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

CAS Number
2831955-36-1(free base)
Alternate CAS Number
2857180-11-9 (HBr salt)
CAS Number
127792-23-8
Alternate CAS Number
127792-45-4(Na Salt)
CAS Number
15307-86-5
Alternate CAS Number
15307-81-0(K Salt); 15307-79-6(Na Salt)
CAS Number
484-23-1
Alternate CAS Number
7327-87-9 (Sulfate)