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

CAS Number
490-79-9(freebase)
Alternate CAS Number
4955-90-2(Salt)
CAS Number
24219-97-4
Alternate CAS Number
21535-47-7(HCl Salt)
CAS Number
1154949-80-0
Alternate CAS Number
1581285-28-0(HCl Salt)