Toxic sulfide flue gas is produced by high thermal decomposition. In industry, it is mainly used to make cellulose sulfite, sodium thiosulfate, organic chemicals, bleached fabrics, etc. it is also used as reducing agent, preservative, dechlorination agent, etc.

1. It is used for microanalysis of tellurium and niobium, preparation of developer and reducing agent;
2. It is used as stabilizer of man-made fiber, bleaching agent of fabric, photographic developer, deoxidizer of dyeing and bleaching, reducing agent of perfume and dye, delignification agent of papermaking, etc;
3. It can be used as common analytical reagent and photosensitive resistance material;
4. Reducing bleaching agent can bleach food and strongly inhibit the oxidase in plant food. According to the regulation of our country, it can be used for preserves, and the maximum dosage is 2.0g/kg; It can also be used for glucose, liquid glucose, sugar, rock sugar, maltose, candy, bamboo shoots, mushrooms and canned mushrooms, grapes, blackcurrant concentrated juice, the maximum dosage is 0.60g/kg. The residues of bamboo shoots, mushrooms, canned mushrooms, candied fruits, grapes and blackcurrant concentrated juice (based on SO2) were less than or equal to 0.05 g / kg; Potato starch residue ≤ 0.03g/kg; The residues of biscuits, sugar, vermicelli and other varieties were less than 0.1g/kg; The residual amount of liquid glucose should not exceed 0.2g/kg;
5. As deoxidizer and bleaching agent, printing and dyeing industry is used in the scouring of various cotton fabrics, which can prevent local oxidation of cotton fiber and affect the fiber strength, and improve the whiteness of the scouring fabric. The photographic industry is used as a developer. In organic industry, it is used as reducing agent in the production of m-phenylenediamine, 2,5-dichloropyrazolone, anthraquinone-1-sulfonic acid, 1-aminoanthraquinone, sodium aminosalicylate, etc., which can prevent the oxidation of semi-finished products in the reaction process. It is used as lignin remover in paper industry. The textile industry is used as a stabilizer for man-made fibers. The electronic industry is used to make photoresistors. Water treatment industry for electroplating wastewater, drinking water treatment;
6. It is used as bleaching agent, preservative, loosening agent and antioxidant in food industry. It is also used in pharmaceutical synthesis and as reducing agent in the production of dehydrated vegetables;
7. It is used to prepare cellulose sulfite, sodium thiosulfate, organic chemicals, bleached fabrics, etc. it is also used as reducing agent, preservative, dechlorination agent, etc;
8. The laboratory is used to prepare sulfur dioxide.

Precautions for transportation: the package should be complete and the loading should be safe. During transportation, ensure that the container does not leak, collapse, fall or damage. It is strictly forbidden to mix with acids, edible chemicals, etc. During transportation, it should be protected from sunlight, rain and high temperature. The vehicles shall be thoroughly cleaned after transportation.