Sodium sulfite CAS7757-83-7  is an inorganic compound. It is a white granular powder with a sulfur dioxide odor at room temperature, stable when dry, and sensitive to moisture. It is soluble in water and glycerol, insoluble in ethanol, and its aqueous solution is alkaline. Its aqueous solution is alkaline to litmus test paper and phenolphthalein, and reacts with acid to produce toxic sulfur dioxide gas. The pH of 1 Chemicalbook% aqueous solution is 8.3-9.4, indicating strong reducibility. When heated, it decomposes into sodium sulfide and sodium sulfate, and gradually oxidizes to sodium sulfate when placed in air. In nature, anhydrous sodium sulfite, heptahydrate sodium sulfite, and decahydrate sodium sulfite exist in three forms, among which anhydrous sodium sulfite is the least easily oxidized.

Specification

Molecular weight: 126.04

Character: This product is white crystal or powder; Odorless. This product is easily soluble in water, very slightly soluble in ethanol, and almost insoluble in ether.

Chemical formula: Na2SO3

CAS: 7757-83-7

Appearance: White hexagonal prismatic crystal

Melting point: 500 ° C

Density: 2.63

Refractive index: 1484

Storage conditions: Store at+5 ° C to+30 ° C

Application

Used as a catalyst for the addition stage reaction of urea formaldehyde resin synthesis. As a reducing agent, it can protect oxygen sensitive materials. It is also used as an antioxidant, antioxidant, and neutralizer. Anhydrous sodium sulfite can be used as a developer, in the preparation of cellulose sulfite esters, in the preparation of sodium thiosulfate, as a preservative for dried fruits and meat, as a deoxidizer in the printing and dyeing industry, and as a reducing chemical reagent. It is applied in the production and synthesis of chemical and laboratory applications.

Packing

25kg/drum

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