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Sodium Metabisulphate

Sodium Metabisulphate

CAS Number: 7681-57-4

Molecular Formula: Na2S2O5

About Sodium Metabisulphate

Sodium Metabisulphite (CAS 7681-57-4) is a critical antioxidant and preservative in the U.S. food and beverage sector, where maintaining 98% food-grade purity is essential for preventing melanosis in shellfish and enzymatic browning in fresh-cut produce. Disodium pyrosulfite serves as a high-performance dechlorination ...

Sodium Metabisulphate Specifications

CAS Number
7681-57-4
Molecular Formula
Na2S2O5
Molecular Weight
190.11 g/mol
IUPAC Name
sodium metabisulfite
Canonical SMILES
[O-]S(=O)(=O)S(=O)(=O)[O-].[Na+].[Na+]
InChI Key
HRZFUMHJMZEROT-UHFFFAOYSA-L
Molecular Weight
190.11 g/mol

Food Preservative

A versatile additive used to inhibit microbial growth and prevent enzymatic browning in processed foods, dried fruits, and seafood

Antioxidant and Excipient

A stabilizer used in pharmaceutical formulations and injectable medications to prevent the oxidation of active ingredients like adrenaline

Dechlorination Agent

A reducing agent employed in water treatment to neutralize residual chlorine and protect aquatic life or sensitive downstream equipment

Bleaching and Reducing Agent

A chemical used in the textile and paper industries for bleaching fibers and as an antichlor after chlorine treatments

Photographic Chemical

A key component in developing solutions and fixing baths used to stabilize images and prevent oxidation

Gold Mining Reagent

A source of sulfur dioxide used for the destruction of cyanide and the precipitation of elemental gold in commercial mining processes.

Sodium Metabisulphate FAQs

Minimum Order Quantity

25 kg (evaluation) · 1 MT (commercial)

Lead Time

3 – 5 weeks estimated

Delivery Terms

FOB*

Packaging

20 L pails, 200 L HDPE drums, 1000 L IBC

US Availability

US Facility Inventory

Documentation

US SDS · COA · TDS · Specification sheet

US Regulatory & Quality Information

TSCA status*

US SDS / HazCom*

GHS classification*

ISO 9001:2015 site*

DOT shipping classification*

FDA status*

EPA status*

California Prop 65*

Reliable US supply chain

Regulatory compliance

On-time delivery

Technical expert support

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