CAS 319-89-1 appears in our catalog under these names: Tetrahydroxyquinone/ 98.47% (existing batch purity), Tetrahydroxy-1,4-quinone Sesquihydrat/ 98+%, Tetrahydroxyquinone, Tetrahydroxyquinone 98+%, Tetrahydroxyquinone, 98%, 98%. Offered by: TargetMol, Chemat, Biosynth, Ambeed, MedChemExpress. Available pack sizes: 100mg, 25g, 5g, 2g, 10g, 50g, 1g, 100g.