CAS 31519-22-9 appears in our catalog under these names: 1,4–dihydroxy–2–naphthoic acid, 1,4-Dihydroxy-2-naphthoic acid, 1,4-Dihydroxy-2-naphthoic Acid, >98.0%(HPLC)(T), 1,4-Dihydroxy-2-naphthoic acid 95%, 1,4-DIHYDROXY-2-NAPHTHOIC ACID, 98%. Offered by: GLPBio, Biosynth, TCI, Ambeed, Sigma-Aldrich. Available pack sizes: 25g, 5g, 100g, 50g, 250g, 10g, 10mM/1mL, 1 g.