sulfurous acid

Also found in: Dictionary, Thesaurus, Legal, Encyclopedia, Wikipedia.

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

/sul·fur·ous ac·id/ (sul´fūr-us)
1. a solution of sulfur dioxide in water, H2SO3; used as a reagent.

sulfurous acid (H2SO3)

a weak inorganic acid formed by dissolving sulfur dioxide in water, used as a chemical-reducing and bleaching agent. It has been used in medicine in skin lotions and nasal and throat sprays. Sulfites formed by the acid may be included in antiseptics, antifermentatives, and antizymotics. Sulfurous acid is stable only in aqueous solutions; it decomposes into sulfur dioxide and water on standing. It is a major component of acid rain.

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 ?
Soil organic carbon (OC) content (g C/kg soil) determined by dry combustion in soils pre-treated with sulfurous acid ([H.
Second, sulfurous acid is always regarded as acid aseptic because it can consume the oxygen in the TCM issues and inhibit the bioactivity of necessary enzymes in microorganisms (Duan et al.
Because of the solubility of calcite in acid, limestone readily deteriorates when exposed to the nitric, sulfuric, and sulfurous acids in polluted air and precipitation.
More publicly and controversially, he conducted experiments on twelve young men, feeding them controlled diets of foods laced with borax, sulfurous acids, and other commonly used preservatives.