sulfurous acid


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sul·fu·rous ac·id

(sŭl'fŭ-rŭs as'id),
A solution of about 6% sulfur dioxide in water; used chiefly as a disinfectant and bleaching agent; has been used externally for its parasiticidal effect in various skin diseases.

sulfurous acid

H2SO3, an inorganic acid and a powerful chemical reducing agent used commercially, esp. for as a bleach.
CAS # 7782-99-2
See also: acid
References in periodicals archive ?
Sulfurous acid pre-treatment followed by dry combustion and correcting for carbonate-C by subtracting carbonate-C from total C were unsuccessful in determining OC in the Calcarosols.
One of those pathways, as you mention, first creates sulfurous acid that then reacts with oxygen to make sulfuric acid In the other set of reactions, sulfur dioxide reacts with oxygen to make sulfur trioxide, which then reacts with water to create sulfuric acid.--Sid Perkins
The Wine Titrino package contains a comprehensive application file with clearly-laid-out and detailed method descriptions, with parameters and titration curve examples as well as examples about the determination of: pH value, total titratable acidity, free sulfurous acid, total sulfurous acid, volatile acids, fixed acidity, ascorbic acid (vitamin C), reducing sugars, carbon dioxide, ash and ash alkalinity, calcium and magnesium, chloride, total phosphorus, sulfate, Na, NH4, K, F, alcohol.
Of the compounds tested, sulfurous acid showed the greatest toxicity in all three types of cells, whereas sodium nitrate showed the least.
Spermeiogenesis of rat, mouse, hamster and guinea pig as revealed by the "periodic acid-fuchsin sulfurous acid" technique.