Zinc(II) benzenesulfinate dihydrate is a specialty chemical primarily used in organic synthesis for the introduction of the benzenesulfonyl group. It is commonly employed in the preparation of sulfones through nucleophilic substitution reactions with alkyl halides, serving as a key intermediate in the production of pharmaceuticals, agrochemicals, and dyes. Additionally, it acts as a source of sulfonyl radicals in photoredox-catalyzed processes for selective C-S bond formation. Its mild reactivity makes it suitable for complex molecule synthesis where selectivity is essential. Furthermore, it finds applications in the formation of coordination complexes and as a reagent in advanced material science transformations.