Industrial grade sodium metabisulfiteAlso known as heavy sulfur oxygen, also known as heavy sodium sulfite, or sodium metabisulfite. Slow oxidation and release of SO2; with caustic soda or soda ash solution as a reaction can generate sodium sulfite; and can form adducts with other aldehydes. The solid sodium metabisulfite was heated to 15022 to begin decomposition. Sodium metabisulfite will have some adverse social effects on various management systems, organs and tissue students of our human body, and its residual product, sulfur dioxide, will generate corrosive sulfurous acid, sulfuric acid and sulfate in moist mucus. This will enhance the irritating effect and damage the bronchi and lungs to induce various respiratory inflammation.

In addition, sodium metabisulfite is a carcinogen. Therefore, strict management and control of sulfur dioxide residues in agricultural products is of great significance for enterprises to control table pollution and protect consumers' mental health rights and interests. Sodium metabisulfite is divided into industrial grade and food grade, and its quality index is different.

　　Industrial grade sodium metabisulfiteWidely used. In the pharmaceutical industry, it is used for the purification of chloroform, phenylsulfone and benzaldehyde; it is used as a coagulant in the rubber industry; industrial grade sodium metabisulfite is used as a dechlorination agent after bleaching of cotton in the printing and dyeing industry, cotton scouring auxiliaries and printing and dyeing mordant; industrial grade sodium metabisulfite is used in the leather industry. In the leather treatment, the leather can be soft, plump, toughness, waterproof, bending resistance, wear resistance and other properties, used in the chemical industry to produce hydroxy vanillin, hydroxylamine hydrochloride and so on.

But the use of food grade sodium metabisulfite can be used as a biscuits, pastries and other food bleach and leavening agent, vegetables for dehydration of nutritional needs to maintain the agent, fruit products storage preservatives, brewing and beverage sterilization and preservatives. Slow oxidation to sodium sulfate in humid air is accompanied by disintegration of the crystals. The aqueous solution is decomposed in air, especially under heating conditions, and nitrogen should be filled when autoclaving. Glucose reduces the stability of aqueous solutions. Stable and effective in acidic solution. Should be stored in a closed container, away from light, cool and dry place.

Industrial grade sodium metabisulfite pharmacological effects

Sodium metabisulfite is widely used as an antioxidant in oral and topical preparations and injections, and is also widely used in foods. As with other sulfites, there are some serious and fatal side effects, including bronchospasm and allergic reactions. If ingested after oral absorption on the stomach irritation. Sodium metabisulfite has a more complex compatible reaction with chloramphenicol events. Incompatible with phenylmercuric acetate when used in eye drops when autoclaved. Reacts with the rubber stopper on the vial, so it is best to treat the rubber stopper with sodium metabisulfite first.