Impurities

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

Levonorgestrel EP Impurity G

Levonorgestrel EP Impurity G

CAS Number

87585-03-3

Levonorgestrel EP Impurity D

Levonorgestrel EP Impurity D

CAS Number

32419-58-2

Levonorgestrel EP Impurity C

Levonorgestrel EP Impurity C

CAS Number

1337972-89-0

1449029-77-9

Azilsartan Amidoxime

CAS Number

1449029-77-9

1442400-68-1

O-Desethyl Azilsartan

CAS Number

1442400-68-1

1514933-19-7

Azilsartan imidazole carbonyl dioxolene ester

CAS Number

1514933-19-7

444577-70-2

4-Methyl-3-oxo-2-(2-oxo-1,2-diphenylethyl)-N-phenylpentanamide

CAS Number

444577-70-2

141942-85-0

Ethyl (R)-(-)-4-Cyano-3-hydroxybutyrate

CAS Number

141942-85-0

2-chloro-1-(4-fluorophenyl)-2-phenylethan-1-one

2-chloro-1-(4-fluorophenyl)-2-phenylethan-1-one

CAS Number

62148-67-8

(3R,5S)-Atorvastatin

(3R,5S)-Atorvastatin

CAS Number

651770-09-1(free base); 1312366-79-2 (Ca salt); 131275-93-9 (Na salt)

(3R,5R)-Atorvastatin Amide

(3R,5R)-Atorvastatin Amide

CAS Number

2125501-02-0

Slide_1

Atorvastatin Calcium Hydrate API

CAS Number

357164-38-6

134523-01-6

Atorvastatin Sodium

CAS Number

134523-01-6

845533-86-0

Bedaquiline Fumarate

CAS Number

845533-86-0

Alternate CAS Number

843663-66-1(free base)

Bedaquiline fumarate

2122862-01-3

Bedaquiline Des-Bromo Impurity

CAS Number

2122862-01-3

Bedaquiline fumarate

654655-69-3

Bedaquiline Impurity 5

CAS Number

654655-69-3

Bedaquiline fumarate

Bedaquiline Impurity 10

Bedaquiline Impurity 10

CAS Number

NA

Bedaquiline fumarate

slide.1

Zolpidem Impurity A

CAS Number

1346600-85-8

slide.1

Ziprasidone EP Impurity B

CAS Number

1159977-56-6

N-(1-(Benzo[b]thiophen-2-yl)ethyl)hydroxylamine

N-(1-(Benzo[b]thiophen-2-yl)ethyl)hydroxylamine

CAS Number

118564-89-9

Alternate CAS Number

NA

(E)-1-(Benzo[b]thiophen-2-yl)ethanone Oxime

(E)-1-(Benzo[b]thiophen-2-yl)ethanone Oxime

CAS Number

147396-07-4

Alternate CAS Number

NA

1-(Benzo[b]thien-2-yl)ethanol

1-(Benzo[b]thien-2-yl)ethanol

CAS Number

51868-95-2

Alternate CAS Number

NA

Zileuton Related Compound C

Zileuton Related Compound C

CAS Number

22720-75-8

Zileuton EP Impurity A

Zileuton EP Impurity A

CAS Number

171370-49-3

N-Nitroso Lisinopril EP Impurity J

N-Nitroso Lisinopril EP Impurity J

CAS Number

NA

Nitrosamine Impurities

N-Nitroso Lisinopril EP Impurity J

N-Nitroso Lisinopril EP Impurity G

CAS Number

NA

Nitrosamine Impurities

N-Nitroso Lisinopril EP Impurity I

N-Nitroso Lisinopril EP Impurity I

CAS Number

NA

Nitrosamine Impurities

N-Nitroso Lisinopril EP Impurity F

N-Nitroso Lisinopril EP Impurity F

CAS Number

NA

Nitrosamine Impurities

Slide 1.GIF

Valaciclovir Impurity-D

CAS Number

1346747-69-0

519175-80-5

Lisinopril Nitroso Impurity

CAS Number

519175-80-5

Nitrosamine Impurities

Valaciclovir Hydrochloride Dihydrate

Valaciclovir Hydrochloride Dihydrate standard

CAS Number

502421-45-6

328055-92-1

Varenicline N-methyl Impurity

CAS Number

328055-92-1

796865-82-2

N-Formyl Varenicline

CAS Number

796865-82-2

2803960-64-5

3-Nitroso-2,3,4,5-tetrahydro-1H-1,5-methanobenzo[d]azepine-7,8-diamine

CAS Number

2803960-64-5

Nitrosamine Impurities

2755871-02-2

8-Nitroso-7,8,9,10-tetrahydro-6H-6,10-methanoazepino[4,5-g]quinoxaline

CAS Number

2755871-02-2

207557-35-5

Vildagliptin Chloroacetyl Nitrile (S)-Isomer

CAS Number

207557-35-5

741657-02-3

Vildagliptin Deshydroxy impurity

CAS Number

741657-02-3

565453-39-6

Vildagliptin Amide Impurity

CAS Number

565453-39-6

1789703-37-2

Vildagliptin Imine Impurity

CAS Number

1789703-37-2

Alternate CAS Number

2663700-61-4(HCl Salt)

79108-51-3

(S)-1-Nitrosopyrrolidine-2-carboxamide

CAS Number

79108-51-3

Nitrosamine Impurities

Bilastine Oxazoline impurity

Bilastine Oxazoline impurity

CAS Number

202189-77-3

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

110963-63-8

1-(2-Ethoxy-ethyl)-2-piperidin-4-yl-1H-benzimidazole

CAS Number

110963-63-8

Alternate CAS Number

1841081-72-8(HCl Salt);NA(HCl Sesquihydrate salt)

1638785-17-7

4-(2-Chloroethyl)-N-methoxy-N,α,α-trimethyl-benzeneacetamide

CAS Number

1638785-17-7

1638785-18-8

2-(4-(2-(4-(1-(2-Ethoxyethyl)-1H-benzo[d]imidazol-2-yl)piperidin-1-yl)ethyl)phenyl)-N-methoxy-N,2-dimethylpropanamide

CAS Number

1638785-18-8