sulfurous acid
noun
: a weak unstable dibasic acid H2SO3 known in solution and through its salts and used as a reducing and bleaching agent
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Otherwise, the sulfur dioxide released from the bubbling lava would turn the watery fluid in your eyes’ mucus membranes into sulfurous acid.
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Sofie Bates, Popular Mechanics, 30 June 2020
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Sofie Bates, Popular Mechanics, 30 June 2020
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“Sulfurous acid.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/sulfurous%20acid. Accessed 4 Nov. 2025.
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