Definition of sulfurous acid in English:

sulfurous acid

Syllabification: sul·fur·ous ac·id

noun

Chemistry
  • An unstable weak acid formed when sulfur dioxide dissolves in water. It is used as a reducing and bleaching agent.
    • Chemical formula: H2SO3
    More example sentences
    • Common reductants are the active metals, hydrogen, hydrogen sulfide, carbon, carbon monoxide, and sulfurous acid.
    • Sulphur dioxide (which forms sulphurous acid in water) is used for commercial dried fruit.
    • Sorbic acid, a preservative; tartaric acid, a stabiliser; and citric and sulphurous acid - that's sulphur dioxide to you and me - are all regularly added during the wine making process.

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a slit made by cutting with a saw