CAS 491-78-1 appears in our catalog under these names: 5-Hydroxyflavone/ 99.21% (existing batch purity), 5–Hydroxyflavone, 5-Hydroxyflavone, 97% , 5-Hydroxyflavone, 5-Hydroxyflavone, >98.0%(HPLC)(T). Offered by: TargetMol, GLPBio, Thermo Scientific (Alfa Aesar), Biosynth, TCI. Available pack sizes: 25mg, 100mg, 500mg, 1g, 10g, 250mg, 5g, 50mg.