Sodium Metabisulphite CAS 7681-57-4 Powder Granular

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Sodium Metabisulphite CAS 7681-57-4 Powder Granular

Product Overview

Sodium Metabisulphite also known as Sodium Pyrosulfite is a widely used inorganic sulfur compound in global chemical industries. This chemical compound carries CAS 7681-57-4 with molecular formula Na₂S₂O₅. Available in two common physical forms including powder and granular, the chemical features stable chemical properties and excellent water solubility for diverse industrial applications. Complete MSDS download service is accessible for qualified buyers to obtain safety guidance documents. This product has completed REACH registration to meet European market import standards.

Chemical Aliases

This chemical owns multiple industry aliases for global trade scenarios, includingSodium Pyrosulfite, Disodium Metabisulfite, Sodium Metabisulfite and Disodium Dithionite.

Common Product Specifications

Below displays the most popular industrial grade specification ofSodium Metabisulphite for bulk import procurement:

Traits and Physical Properties

Appearance: White to slight yellow crystalline powder and granular solid

Molecular Weight: 190.09

Relative Density: 1.4

Melting Point: 150 °C (decomposition)

Solubility: Easily soluble in water, slightly soluble in ethanol

Odor: Pungent sulfur dioxide odor

Stability: Unstable in humid air, easy to oxidize and decompose

Industrial Applications

Sodium Metabisulphite serves as a critical additive in multiple mainstream industries. It acts as an effective bleaching agent, reducing agent and preservative for industrial production. Detailed application scenarios are listed as follows:

Food Industry: Used as food preservative, bleaching agent and antioxidant for dried fruits, beverages and bakery products

Textile Industry: Applied for fabric bleaching, dechlorination and printing and dyeing processing

Water Treatment: Function as deoxidizer and heavy metal remover for industrial wastewater purification

Chemical Industry: Raw material for producing sulfite salts and other sulfur-containing chemical products

Paper Making Industry: Used for pulp bleaching to improve paper whiteness

Mining Industry: Auxiliary reagent for mineral flotation and separation

FAQ

1. What are the mainstream packaging forms of Sodium Metabisulphite for export?

Standard export packaging adopts 25kg woven bags or kraft paper bags with inner plastic lining. Customized bulk packaging is available for large-scale ocean shipment to meet international import logistics requirements.

2. Is Sodium Metabisulphite compliant with European import regulations?

This chemical has completed REACH registration, which fully complies with European chemical import rules. Qualified MSDS download files are prepared for customs clearance and safety inspection.

3. What storage conditions are suitable for this chemical?

Sealed storage in dry, cool and ventilated warehouses is required. Keep away from moisture, high temperature and oxidants to avoid chemical decomposition and quality deterioration during transportation and storage.

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