CAS 54303-63-8 appears in our catalog under these names: 5-Bromo-2-hydrazino-1h-1,3-benzimidazole, 95%, 5-Bromo-2-hydrazino-1H-benzimidazole 97%, 5-Bromo-2-hydrazino-1H-benzimidazole, 95%, 95%. Offered by: Combi-blocks, Ambeed, Chemat. Available pack sizes: 250mg, 1g, 100mg.