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Na2SO3 Developing Solutions Preparation Inorganic Raw Materials Sodium Sulfite
Product Introduction:
Sodium sulfite, chemical formula Na2SO3, common sulfite, white, monoclinic crystal or powder. It has a stimulating effect on the eyes, skin, and mucous membranes, and can contaminate water sources. Toxic sulfide smoke is produced by high thermal decomposition. In industry, it is mainly used to produce cellulose sulfite, sodium thiosulfate, organic chemicals, bleached fabrics, etc. It is also used as a reducing agent, preservative, dechlorination agent, etc.
Basic Product Information:
Chinese name | sodium sulfite | CAS login number | 7757-83-7 |
Foreign name | sodium sulfite | melting point | 150℃ |
chemical formula | Na2SO3 | Water solubility | Easy to dissolve in water |
molecular weight | 126.04 | appearance | White, monoclinic crystal or powder |
Product Usage:
1. Used for trace analysis and determination of tellurium and niobium, preparation of developing solutions, and also as a reducing agent;
2. Used as a stabilizer for artificial fibers, fabric bleaching
agent, photographic developer, dye bleaching deoxidizer, fragrance
and dye reducing agent, papermaking lignin remover, etc;
3. Used as a common analytical reagent and photoresistor material;
4. Reductive bleaching agents have bleaching effects on food and
strong inhibitory effects on oxidases in plant-based foods. China's
regulations stipulate that it can be used for candied fruits, with
a maximum usage of 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 concentrate,
with a maximum usage of 0.60g/kg. The residual amount of bamboo
shoots, mushrooms, canned mushrooms, candied fruits, grapes, and
concentrated blackcurrant juice (calculated as SO2) is ≤ 0.05g/kg;
Potato starch residue ≤ 0.03g/kg; The residual amount of biscuits,
sugar, vermicelli and other varieties is less than 0.1g/kg; The
residual amount of liquid glucose shall not exceed 0.2g/kg;
5. As a deoxidizer and bleaching agent, the printing and dyeing
industry is used in the cooking of various cotton fabrics, which
can prevent local oxidation of cotton fibers and affect fiber
strength, and improve the whiteness of the cooked fabrics. The
photosensitive industry uses it as a developer. Organic industry is
used as a reducing agent in the production of meta
phenylenediamine, 2,5-dichloropyrazolone, anthraquinone-1-sulfonic
acid, 1-aminoanthraquinone, sodium aminosalicylate, etc., which can
prevent the oxidation of semi-finished products during the reaction
process. Used as a lignin removal agent in the paper industry. The
textile industry uses it as a stabilizer for synthetic fibers. The
electronics industry is used to manufacture photoresistors. The
water treatment industry is used for the treatment of
electroplating wastewater and drinking water;
6. Used in the food industry as a bleaching agent, preservative,
loosening agent, and antioxidant. Also used in pharmaceutical
synthesis and as a reducing agent in the production of dehydrated
vegetables;
7. Used for the production of cellulose sulfite, sodium
thiosulfate, organic chemicals, bleached fabrics, etc., as well as
reducing agents, preservatives, dechlorination agents, etc;
8 . Laboratory used for preparing sulfur dioxide