CAS 5434-21-9 appears in our catalog under these names: Pomalidomide Impurity 28, 4–Amino–1,2–benzenedicarboxylic acid, 4-Aminophthalic acid, 98% , 4-Aminophthalic acid, 4-Aminophthalic Acid, >95.0%(T). Offered by: Chemat Brand, GLPBio, Thermo Scientific (Alfa Aesar), Biosynth, TCI. Available pack sizes: on request, 100g, 1g, 5g, 0,5kg, 0,25kg, 25g, 1kg.