CAS 26725-51-9 appears in our catalog under these names: 4-Hydroxybenzotriazole, 95%, 4(7)-Hydroxybenzotriazole, >95% (HPLC), 4–Hydroxy–1H–benzotriazole, 4-Hydroxy-1H-benzotriazole, 1H-Benzo[d][1,2,3]triazol-4-ol, 98%, 98%. Offered by: Combi-blocks, TRC, GLPBio, Biosynth, Chemat. Available pack sizes: 100mg, 1g, 250mg, 10mg, 50mg, 5g, 500mg, 2000mg.