sulfurous acid

noun

Definition of sulfurous acid 

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

First Known Use of sulfurous acid

1790, in the meaning defined above

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The first known use of sulfurous acid was in 1790

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sulfurous acid

noun

Medical Definition of sulfurous acid 

: 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

More from Merriam-Webster on sulfurous acid

Britannica.com: Encyclopedia article about sulfurous acid

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