CAS 31721-94-5 appears in our catalog under these names: 5,7–dihydroxychromone, 5,7-Dihydroxychromone/ 98%, 5,7-Dihydroxy-4H-chromen-4-one, 5,7-dihydroxychromone, 97%, 97%, 5,7-Dihydroxychromone (Standard). Offered by: GLPBio, TargetMol, Biosynth, Chemat, MedChemExpress. Available pack sizes: 20mg, 10mM (in 1ml dmso), 1mg, 5mg, 10mg, 25mg, 50mg, 100mg.