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Packing: external polypropylene woven bag, lined polythene plastic bag, paper-plastic composite bag, kraft paper bag, etc.
Net weight: 25, 50, 1000 kg/bag or according to customer requirements.

Product uses
1.For tellurium and niobium microanalysis and determination and developer preparation, also used as a reducing agent;
2.Used in artificial fiber stabilizer, fabric bleach agent, photographic developer, dyeing bleaching deoxidizer, spice and dye reducing agent, lignin removal agent for papermaking, etc.
3.Used as general analytical reagent and photosensitive resistance material;
4.Reductive bleach agent, has the bleaching effect to the food and has the strong inhibition effect to the oxidase in the plant food. In China's regulations, it can be used for preserves, the maximum use of 2.0g/kg; It can also be used for glucose, liquid glucose, sugar, rock sugar, caramel, candy, bamboo shoot, mushroom and canned mushroom, grape, black currant juice concentrate, the maximum use of 0.60g/kg. Residues of bamboo shoot, mushroom and canned mushroom, candied fruit, grape and black currant concentrate (SO2)≤0.05g/kg; Potato starch residue ≤0.03g/kg; Residues of biscuits, sugar, vermicellin and other varieties were less than 0.1g/kg; the residual amount of liquid glucose shall not exceed 0.2g/kg;
5.In the printing and dyeing industry, used as a deoxidizer and bleaching agent, used for all kinds of cotton fabric cooking, can prevent local oxidation of cotton fiber and affect the fiber strength, and improve the whiteness of boiled products. Used as a developer in the photographic industry. In the organic industry, used as m-phenylenediamine, 2, 5-dichloropyrazolone, anthraquinone-1-sulfonic acid, 1-amino-anthraquinone, sodium aminosalicylate production reducing agent, can prevent the oxidation of semi-finished products in the process of reaction. Used as lignin remover in paper industry. Used in the textile industry as a stabilizer for artificial fibers. Used in the electronics industry to manufacture photosensitive resistors. In the water treatment industry for electroplating wastewater, drinking water treatment;
6.In the food industry, used as a bleaching agent, preservative, loosening agent, antioxidant. Also used in pharmaceutical synthesis, dehydrated vegetable production as a reducing agent;
7.It is used for making cellulose sulfite, sodium thiosulfate, organic chemicals, bleached fabrics, etc., and also used as reducing agent, preservative, dechlorination agent, etc.
8.Used in the laboratory to prepare sulfur dioxide