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

CAS Number
Na salt: 1315629-79-8 ; Base:873950-18-6
CAS Number
1105067-87-5(Ca Salt); 1371615-56-3(Na Salt); 887196-24-9(Freebase)
CAS Number
887196-25-0(ca salt); 887324-52-9 (Free Acid)
CAS Number
1105067-88-6(ca salt);1428118-38-0(Na Salt);501121-34-2(Freebase)
CAS Number
83881-46-3 (base)
Alternate CAS Number
83881-48-5 (2HCl)
CAS Number
120202-69-9
Alternate CAS Number
120202-71-3(Salt)
CAS Number
20619-12-9(free base)
Alternate CAS Number
22630-25-7(Maleate Salt)
CAS Number
93413-79-7(Salt)
Alternate CAS Number
93413-57-1(Freebase)
CAS Number
113994-41-5 (Free base)