API
IMPURITY
CHEMICAL NAME
STRUCTURE
2
Sulfacetamide Sodium

EP Impurity A

 sulfanilamide Sulfacetamide-Sodium-EP-Impurity-A
Sulfacetamide Sodium

EP Impurity B

 N-(4-sulphamoylphenyl)acetamide Sulfacetamide-Sodium-EP-Impurity-B
Sulfacetamide Sodium

EP Impurity C

 N-[[4-(acetylamino)phenyl]sulphonyl]acetamide Sulfacetamide-Sodium-EP-Impurity-C
Sulfacetamide Sodium

EP Impurity D

 dapsone.