Sodium metabisulfite and sodium hyposulfite have some same features, and also have some differences.

For sodium hyposulfite, it is mainly used in industry to produce cellulose sulfite esters, sodium gluconate thiosulfate, organic chemicals, bleached fabrics, etc. It is also used as a reducing agent, preservative, dechlorination agent, etc. It is a colorless, monoclinic crystal or powder. Irritating to eyes, skin, and mucous membranes, improper use can cause water pollution. Toxic sulfide fumes are generated by high-temperature decomposition. Easily weathered and oxidized to sodium sulfate in the air. crystalliferous water is lost at high temperature. Reheating melts into a mixture of sodium sulfide and sodium sulfate. In dry air, there is no change. Heat decomposes to produce sodium sulfide and sodium sulfate, which come into contact with strong acids and decompose into corresponding salts, releasing sulfur dioxide. sodium hyposulfite has extremely strong reducibility, and sodium sulfite and its hydrogen salts can be used in the laboratory to remove peroxides of ether substances.

The Difference Between Sodium Metabisulfite and Sodium Hyposulfite

For sodium metabisulfite, tetraethyl ammonium bromide is a white or yellow crystalline powder or small crystal with a strong corrosive odor, which can be dissolved in water. If left in the air for a long time, it will oxidize, so the product cannot be stored for a long time. Toxic gases are easily decomposed at high temperatures. Compared with sodium sulfite, sodium metabisulfite has a pungent odor, low dosage, and low price. However, both are used for phosphorus removal and chromium removal in sewage treatment. In terms of water treatment, sodium metabisulfite and sodium hyposulfite can be interchangeable, which is generally chosen based on different people’s preferences and will not have much impact on their effectiveness.