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Chemical Name: Sodium Pyrosulfite
Molecular Formula: Na2S2O5
Molecular Weight: 190.14 g/mol
CAS Number: 7681 - 57 - 4
EINECS: 231 - 673 - 0
White crystalline powder or lumps.
Reducing Agent: It is a strong reducing agent and can react with oxidizing agents to reduce them. This property makes it useful in various chemical reactions and industrial applications where reduction is required.
Acid - Alkali Property: It is slightly acidic in aqueous solution. When dissolved in water, it dissociates into sodium ions and pyrosulfite ions, showing certain acidity characteristics.
Hygroscopic: It has strong hygroscopicity and can absorb moisture from the air easily, which may affect its storage and handling.
Preservative: Sodium pyrosulfite is used as a preservative in some food products. It inhibits the growth of microorganisms and helps to maintain the quality and freshness of the food. For example, it can be used in canned fruits and vegetables to prevent spoilage.
Bleaching Agent: It can act as a bleaching agent in the food industry, especially for flour and some starch - based products. It helps to whiten the product and improve its appearance.
Reducing Agent in Pharmaceuticals: In pharmaceutical manufacturing, sodium pyrosulfite can be used as a reducing agent in certain drug formulations. It helps to maintain the stability of the active ingredients and prevent their oxidation.
Antioxidant in Medicinal Preparations: It can also function as an antioxidant in some medicinal preparations, protecting the drugs from oxidative degradation.
Reagent in Chemical Reactions: Sodium pyrosulfite is widely used as a reagent in various chemical reactions. It is often used in redox reactions due to its reducing properties. For example, it can be used in the synthesis of some organic compounds.
Industrial Bleaching Agent: In the textile and paper industries, it can be used as a bleaching agent to remove color from fibers or pulp.
