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methyl 4,5-diaminothiophene-2-carboxylate dihydrochloride; CAS No.: 1452518-88-5; Specializing in key intermediates, we provide diaminothiophene dihydrochlorides for organic electronics. The methyl ester and vicinal diamino groups enable polythiophene precursor synthesis. Our controlled reduction process prevents over-hydrogenation. This building block facilitates creation of conductive polymers with tailored bandgap properties for flexible display technologies.