Sodium metabisulfite is also known as partial sodium sulfite, heavy sulfoxide, sodium metabisulfite, etc. The appearance is white or yellow crystalline powder or small crystals. It is acidic when dissolved in aqueous solution, and it can generate corresponding salts when contacted with strong acid. Sodium metabisulfite can be divided into technical grade sodium metabisulfite and food grade sodium metabisulfite.
Industrial grade sodium metabisulfite:
It can be used for leather treatment in leather making, making the leather soft and tough with the functions of waterproof, folding resistance and wear resistance.
Sodium metabisulfite used for printing and dyeing can be used as a deoxidizing agent for cotton cloth bleaching and as an auxiliary agent for cooking cotton cloth.
It is also used in the photographic industry as an ingredient for fixing agents, oilfield wastewater treatment, chromatographic analysis reagents and mine beneficiation agents.
Food grade sodium metabisulfite:
It can be used as bleaching agent in flour for making cakes, buns and other foods.
Used in the production of bread and biscuits and other foods to make it soft and taste better.
Adding it to fruit juice, candied fruit, canned food can prolong its shelf life, and it also has a sterilizing effect.
It has good antioxidant and fresh-keeping effects on seafood, fruits and vegetables.
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