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1 definition found
 for H2SO3
From The Collaborative International Dictionary of English v.0.48 :

  Sulphurous \Sul"phur*ous\, a. [L. sulphurosus, sulfurosus: cf.
     F. sulfureux.]
     1. Of or pertaining to sulphur.
        [1913 Webster]
     2. (Chem.)
        (a) Derived from, or containing, sulphur; specifically,
            designating those compounds in which the element has a
            lower valence as contrasted with the sulphuric
        (b) Having the characteristic odor of sulphur dioxide, or
            of hydrogen sulphide, or of other sulphur compounds.
            [1913 Webster]
     Sulphurous acid.
        (a) Sulphur dioxide. See under Sulphur. [Obs.]
        (b) An acid, H2SO3, not known in the free state except
            as a solution of sulphur dioxide in water, but forming
            a well-known series of salts (the sulphites).
     Sulphurous anhydride (Chem.), sulphur dioxide. See under
        [1913 Webster]

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