Sodium Sulfite

Content：>72%

Packing method：40kg woven bag packaging

Product introduction：

It smells of sulfur dioxide. Stable when dry. Sensitive to humidity. It is more stable than crystalline sodium sulfite, but it can be oxidized to sodium sulfate after long storage, and then decomposed into sodium sulfate and sodium sulfide after heating. Soluble in water, glycerin, insoluble in ethanol.

Application：

It is used in the production of water reducing agent, cellulose sulfite, sodium thiosulfate, organic chemicals, bleached fabrics, etc. it is also used as reducing agent, preservative, dechlorinating agent, etc.

Properties

Sodium sulfite is an inorganic compound. It is a white granular powder at room temperature, soluble in water and reducing. It is disproportioned into sodium sulfide and sodium sulfate when heated and gradually oxidized into sodium sulfate when placed in air. It can exist in three forms: anhydrous matter, heptahydrate and decahydrate, of which anhydrous matter is the most difficult to be oxidized. Its aqueous solution is alkaline due to hydrolysis and releases toxic sulfur dioxide gas during acidification. Sodium sulfite can be prepared by introducing sulfur dioxide into sodium hydroxide solution. When sulfur dioxide is excessive, sodium bisulfite will be generated. Sodium sulfite can be used as developer, preservative of dried fruit and meat, Deoxidizer in printing and dyeing industry, and reducing chemical reagent. It is used in chemical industry and laboratory production and synthesis.

CAS No.

7757-83-7

Formula

Na2O3S

Molecular Mass

126.04300

Exact Mass

125.93600

PSA

82.40000

Logp

-0.13840