Disulfurous acid

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Disulfurous acid, metabisulfurous acid or pyrosulfurous acid is an oxoacid of sulfur with the formula H2S2O5. Its structure is HO−S(=O)2−S(=O)−OH. The salts of disulfurous acid are called disulfites or metabisulfites.

Excerpt from the Wikipedia article “Disulfurous acid”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

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