CAS 39123-39-2 appears in our catalog under these names: Ethyl pyridazine-4-carboxylate, 97%, Ethyl Pyridazine–4–carboxylate, Ethyl pyridazine-4-carboxylate 98%, Ethyl Pyridazine-4-carboxylate, 97%, 97%, Ethyl pyridazine-4-carboxylate. Offered by: Combi-blocks, GLPBio, Ambeed, Chemat, Fluorochem. Available pack sizes: 250mg, 5g, 1g.