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

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)
CAS Number
845533-86-0
Alternate CAS Number
843663-66-1(free base)