CAS 67021-83-4 appears in our catalog under these names: 4–Hydroxybenzimidazole, 4-Hydroxybenzimidazole, >98.0%(GC)(T), 1H-Benzo[d]imidazol-4-ol 95%, 1H-Benzo[d]imidazol-4-ol, 95%, 1H-Benzo[d]imidazol-4-ol, 95%, 95%. Offered by: GLPBio, TCI, Ambeed, Fluorochem, Chemat. Available pack sizes: 1g, 250mg, 5g, 100mg, 10g.