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

CAS Number
910297-51-7(free base); 1852573-26-2 (HCl Salt)
CAS Number
110963-63-8
Alternate CAS Number
1841081-72-8(HCl Salt);NA(HCl Sesquihydrate salt)