Impurities

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

Atorvastatin Epoxy Tetrahydrofuran Analog

Atorvastatin Epoxy Tetrahydrofuran Analog

CAS Number

873950-19-7

Atorvastatin Epoxy Pyrroloxazine 7 Hydroxy Analog

Atorvastatin 7 Hydroxy Analog

CAS Number

Na salt: 1315629-79-8 ; Base:873950-18-6

Atorvastatin Diamino Impurity

Atorvastatin Diamino Impurity

CAS Number

1116118-82-1

Atorvastatin EP Impurity-F

Atorvastatin EP Impurity-F

CAS Number

1105067-87-5(Ca Salt); 1371615-56-3(Na Salt); 887196-24-9(Freebase)

Atorvastatin Related Compound H

Atorvastatin Related Compound -H

CAS Number

125995-03-1

Atorvastatin Pyrrolidone Lactone

Atorvastatin Pyrrolidone Lactone

CAS Number

906552-19-0

Atorvastatin Related Compound B

Atorvastatin Related Compound - B

CAS Number

887196-25-0(ca salt); 887324-52-9 (Free Acid)

Atorvastatin Related Compound E

Atorvastatin Related Compound - E

CAS Number

1105067-88-6(ca salt);1428118-38-0(Na Salt);501121-34-2(Freebase)

Atrovastatin Calcium Standard

Atorvastatin Calcium Standard

CAS Number

344423-98-9

Atrovastatin Related Compound-C

Atorvastatin Related Compound-C

CAS Number

693793-53-2

Allopurinol EP Impurity A

Allopurinol EP Impurity - A

CAS Number

5334-31-6

Cetirizine Methyl Ester (USP)

Cetirizine Methyl Ester

CAS Number

83881-46-3 (base)

Alternate CAS Number

83881-48-5 (2HCl)

Cetirizine Ethyl Ester (USP RC A)

Cetirizine Ethyl Ester

CAS Number

246870-46-2

120202-69-9

Clopidogrel Related Compound-C

CAS Number

120202-69-9

Alternate CAS Number

120202-71-3(Salt)

Clopidogrel Acid N-Oxide

Clopidogrel Acid N-Oxide

CAS Number

1319197-73-3

Clopidogrel Amide

Clopidogrel Amide

CAS Number

444728-13-6

Buspirone EP Impurity-A

Buspirone EP Impurity-A

CAS Number

20980-22-7

Buspirone EP Impurity-B

Buspirone EP Impurity-B

CAS Number

81461-73-6

Buspirone EP Impurity-C

Buspirone EP Impurity-C

CAS Number

257877-45-5

Buspirone EP Impurity-E

Buspirone EP Impurity-E

CAS Number

257877-43-3

Buspirone EP Impurity-G

Buspirone EP Impurity-G

CAS Number

84746-24-7

Ciprofloxacin Reference Standard

Ciprofloxacin Reference Standard (Free base)

CAS Number

85721-33-1

chlorpheniramine EP Impurity - C

Chlorpheniramine EP Impurity - C

CAS Number

20619-12-9(free base)

Alternate CAS Number

22630-25-7(Maleate Salt)

Mycophenolate Mofetil Standard

Mycophenolate Mofetil Standard

CAS Number

128794-94-5

Venlafaxine EP Impurity F

Venlafaxine EP Impurity - F

CAS Number

93413-79-7(Salt)

Alternate CAS Number

93413-57-1(Freebase)

Cetirizine EP Impurity C

Cetirizine EP Impurity - C

CAS Number

83881-59-8

Ambrisentan Decarboxylate Impurity

Ambrisentan Decarboxylate Impurity

CAS Number

1639429-81-4

Benazepril Related Compound-F

Benazepril Related Compound-F

CAS Number

109010-60-8

Bilastine Oxazoline impurity

Bilastine Oxazoline impurity

CAS Number

202189-77-3

Buspirone EP Impurity-D

Buspirone EP Impurity-D

CAS Number

2724726-67-2

Buspirone EP Impurity-H

Buspirone EP Impurity-H

CAS Number

2708578-34-9

Buspirone EP Impurity-I

Buspirone EP Impurity-I

CAS Number

2725354-99-2

Buspirone EP Impurity-J

Buspirone EP Impurity-J

CAS Number

2726492-72-2

Buspirone EP Impurity-K

Buspirone EP Impurity-K

CAS Number

1075-89-4

Buspirone EP Impurity-L

Buspirone EP Impurity-L

CAS Number

21098-11-3

Buspirone EP Impurity-N

Buspirone EP Impurity-N

CAS Number

257877-44-4

Amlodipine Impurity D

Amlodipine Impurity - D

CAS Number

113994-41-5 (Free base)

Allopurinol Related Compound - F

Allopurinol Related Compound - F

CAS Number

321571-07-7

1841081-72-8

1-(2-Ethoxyethyl)-2-(piperidin-4-yl)-1H-benzo[d]imidazole hydrochloride

CAS Number

1841081-72-8

317595-60-1

Ethyl 4-(1H-benzo[d]imidazol-2-yl)piperidine-1-carboxylate

CAS Number

317595-60-1

C17H23N3O2

Tert-butyl 4-(1H-benzo[d]imidazol-2-yl)piperidine-1-carboxylate

CAS Number

953071-73-3

1181267-36-6

Tert-butyl 4-(1-(2-ethoxyethyl)-1H-benzo[d]imidazol-2-yl)piperidine-1-carboxylate

CAS Number

1181267-36-6

Bupropion Nitroso Impurity

Bupropion Nitroso Impurity

CAS Number

2763780-10-3

Bupropion Dione impurity

Bupropion Dione impurity

CAS Number

10557-17-2

936-59-4

3-Chloro-1-phenylpropan-1-one

CAS Number

936-59-4

87427-61-0

2-Bromo-1-(3,4-dichlorophenyl)propan-1-one

CAS Number

87427-61-0

76650-08-3

2-Bromo-1-(3-bromophenyl)propan-1-one

CAS Number

76650-08-3

C9H11Cl2NO

2-Amino-1-(3-chloro phenyl)propan-1-one hydrochloride

CAS Number

2227990-16-9

Alternate CAS Number

119802-69-6(Freebase)