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

CAS Number
29676-71-9
Alternate CAS Number
66659-20-9 (HCl salt) ; 142415-66-5 (Sodium salt) ; 112097-91-3 (potassium salt)
CAS Number
903565-83-3
Alternate CAS Number
NA
CAS Number
2831955-36-1(free base)
Alternate CAS Number
2857180-11-9 (HBr salt)
CAS Number
2725536-50-3 (free base)
Alternate CAS Number
2725536-51-4 (HBr salt)
CAS Number
1855920-54-5
Alternate CAS Number
NA
CAS Number
527-72-0
Alternate CAS Number
25112-68-9 (Na salt) ; 33311-43-2 (K salt) ; 150898-93-4 (HCl salt)
CAS Number
2437650-74-1(HCI)
Alternate CAS Number
1082588-73-5 (Free base)