balsalazide and its Impurities
Balsalazide is an anti-inflammatory drug, which is prepared from 4-aminohippuric acid. It releases mesalazine or 5-aminosalicylic acid, in the large intestine. Reference standards of Balsalazide API, and its pharmacopeial, non pharmacopeial impurities, and stable isotopes are listed below.


Balsalazide Related Compound A ((E)-5-[(p-carboxyphenyl)azo]-2-salicylic acid, disodium salt) (1048266)
Balsalazide Related Compound A ((E)-5-[(p-carboxyphenyl)azo]-2-salicylic acid, disodium salt) (1048266)
Catalogue No.:PA USP1048266
CAS :
1242567-07-2
Molecular Formula : NA
Molecular Weight : NA


Balsalazide Related Compound B ((E)-5-((m-[(2-carboxyethyl)carbamoyl]phenyl)azo)-2-salicylic acid) (1048277)
Balsalazide Related Compound B ((E)-5-((m-[(2-carboxyethyl)carbamoyl]phenyl)azo)-2-salicylic acid) (1048277)
Catalogue No.:PA USP1048277
CAS :
NA
Molecular Formula : NA
Molecular Weight : NA


(E)-4-((2-Carboxyethyl)carbamoyl)-2-((4-((2-carboxyethyl)carbamoyl)phenyl)diazenyl)benzenediazonium Chloride
(E)-4-((2-Carboxyethyl)carbamoyl)-2-((4-((2-carboxyethyl)carbamoyl)phenyl)diazenyl)benzenediazonium Chloride
Catalogue No.:PA 02 03610
CAS :
NA
Molecular Formula : C20H19ClN6O6
Molecular Weight : 474.86


3-((E)-(4-((2-Carboxyethyl)carbamoyl)-2-((E)-(4-((2-carboxyethyl)carbamoyl)phenyl)diazenyl)phenyl)diazenyl)-5-hydroxybenzoic Acid
3-((E)-(4-((2-Carboxyethyl)carbamoyl)-2-((E)-(4-((2-carboxyethyl)carbamoyl)phenyl)diazenyl)phenyl)diazenyl)-5-hydroxybenzoic Acid
Catalogue No.:PA 02 03620
CAS :
NA
Molecular Formula : C27H24N6O9
Molecular Weight : 576.52


3-((E)-(4-((2-Carboxyethyl)carbamoyl)-2-((E)-(4-((2-carboxyethyl)carbamoyl)phenyl)diazenyl)phenyl)diazenyl)-4-hydroxybenzoic Acid
3-((E)-(4-((2-Carboxyethyl)carbamoyl)-2-((E)-(4-((2-carboxyethyl)carbamoyl)phenyl)diazenyl)phenyl)diazenyl)-4-hydroxybenzoic Acid
Catalogue No.:PA 02 03630
CAS :
NA
Molecular Formula : C27H24N6O9
Molecular Weight : 576.52


3,3'-((4,4'-((1E,1'E)-(4-Hydroxy-1,3-phenylene)bis(diazene-2,1-diyl))bis(benzoyl))bis(azanediyl))dipropionic Acid
3,3'-((4,4'-((1E,1'E)-(4-Hydroxy-1,3-phenylene)bis(diazene-2,1-diyl))bis(benzoyl))bis(azanediyl))dipropionic Acid
Catalogue No.:PA 02 0021005
CAS :
1242567-13-0
Molecular Formula : C26H24N6O7
Molecular Weight : 532.51


(E)-5-((4-((3-((2-Carboxyethyl)amino)-3-oxopropyl)carbamoyl)phenyl)diazenyl)-2-hydroxybenzoic Acid
(E)-5-((4-((3-((2-Carboxyethyl)amino)-3-oxopropyl)carbamoyl)phenyl)diazenyl)-2-hydroxybenzoic Acid
Catalogue No.:PA 02 0021006
CAS :
1242567-08-3
Molecular Formula : C20H20N4O7
Molecular Weight : 428.4