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

CAS Number
1008531-60-9(HCl Salt); 1428331-96-7 (hydrate) ; 2389989-55-1 (2HCl salt)
CAS Number
1789703-37-2(Free base)
Alternate CAS Number
2663700-61-4(HCl Salt)
CAS Number
1429908-35-9(free base)
Alternate CAS Number
2228086-73-3(HBr Salt)