CAS 20443-38-3 appears in our catalog under these names: 5-Chloro-2-(chloromethyl)-1h-benzimidazole, 95%, 6–Chloro–2–(chloromethyl)–1H–benzo(d)imidazole, 6-Chloro-2-(chloromethyl)-1H-benzo[d]imidazole 93%, 5-Chloro-2-(chloromethyl)-1H-benzimidazole, 95%, 95%. Offered by: Combi-blocks, GLPBio, Ambeed, Chemat. Available pack sizes: 1g, 5g, 100mg, 250mg.