Sodium bisulfite

Base Information

• Chemical Name: Sodium bisulfite
• CAS No.: 7631-90-5
• Molecular Formula: HNaO3S
• Molecular Weight: 104.06
• Hs Code.: 28321000
• Mol file: 7631-90-5.mol

Synonyms:Sulfurousacid, monosodium salt (8CI,9CI);E 222;FR-62;Hydrogen sodium sulfite;Hydrogen sulfite sodium;Monosodium sulfite;Sodium acid sulfite;Sodiumbisulfite;Sodium bisulfite (NaHSO3);Sodium bisulphite;Sodium hydrogensulfite;Sodium sulfite (NaHSO3);Sodium Bisulfite;Sodium hydrogen sulfite;

Chemical Property of Sodium bisulfite

Chemical Property:

• Appearance/Colour: white powder
• Melting Point: 150 °C
• PSA: 79.57000
• Density: 1.48 g/cm³
• LogP: 0.20420
• Storage Temp.: Store at RT.
• Solubility.: 300 g/L
• Water Solubility.: 300 g/L

Purity/Quality:

99% ^*data from raw suppliers

SodiumBisulfite(mixtureofNaHSO3andNa2S2O5) ^*data from reagent suppliers

Safty Information:

• Pictogram(s): Xn
• Hazard Codes: Xn
• Statements: 22-31-41-52
• Safety Statements: 26-39-46-25

MSDS Files:

SDS file from LookChem

Total 1 MSDS from other Authors

Useful:

• Uses: 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 inhibitors 5. Used as reducing agent, antiseptic, disinfectant and bleach. Reducing agent; convenient source of sulfur dioxide. As disinfectant and bleach, particularly for wool; in dyeing for preparing hot and cold indigo vats; in paper-making in place of sodium hyposulfite to remove Cl from bleached fibers; as stripper (reducer) in laundering; to remove permanganate stains from skin and clothing; to render certain dyes sol; manufacture of sodium hydrosulfite; coagulating rubber latex; as preservative for deteriorative liqs or solutions used for technical purposes; as antiseptic in fermentation industries. As preservative and bleach in food. Pharmaceutic aid (antioxidant). sodium bisulfite is a preservative and anti-oxidant, it is most frequently used as a pH adjuster. Sodium Bisulfite is a preservative that exists as a powder, with a solubility of 1 g in 4 ml of water. it prevents discoloration and inhib- its bacterial growth. it is used in dried fruit to inhibit browning and maintain the bright color. it is found in reconstituted lemon juice. see sulfur dioxide.
• Production method: Add sodium sulphite mother liquor (containing NaHSO3 40%, Ph value of 3 to 4) slowly into soda ash to generate sodium sulfite solution (to the slurry Ph value of 7~8 for the end); transfer the above sodium sulfite solution into series reactors (2 to 3) to absorb the SO2 gas (10% to 13%) from the combustion of sulfur, forming sodium bisulfite (to the reaction temperature no longer rising for the end). In the reaction process, a large number of crystals precipitate out, which is centrifuged to obtain the wet goods with moisture content of 6% to 10%, and then dehydrated by air drying at 250 to 300 ° C to make the final products. 2NaHSO3 + Na2CO3 → 2Na2SO3 + H2O + CO2↑ NaSO3+H2O→2NaHSO3 Absorb sulfur dioxide from the gas of sulfuric acid production with soda ash solution to generate sodium bisulfite. After further centrifugal separation and air drying at 250~300 ° C, the final sodium bisulfite is obtained. Na2CO3 + 2SO2 + H2O → 2NaHSO3 + CO2↑