anhydrous sodium sulfite, or as a white crystalline powder; odorless. This product is soluble in water and soluble in water (12.54g/100ml water at 0°C; 28.3g/100ml water at 80°C). The solubility is about 28% at 33.4°C. The aqueous solution is alkaline and the pH is about It is 9~9.5. It is easily oxidized to sodium sulfate in the air and decomposed into sodium sulfide in case of high temperature. In order to strengthen the reducing agent, it reacts with sulfur dioxide to form sodium hydrogen sulfite, and reacts with a strong acid to form a corresponding salt.
Anhydrous sodium sulfite is used for film development
as a reducing agent and sulfonating agent in the chemical industry;
Dechlorination and bleaching agents in the printing and dyeing industry;
Stabilizers for chemical fibers, etc.
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