API
IMPURITY
CHEMICAL NAME
STRUCTURE
2
Dipyrone

EP Impurity A

4-formylamino-1,5-dimethyl-2-phenyl-1,2-dihydro-3H-pyrazol-3-one DipyroneEP Impurity A
Dipyrone

EP Impurity B

4-amino-1,5-dimethyl-2-phenyl-1,2-dihydro-3H-pyrazol-3-one, DipyroneEP Impurity B
Dipyrone

EP Impurity C

4-methylamino-1,5-dimethyl-2-phenyl-1,2-dihydro-3H-pyrazol-3-one DipyroneEP Impurity C
Dipyrone

EP Impurity D

4-dimethylamino-1,5-dimethyl-2-phenyl-1,2-dihydro-3H-pyrazol-3-one DipyroneEP Impurity D
Dithranol

EP Impurity B

1,8-dihydroxyanthracene-9,10-dione (dantron), DithranolEP Impurity B