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sodium bisulfite : ウィキペディア英語版 | sodium bisulfite
|Section2= |Section7= |Section8= }} Sodium bisulfite (sodium hydrogen sulfite) is a chemical compound with the chemical formula NaHSO3. Sodium bisulfite is a food additive with E number E222. This salt of bisulfite can be prepared by bubbling sulfur dioxide in a solution of sodium carbonate in water. Sodium bisulfite in contact with chlorine bleach (aqueous solution of sodium hypochlorite) will generate heat and form sodium bisulfate and sodium chloride. ==Synthesis== Sodium bisulfite can be prepared by bubbling excess sulfur dioxide through a solution of suitable base, such as sodium hydroxide or sodium bicarbonate. :SO2 + NaOH → NaHSO3 :SO2 + NaHCO3 → NaHSO3 + CO2
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