CAS 83511-07-3 appears in our catalog under these names: 3,7-Dihydroxy-2-naphthoic Acid, >90.0%(HPLC), 3,7-Dihydroxy-2-naphthoic acid 95%, 3,7-DIHYDROXY-2-NAPHTHOIC ACID, &, 3,7-dihydroxy-2-naphthoic acid, 95%, 95%, 3,7-Dihydroxy-2-naphthoic acid, 95%. Offered by: TCI, Ambeed, Sigma-Aldrich, Chemat, Fluorochem. Available pack sizes: 5g, 1g, 250mg.