-grade quality and inquire about concentrations, ensuring suitability for their specific applications.
Delivery
Sodium Metabisulfite is dispatched from our Nairobi warehouse across Kenya, and export delivery is arranged to the wider East African market. Lead time depends on quantity and grade and is confirmed with your quotation — see delivery and collection for the towns we reach and how dispatch works.
Applications & uses
- Food preservation — prevents microbial growth and oxidation in food products.
- Water treatment — used as a dechlorinating agent in wastewater management.
- Winemaking — maintains wine clarity and stability by inhibiting oxidation.
- Textile processing — aids in bleaching and dyeing processes.
- Pulp and paper industry — prevents discoloration during processing.
Industries we supply this to
Why buy this from Sparks
- Prevents spoilage — extends shelf life of food products.
- Reduces need for artificial preservatives — aligns with natural processing trends.
- Enhances product quality — maintains the aesthetic and sensory aspects of food.
- Promotes safe storage — minimizes the risk of contamination in water treatment.
- Cost-effective solution — high efficiency at low concentrations leads to savings.
Quality assurance
- Batches are checked against the specification values listed above before dispatch.
State what your process, auditor or customs clearance requires when you request a quotation, and it is confirmed with the quote.
Safety, handling & storage
Always consult the full Safety Data Sheet before handling. Personnel must use appropriate PPE and follow local regulations for storage, transport and disposal.
Frequently asked questions
What is the CAS number of Sodium Metabisulfite?
The CAS registry number for Sodium Metabisulfite is 7681-57-4. Its chemical formula is Na2O5S2, with a molecular weight of 190.11 g/mol. Quote this number when requesting a quotation or checking documentation, as it identifies the substance unambiguously regardless of the trade name used.
What are the other names for Sodium Metabisulfite?
Sodium Metabisulfite is also referred to as Sodium metabisulfite, Sodium pyrosulfite, Sodium disulfite, Disodium pyrosulfite, Natrii disulfis and Campden Tablets. These names describe the same substance, so a specification or enquiry written against any of them can be matched to this product.
What grade of Sodium Metabisulfite is supplied?
Sodium Metabisulfite is supplied as Food grade. State the grade your process requires when requesting a quotation — where an alternative grade can be sourced, it is confirmed at quotation stage rather than assumed.
What does Sodium Metabisulfite look like?
Sodium Metabisulfite is described as white crystalline powder. Appearance is a useful first check on receipt of goods, though it does not replace the certificate of analysis for confirming that the material meets specification.
What is Sodium Metabisulfite used for?
Common applications include food preservation — prevents microbial growth and oxidation in food products., water treatment — used as a dechlorinating agent in wastewater management., winemaking — maintains wine clarity and stability by inhibiting oxidation., textile processing — aids in bleaching and dyeing processes. and pulp and paper industry — prevents discoloration during processing.. The suitability of the product for a particular process depends on the grade and specification required, which is worth confirming against your own process conditions.
Which industries use Sodium Metabisulfite?
Sodium Metabisulfite is supplied to the Water Treatment, Food Processing & Beverage, Agriculture & Agrochemicals and Textile & Leather Tanning sectors. These are the industries this product is listed against in our catalogue; if your application falls outside them, we can advise on suitability before you order.
What packaging is Sodium Metabisulfite available in?
Available in 25.0 kg bags for ease of handling and transport. Where a different pack size or bulk delivery is required, it is confirmed at quotation stage against availability rather than listed here as standard.
Related to Sodium Metabisulfite
Where this product sits in the catalogue, and the sectors that use it.
References
Technical information on this page was compiled from the following published sources. Safety and handling data always comes from the supplier’s own safety data sheet.
- 1.PubChem CID 656671pubchem.ncbi.nlm.nih.gov
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