Impurities are undesirable chemical components that remain in the active pharmaceutical ingredient during formulation. Impurities may reduce a product's efficacy.

CAS Number
100-69-6
Alternate CAS Number
2479-59-6(HCl Salt)
CAS Number
103-74-2
Alternate CAS Number
101948-60-1(HCl Salt)
CAS Number
911-45-5
Alternate CAS Number
Clomifene STD - 50-41-9(Citrate salt)
CAS Number
70359-46-5
Alternate CAS Number
59803-98-4(Freebase)