KnowraSulfurous acidLinked fromLinked fromThe 6 pages that link to Sulfurous acid, each with the reason it gives.All 6Related 3Compared with 3Sulfuric acidCompared with: It contains sulfur in a lower oxidation state and is not the same substance as sulfuric acid.Carbonic acidCompared with: Like carbonic acid, it is associated with a dissolved gas and has limited persistence in water.Thiosulfuric acidCompared with: It shows a different way sulfur forms an unstable oxygen-containing acid.