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Sodium metabisulfite

Category:
CAS No.:7681-57-4
Product Grade: Food Grade
Purity / Assay: ≥98.0%
Molecular Formula:Na₂S₂O₅
Molecular Weight:190.11 g/mol
EINECS No.:231-673-0
Synonym(s):Sodium metabisulfite, Sodium pyrosulfite, Disodium metabisulfite
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Sodium metabisulfite, identified by CAS number 7681-57-4, is an inorganic chemical compound consisting of sodium, sulfur, and oxygen. Commonly appearing as a white crystalline powder or granular solid, it possesses a distinct, pungent sulfurous odor. As a potent reducing agent, it is highly valued for its ability to prevent oxidation and inhibit the growth of undesirable microorganisms in various industrial environments.

In terms of chemical behavior, sodium metabisulfite is soluble in water, where it undergoes hydrolysis to form sodium bisulfite. It is essential to handle this substance with care, as it can release sulfur dioxide gas when exposed to moisture or acidic conditions. Its stability and reactive properties make it a fundamental component in chemical synthesis, water purification, and as a stabilizer in numerous technical formulations.

• Water Treatment and Dechlorination: It is extensively utilized in water treatment facilities to remove excess chlorine from wastewater and industrial process water. By acting as a dechlorinating agent, it ensures that treated water meets safety standards before discharge, protecting aquatic ecosystems from the harmful effects of residual oxidants.

• Industrial Antioxidant and Preservative: In the food and beverage industry, sodium metabisulfite serves as a critical preservative and antioxidant. It helps maintain the color and flavor of dried fruits, vegetables, and wines by inhibiting enzymatic browning and preventing the growth of wild yeasts and bacteria during the fermentation and storage processes.

• Pulp and Paper Industry: The compound plays a significant role in the pulp and paper sector, where it is used as a bleaching agent and for the neutralization of residual hydrogen peroxide. Its reducing properties help achieve the desired brightness and quality of paper products while optimizing the chemical efficiency of the bleaching sequence.

• Chemical Synthesis and Mining: Sodium metabisulfite is employed as a reagent in the production of various chemicals and pharmaceuticals. Additionally, in the mining industry, it acts as a depressant in the flotation process for separating minerals and is used in the detoxification of cyanide in gold mining operations.

25 kg/bag, 25 kg/drum, 500 kg/IBC Drum
CAS No.: 7681-57-4

Product Name: Sodium metabisulfite

Purity / Assay:≥98.0%
Molecular Formula:Na₂S₂O₅
Molecular Weight:190.11 g/mol
EINECS No.:231-673-0
Synonym(s):Sodium metabisulfite, Sodium pyrosulfite, Disodium metabisulfite

Sodium metabisulfite, identified by CAS number 7681-57-4, is an inorganic chemical compound consisting of sodium, sulfur, and oxygen. Commonly appearing as a white crystalline powder or granular solid, it possesses a distinct, pungent sulfurous odor. As a potent reducing agent, it is highly valued for its ability to prevent oxidation and inhibit the growth of undesirable microorganisms in various industrial environments.

In terms of chemical behavior, sodium metabisulfite is soluble in water, where it undergoes hydrolysis to form sodium bisulfite. It is essential to handle this substance with care, as it can release sulfur dioxide gas when exposed to moisture or acidic conditions. Its stability and reactive properties make it a fundamental component in chemical synthesis, water purification, and as a stabilizer in numerous technical formulations.

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