CAS 596-01-0 appears in our catalog under these names: 3,3–Bis(4–hydroxynaphthalen–1–yl)isobenzofuran–1(3H)–one, alpha-Naphtholphthalein , alpha-Naphtholphthalein, >98.0%(HPLC), alpha-Naphtholphthalein, alpha-Naphtholphthalein, pure, indicator. Offered by: GLPBio, Thermo Scientific (Alfa Aesar), TCI, Chemat, Thermo Scientific (Acros). Available pack sizes: 5g, 1g, 25g, 10g, 100g, 1 g, 50 mg, 100 mg.