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Sodium Metabisulfite
Strong Reducing Properties:Sodium metabisulfite is a strong reducing agent that releases bisulfite ions in aqueous solution, effectively removing dissolved oxygen and residual chlorine from water and preventing equipment corrosion.
Excellent Oxygen Scavenging and Corrosion Prevention Properties:Sodium metabisulfite is used as a highly efficient oxygen scavenger in boiler water treatment and industrial circulating water treatment. In the food industry, it is used as a preservative and antioxidant, effectively extending product shelf life.
Good Water Solubility and Compatibility:Sodium metabisulfite is readily soluble in water, and its aqueous solution is acidic. It exhibits good compatibility with various water treatment agents and food ingredients, facilitating compounding.
Wide Compatibility Across Multiple Fields:Sodium metabisulfite possesses multiple functions, including reducing agent, oxygen scavenger, preservative, antioxidant, bleaching agent, mordant, and rubber coagulant. It is widely used in water treatment, food, pharmaceutical, chemical, and photography industries.
Safety Precautions:Sodium metabisulfite is a white to slightly yellow crystalline powder with a sulfur dioxide odor. It should be stored in a cool, dry, and well-ventilated place, and should be kept away from acids and oxidizers.
Product Description
Sodium Metabisulfite Product Description CAS#7681-57-4
Sodium metabisulfite, also known as sodium metabisulfite or sodium disulfide, has the chemical formula Na₂S₂O₅ and a molecular weight of 190.11. At room temperature, it is a white to slightly yellow crystalline powder with a sulfur dioxide odor. Its density is approximately 1.48 g/cm³, and its melting point is 150°C (decomposes). In terms of solubility, sodium metabisulfite is soluble in water (resulting in an acidic aqueous solution), soluble in glycerol, and slightly soluble in ethanol. Industrially, sodium metabisulfite is mainly produced by absorbing sulfur dioxide into sodium carbonate or sodium hydroxide solution and then crystallizing it. Sodium metabisulfite is a strong reducing agent, releasing bisulfite ions (HSO₃⁻) in aqueous solution, exhibiting reducing and antioxidant properties. These unique chemical properties make it widely applicable in water treatment, food, pharmaceuticals, and chemical industries.
Sodium metabisulfite Product Applications CAS#7681-57-4
Sodium metabisulfite is an important reducing agent and antioxidant, widely used in water treatment, food, pharmaceuticals, chemicals, and photography industries.
In water treatment, sodium metabisulfite is used as a cleaning agent for reverse osmosis membranes in drinking water. It is also used to remove chloramines from drinking water. In boiler water treatment and industrial circulating water treatment, it is used as a deoxygenating agent, effectively removing dissolved oxygen and preventing equipment corrosion. It is also used in the reduction treatment of industrial wastewater, such as chromium-containing wastewater.
In the food industry, sodium metabisulfite is used as a food preservative and antioxidant. It is an active ingredient in Campden tablets and is used in winemaking and food preservation.
In the pharmaceutical industry, sodium metabisulfite is used as an antioxidant and stabilizer in pharmaceutical preparations. In the chemical industry, sodium metabisulfite is used as a bleaching agent, mordant, reducing agent, and rubber coagulant. It is used in organic synthesis, pharmaceuticals, and fragrance production. In the photography industry, sodium metabisulfite is used in fixing and developing solutions in photographic processing.
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