Definition of sulphurous acid in English:

sulphurous acid

Line breaks: sul¦phur|ous acid
(also sulfurous acid)

noun

[mass noun] Chemistry
An unstable weak acid formed when sulphur 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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