sulfurous acid

noun

: a weak unstable dibasic acid H₂SO₃ known in solution and through its salts and used as a reducing and bleaching agent

Examples of sulfurous acid in a Sentence

Recent Examples on the Web

Otherwise, the sulfur dioxide released from the bubbling lava would turn the watery fluid in your eyes’ mucus membranes into sulfurous acid. —Sofie Bates, Popular Mechanics, 30 June 2020

Word History

First Known Use

1790, in the meaning defined above

Kids Definition

sulfurous acid

noun

: a weak acid known especially in mixtures of sulfur dioxide with water and through its salts and used in bleaching

Medical Definition

sulfurous acid

noun

: a weak unstable dibasic acid H₂SO₃ known in solution and through its salts and used as a reducing and bleaching agent and in medicine as an antiseptic