tartrazine and its Impurities
An azo dye used as a food coloring agent.Reference standards of Tartrazine API,and its pharmacopeial, non pharmacopeial impurities, and stable isotopes are listed below.
Sodium 4,4'-(5-oxo-4-(2-(4-sulfonatophenyl)hydrazineylidene)-4,5-dihydro-1H-pyrazole-1,3-diyl)dibenzenesulfonate
Sodium 4,4'-(5-oxo-4-(2-(4-sulfonatophenyl)hydrazineylidene)-4,5-dihydro-1H-pyrazole-1,3-diyl)dibenzenesulfonate
Catalogue No.:PA 47 0381002
CAS :
104236-31-9
Molecular Formula : C21H13N4Na3O10S3
Molecular Weight : 646.5
4-(2-(4',5-Disulfo-[1,1'-biphenyl]-2-yl)hydrazineylidene)-5-oxo-1-(4-sulfophenyl)-4,5-dihydro-1H-pyrazole-3-carboxylic Acid
4-(2-(4',5-Disulfo-[1,1'-biphenyl]-2-yl)hydrazineylidene)-5-oxo-1-(4-sulfophenyl)-4,5-dihydro-1H-pyrazole-3-carboxylic Acid
Catalogue No.:PA 47 0381003
CAS :
750530-77-9
Molecular Formula : C22H16N4O12S3
Molecular Weight : 624.57
4-(2-(3-(Methoxycarbonyl)-5-oxo-1-(4-sulfophenyl)-1,5-dihydro-4H-pyrazol-4-ylidene)hydrazineyl)benzenesulfonic Acid
4-(2-(3-(Methoxycarbonyl)-5-oxo-1-(4-sulfophenyl)-1,5-dihydro-4H-pyrazol-4-ylidene)hydrazineyl)benzenesulfonic Acid
Catalogue No.:PA 47 0381004
CAS :
791545-81-8
Molecular Formula : C17H14N4O9S2
Molecular Weight : 482.44
Sodium 5-oxo-1-phenyl-4-((4-sulfonatophenyl)diazenyl)-4,5-dihydro-1H-pyrazole-3-carboxylate
Sodium 5-oxo-1-phenyl-4-((4-sulfonatophenyl)diazenyl)-4,5-dihydro-1H-pyrazole-3-carboxylate
Catalogue No.:PA 47 0381005
CAS :
104236-33-1
Molecular Formula : C16H10N4Na2O6S
Molecular Weight : 432.32
Sodium 5-oxo-4-(phenyldiazenyl)-1-(4-sulfonatophenyl)-4,5-dihydro-1H-pyrazole-3-carboxylate
Sodium 5-oxo-4-(phenyldiazenyl)-1-(4-sulfonatophenyl)-4,5-dihydro-1H-pyrazole-3-carboxylate
Catalogue No.:PA 47 0381006
CAS :
1934-22-1
Molecular Formula : C16H10N4Na2O6S
Molecular Weight : 432.32
