Used as an oxidizing agent in organic synthesis, particularly in allylic oxidation reactions to convert alkenes into α,β-unsaturated carbonyl compounds. Commonly employed in the production of selenium-containing pharmaceuticals and specialty chemicals. Acts as a catalyst or reagent in the synthesis of dyes, pigments, and rubber vulcanization agents. Also utilized in the glass industry to decolorize glass or impart a ruby-red color, and in metallurgy for refining certain metals. Additionally, finds use in electronic components and semiconductor materials due to its photoconductive properties.