CAS 481-42-5 appears in our catalog under these names: 5-Hydroxy-2-methyl-[1,4]naphthoquinone, 98%, Plumbagin, >95% (HPLC), Plumbagin/ 99.82% (existing batch purity), Plumbagin, Plumbagin, >98.0%(HPLC)(T). Offered by: Fluorochem, TRC, TargetMol, GLPBio, Biosynth. Available pack sizes: 100mg, 250mg, 1g, 5g, 10g, 10mg, 25mg, 50mg.