Sodium Metabisulfite, with the chemical formula Na2S2O5 and CAS number 7681-57-4, is a versatile and widely used inorganic compound known for its strong antioxidant and preservative properties. This white to yellowish crystalline powder is highly soluble in water, making it an essential ingredient in various industrial, food applications. Due to its ability to release sulfur dioxide (SO2) when dissolved in water, Sodium Metabisulfite acts as an effective reducing agent, disinfectant, and preservative, ensuring product stability and longevity.
The compound Sodium Metabisulfite (CAS 7681-57-4) is commonly employed in the food industry as a preservative and antioxidant. It helps prevent the oxidation of food products, thereby maintaining their color, flavor, and freshness for longer periods. It is often used in the preservation of dried fruits, beverages, and processed foods. Its properties also inhibit the growth of bacteria and fungi, making it a reliable additive in maintaining food safety standards.
Industrially, Sodium Metabisulfite (CAS 7681-57-4) plays a crucial role in water treatment, textile processing, and photography. In water treatment, it is used to remove excess chlorine and chloramine from drinking water and wastewater, ensuring safe water quality. In the textile industry, it serves as a bleaching agent and a reducing agent during dyeing processes, improving fabric quality and appearance. In photography, it is an important component in developer solutions, aiding in the development of photographic films and papers by preventing oxidation of the developing agents.
Moreover, Sodium Metabisulfite is employed in chemical manufacturing as a reducing agent in various chemical reactions. Its ability to release sulfur dioxide makes it valuable in sulfite-based chemical processes, including the synthesis of other sulfur-containing compounds. It also finds use in pulp and paper industries where it functions as a bleaching and dechlorinating agent, contributing to environmentally friendly production methods.
Safety and handling of Sodium Metabisulfite (Na2S2O5) require attention due to its reactive nature. When exposed to moisture or acidic conditions, it releases sulfur dioxide gas, which can be irritating to the respiratory system. Appropriate protective equipment and ventilation are recommended during its handling and storage. Despite these precautions, its benefits and efficacy in various applications make it an indispensable chemical across multiple sectors.
| Chemical Name | Sodium Metabisulfite |
| CAS Number | 7681-57-4 |
| Chemical Formula | Na2S2O5 |
| Appearance | White crystalline powder |
| Purity | > 98% |
| Moisture Content | < 1% |
| pH (1% solution) | 4.5 - 6.0 |
| Loss on Drying | < 1.5% |
| Heavy Metals (as Pb) | < 0.001% |
| Usage | Industrial and food grade applications |
In the food industry, Na2S2O5 is commonly employed as a preservative and antioxidant. It helps to maintain the freshness and color of dried fruits, beverages, and processed foods by preventing microbial growth and oxidation. This makes it ideal for use during food processing, packaging, and storage, ensuring prolonged shelf life and quality retention. Additionally, it is often used in winemaking and brewing to inhibit the growth of unwanted bacteria and wild yeasts, thus preserving the flavor and stability of the final product.
Another significant application of Sodium Metabisulfite takes place in water treatment scenarios. Na2S2O5 acts as a dechlorinating agent, effectively removing excess chlorine from water before it is used in industrial processes or discharged into the environment. This is crucial in water purification plants and wastewater treatment facilities where controlling chlorine levels is necessary to protect aquatic life and comply with environmental regulations.
In the textile and paper manufacturing industries, Sodium Metabisulfite serves as a bleaching agent and reducing agent. It is utilized in bleaching fabrics and paper pulp, enhancing the brightness and quality of the final products. The compound’s ability to break down dyes also makes it useful for removing unwanted color during fabric processing or recycling.
Our Sodium Metabisulfite product is supported by a dedicated technical support team ready to assist with any inquiries regarding its applications, handling, and safety measures. We offer comprehensive guidance to ensure optimal use in various industries including water treatment, food preservation, and chemical manufacturing.
Technical services include detailed product information, safety data sheets, storage recommendations, and troubleshooting assistance. Our experts can provide advice on dosage, compatibility with other chemicals, and regulatory compliance to help you achieve the best results.
Additionally, we offer customized solutions and bulk supply options to meet specific customer needs. Whether you require assistance with product selection or need support during the application process, our team is committed to delivering timely and effective service.
For further technical support and services related to Sodium Metabisulfite, please refer to our product documentation or reach out to our support team through the appropriate channels.
Product Packaging and Shipping for Sodium Metabisulfite:
Sodium Metabisulfite is typically packaged in moisture-resistant bags or drums to ensure product stability and prevent contamination. Common packaging options include 25 kg or 50 kg kraft paper bags with a polyethylene inner lining, or plastic drums for larger quantities.
During shipping, the product should be handled with care to avoid exposure to moisture and extreme temperatures. It is recommended to transport Sodium Metabisulfite in sealed containers and keep it away from incompatible substances such as acids and oxidizers.
Ensure that all packaging is clearly labeled with product name, grade, batch number, net weight, and safety information. Follow all relevant regulations and guidelines for the transportation of chemical substances to guarantee safe and secure delivery.
Q1: What is Sodium Metabisulfite used for?
A1: Sodium Metabisulfite is commonly used as a disinfectant, antioxidant, and preservative in various industries such as food processing, water treatment, and photography.
Q2: What is the chemical formula of Sodium Metabisulfite?
A2: The chemical formula of Sodium Metabisulfite is Na2S2O5.
Q3: How should Sodium Metabisulfite be stored?
A3: Sodium Metabisulfite should be stored in a cool, dry place away from moisture and incompatible substances such as acids and oxidizers.
Q4: Is Sodium Metabisulfite safe to handle?
A4: When handling Sodium Metabisulfite, it is important to use proper protective equipment like gloves and goggles, as it can cause irritation to the skin, eyes, and respiratory system.
Q5: Can Sodium Metabisulfite be used in food products?
A5: Yes, Sodium Metabisulfite is used as a food additive (E223) to preserve freshness and prevent browning in dried fruits, wines, and other food items, following regulatory guidelines.
