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Sodium Metabisulfite CAS#7681-57-4
Basic Information
Na₂S₂O₅
white crystalline or powdery solid
Sodium metabisulfite is a white crystalline reducing agent that may release sulfur dioxide on heating or contact with acids. Its chemistry supports antioxidant, preservative, bleaching, and dechlorination functions. It is used in food and beverage processing, textile printing, papermaking, water treatment, leather processing, pharmaceutical preparations, photography, rubber, and agriculture, with grade and process controls determining suitability.
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Chemical Identity and Appearance: Sodium metabisulfite (CAS#7681-57-4) is an inorganic compound with the formula Na₂S₂O₅. It is typically supplied as a white crystalline powder. Purity and other quality parameters should be confirmed through the batch-specific certificate of analysis.
Odor and Handling Precautions: The material may have a pungent sulfur dioxide odor. Released sulfur dioxide can irritate the respiratory tract; avoid inhalation and use appropriate ventilation. Odor should not be used as a method of identification or a measure of safe exposure.
Thermal Decomposition: Sodium metabisulfite decomposes upon heating, releasing sulfur dioxide (SO₂). Contact with acids also releases SO₂ and requires appropriate handling controls.
Reducing Properties and Applications: Sodium metabisulfite is used as a reducing agent in chemical processing and in selected antioxidant, preservative, and bleaching applications. Suitability depends on the product grade, intended use, and applicable requirements.
Product Description of Sodium Metabisulfite CAS#7681-57-4
Sodium Metabisulfite (Na₂S₂O₅) is a white crystalline or powdery solid with a faint sulfur odor. It is toxic by inhalation and causes severe irritation to skin and mucosal tissues. At high temperatures, it decomposes, releasing toxic fumes of sulfur oxides and sodium oxide.
Product Application of Sodium Metabisulfite CAS#7681-57-4
Sodium Metabisulfite has strong reducing properties. It is widely used in the food industry as an antioxidant, preservative and bleaching agent for meat, wine, preserved fruits and other products.
It is also extensively applied in textile printing and dyeing, papermaking and pulping, water treatment, leather softening and other chemical processes. In the pharmaceutical industry, it acts as a synthetic intermediate and an antioxidant for injectable preparations. Additionally, it is used in photography, rubber processing, agriculture and other fields.
Notably, Sodium Metabisulfite releases toxic sulfur dioxide when contacting acids. It should be stored in a tightly sealed container in a cool and dry place, and kept away from acids and oxidizing agents.
Parameters
Safety Information
Delivery Time
Inventory 2-3 working days New manufacturing 7-10 working days
Mode of Transportation
1. By Air, fast but expensive.
2. By Sea, usual and economy.
3. By Train, suit for middle Asia countries.
4. By Express, suit for small package.
We only provide highest quality goods available, accompanied by after support!
1. What products does Shandong Junzheng Chemical supply?
We supply inorganic chemicals, organic solvents, water treatment chemicals, and surfactants, including calcium chloride, soda ash, sodium bicarbonate, caustic soda, citric acid, ethyl acetate, and SLES. Please contact us to confirm specific product availability.
2. Which industries do your products serve?
Our products serve pharmaceutical, agrochemical, dye, rubber, construction, coal processing, and other chemical industries. Product suitability depends on the required grade, specifications, and application.
3. How can I get a quotation?
Please provide the product name, CAS number, required specifications, quantity, packaging requirements, and destination port. These details help us prepare an accurate quotation.
4. How do you control product quality?
We follow strict quality testing procedures supported by technical personnel, research equipment, and an established management system. Specific quality requirements can be confirmed before placing an order.
5. Can you help me select a suitable chemical?
Yes. Our technical team can assist with product selection based on your application and required specifications. Please share your intended use and key technical requirements.
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