CAS 81-32-3 appears in our catalog under these names: Perylene-3,4,9,10-tetracarboxylic acid, 95%, Perylene–3,4,9,10–tetracarboxylic acid, Perylene-3,4,9,10-tetracarboxylic acid, 3,4,9,10-Perylenetetracarboxylicacid, 97%, 97%, Perylene-3,4,9,10-tetracarboxylic acid, 97%. Offered by: Combi-blocks, GLPBio, Biosynth, Chemat, Fluorochem. Available pack sizes: 25g, 5g, 1g, 10g, 50g, 100g, 250mg.