CAS 52481-66-0 appears in our catalog under these names: Ethyl 2-hydrazino-4-methyl-1,3-thiazole-5-carboxylate hydrochloride, 95%, Ethyl 2-hydrazinyl-4-methylthiazole-5-carboxylate, 95+%. Offered by: Combi-blocks, AmBeed. Available pack sizes: 250mg, 1g, 5g.