hyposulfurous acid

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Related to hyposulfurous acid: Persulfuric acid

hy′po•sul•fur′ous ac′id

(ˈhaɪ pə sʌlˈfyʊər əs, -ˈsʌl fər əs, ˌhaɪ-)
an acid, H2S2O4, next in a series below sulfurous acid, known only in solution or in the form of its salts.
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