mesalazine and its Impurities
Chemically, it is 5-aminosalicylic acid and an anti-inflammatory drug. Mesalazine is an active metabolite of sulfasalazine which is used to treat inflammatory bowel disease. It is taken orally or as a rectal suppository. Reference standards of Mesalazine API,and its pharmacopeial, non pharmacopeial impurities, and stable isotopes are listed below.


5,5'-((2-Amino-5-hydroxycyclohexa-2,5-diene-1,4-diylidene)bis(azaneylylidene))bis(2-hydroxybenzoic Acid)
5,5'-((2-Amino-5-hydroxycyclohexa-2,5-diene-1,4-diylidene)bis(azaneylylidene))bis(2-hydroxybenzoic Acid)
Catalogue No.:PA 13 0231018
CAS :
147396-05-2
Molecular Formula : C20H15N3O7
Molecular Weight : 409.35


5,5'-((2,5-Dihydroxycyclohexa-2,5-diene-1,4-diylidene)bis(azaneylylidene))bis(2-hydroxybenzoic Acid)
5,5'-((2,5-Dihydroxycyclohexa-2,5-diene-1,4-diylidene)bis(azaneylylidene))bis(2-hydroxybenzoic Acid)
Catalogue No.:PA 13 0231019
CAS :
147396-06-3
Molecular Formula : C20H14N2O8
Molecular Weight : 410.34


5,5'-((2-((3-Carboxy-4-hydroxyphenyl)amino)-5-hydroxycyclohexa-2,5-diene-1,4-diylidene)bis(azaneylylidene))bis(2-hydroxybenzoic Acid)
5,5'-((2-((3-Carboxy-4-hydroxyphenyl)amino)-5-hydroxycyclohexa-2,5-diene-1,4-diylidene)bis(azaneylylidene))bis(2-hydroxybenzoic Acid)
Catalogue No.:PA 13 0231020
CAS :
147419-92-9
Molecular Formula : C27H19N3O10
Molecular Weight : 545.46