CAS 65-49-6 appears in our catalog under these names: Mesalazine EP Impurity E, Mesalazine (Mesalamine) EP Impurity E, 4-Aminosalicylic Acid, >95% (HPLC), 4-Aminosalicylic acid, 4-Aminosalicylic acid/ 97.07% (existing batch purity). Offered by: Chemat Brand, TRC, Dr. Ehrenstorfer, TargetMol, GLPBio. Available pack sizes: on request, 10g, 1g, 5g, 100mg, 500mg, 100g, 500g.