CAS 643-79-8 appears in our catalog under these names: O-Phthalaldehyde, 97%, o-Phthalaldehyde, o-Phthalaldehyde, >95% (GC), Phthaldialdehyde, 98% , o-Phthaldialdehyde, 97.50%. Offered by: Combi-blocks, Chemat Brand, TRC, Thermo Scientific (Alfa Aesar), Chemat. Available pack sizes: 5g, 100g, 500g, 25g, on request, 1g, 10g, 50g.