REF : SODIUM BISULFITE 40% 25KG
25kg Jerry Can
Sodium bisulfite, also known as sodium hydrogen sulfite, is a salt with the molecular formula NaHSO₃. It exists only in aqueous solution and cannot be isolated in pure form. Used as a food additive (E222), it is obtained by the reaction between sulfur dioxide (SO₂) and sodium hydroxide (NaOH), producing sodium bisulfite and water.
MAIN FUNCTIONS
In addition to its use as a food additive, sodium bisulfite is widely used in industry as:
- Bleaching agent: Used in the bleaching process of papers with potassium dichromate to remove residual yellow tints, particularly in chromatography.
- Reducing agent: Used, for example, in ink erasers.
- Antichlor: Reacts with active chlorine to neutralize it, thus preventing continuous reactions and potential damage to treated materials.
INDUSTRIAL USE
- Sodium bisulfite is widely used in various industrial sectors, including food, cosmetics, and textiles. It is involved in the manufacture of various products such as bleached papers, ink erasers, and in dechlorination processes.
It is crucial in drinking water treatment. Water treatment plants use it to reduce concentrations of oxidizing compounds, such as ozone and active chlorine, before water distribution. By reacting with active chlorine, such as hypochlorous acid (HOCl), sodium bisulfite neutralizes this molecule, producing sulfuric acid (H₂SO₄) and sodium chloride (NaCl), which loses its oxidizing power.
USAGE INSTRUCTIONS.
Before use, read the safety data sheet and recommended precautions.
Synonyms:
Sodium bisulfite, sodium acid sulfite, sodium hydrogen sulfite in solution
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