Experimental characteristics
LogP: -0.13840
PSA: 82.40000
Merck: 14,8682
Refractive index: 1,484
Water solubility: 23 g/100 mL (20 ºC)
Melting point: 500 °c
Solubility: H2O: 1 M at 20 °C, clear, colorless
Color and properties: White powder or hexagonal prismatic crystal
PH: 9.0-10.5 (25°C, 1M in H2O)
Stability: Stable. Incompatible with strong acids. Moisture and air sensitive.
Solubility: Soluble in water, its aqueous solution is alkaline reaction. Insoluble in ethanol. Insoluble in liquid chlorine and ammonia
Sensitivity: Hygroscopic
Density: 2.633
Uses
First, it is used for the microanalytical determination of tellurium and niobium and the preparation of developing solutions, and is also used as a reducing agent.
Second, it is used in artificial fiber stabilizer, fabric bleaching agent, photographic developer, dyeing bleaching oxygen absorber, fragrance and dye reducing agent, papermaking lignin remover, etc.
Third, used as general analysis reagent and photoresistor material.
Fourth, reducing bleaching agent, has a bleaching effect on food and a strong inhibitory effect on oxidase in plant food.
Fifth, the printing and dyeing industry as a deoxidizer and bleaching agent, used for the cooking of various cotton fabrics, can prevent the local oxidation of cotton fiber and affect the fiber strength, and improve the whiteness of the cooking product. The photosensitive industry is used as a developer. The organic industry is used as a reducing agent for 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 during the reaction process. The paper industry is used as a lignin remover. The textile industry is used as a stabilizer for man-made fibers. The electronics industry is used to manufacture photoresistors. The water treatment industry is used for the treatment of electroplating wastewater and drinking water.
Sixth, the food industry is used as bleaching agent, preservative, loosening agent, antioxidant. It is also used in pharmaceutical synthesis and as a reducing agent in the production of dehydrated vegetables.
Seventh, used in the preparation of cellulose sulfite ester, sodium thiosulfate, organic chemicals, bleaching fabrics, etc., but also used as reducing agents, preservatives, dechlorinating agents, etc.
Eight, the laboratory is used for the preparation of sulfur dioxide.
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