Sodium Bisulfite

Sodium bisulfite is a white crystalline solid or powder, typically odorless or with a faint sulfur dioxide odor, and highly soluble in water; it decomposes before melting and releases SO₂ upon heating or acidification. It is an inorganic salt and reducing agent, commonly formulated as NaHSO₃ (often as a hydrated or aqueous solution). It serves primarily as a preservative, antioxidant, and sulfonating agent in industrial processes, and is widely employed as a key intermediate in the synthesis of organic sulfonates, dyes, and pharmaceuticals. Typical application areas include food preservation (as a processing aid), water treatment (for chlorine removal), pulp and paper bleaching, and the production of dyes, leather tanning agents, and certain agrochemical formulations.

1. Used as reducing agent, food preservatives and bleach.2. Used for the bleaching of cotton fabric and organic substance. Used as reducing agents in dyes, paper, leather, chemical synthesis and other industries. Used for the production of analgin and aminopyrine intermediates in pharmaceutical industry. Used as bleach, preservatives, and antioxidants of food grade products. 3. Sodium bisulfite is reduction bleach allowed to use in China. It has bleaching effect on food and has a strong inhibitory effect on the oxidase within plant foods. It can be used for candied fruit, glucose, sugar, rock candy, caramel, candy, liquid glucose, dried fruit, dried vegetables, vermicelli, bamboo shoots, mushrooms and mushroom cans in provisions of our country, with a maximum use of 0.45g/kg; it can also be used for potato starch with a maximum use amount of 0.2g/kg and a maximume residual amount (in terms of SO2) of less than 0.03 g/kg.4. Used as reductants in analysis and also as bleach and bacterial inhibitors5. Used as reducing agent, antiseptic, disinfectant and bleach.
white monoclinic crystal; sulfur dioxide odor; soluble in water, slightly soluble in alcohol.

This chemical is included in Fine Chemicals - Food Additives. See more about what is Sodium Bisulfite and Sodium Bisulfite SDS information.

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