Impurities

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

1-Chloroethyl Cyclohexyl Carbonate

CAS Number

99464-83-2

Candesartan Cilexetil

1-cyclohexylpiperazine

CAS Number

17766-28-8

Chemical Primary Standard

1-Cyclopropyl-6,7-dimethoxy-4-oxo-1,4-dihydroquinoline-3-carboxylic Acid

CAS Number

1267935-86-3

Ciprofloxacin

1-Cyclopropyl-8-fluoro-4-oxo-7-(piperazin-1-yl)-1,4-dihydroquinoline-3-carboxylic Acid

CAS Number

122224-30-0

Ciprofloxacin

1-Hydroxy Empagliflozin

CAS Number

1279691-35-8

Empagliflozin

1-Methoxy Empagliflozin

CAS Number

1279691-36-9

Empagliflozin

1-Methyl-3-(4-phenoxyphenyl)-1H-pyrazolo[3,4-d]pyrimidin-4-amine

CAS Number

2213398-75-3

Ibrutinib

1-Methylpiperazine

CAS Number

109-01-3

Alternate CAS Number

34352-59-5(DiHCl Salt)

Clozapine

1-Naphthol

CAS Number

90-15-3

Chemical Primary Standard

1-Trityl-1H-imidazole-5-carboxaldehyde

CAS Number

172498-90-7

Dexmedetomidine

1-[4-[(1,2,3,4-Tetrahydro-2-oxo-7-quinolinyl)oxy]butyl] Aripiprazole

CAS Number

1424857-63-5

Aripiprazole

10,11-Dihydro-10-Hydroxy Carbamazepine

CAS Number

29331-92-8

Carbamazepine

10-Acetoxycarbamazepine

CAS Number

952740-00-0

Carbamazepine

16-Dehydropregnolone

CAS Number

1162-53-4

Abiraterone

2',6'-Dichloroacetanilide

CAS Number

17700-54-8

Clonidine

2,2,14,14-Tetramethyl-8-oxopentadecanedioic acid

CAS Number

413624-71-2

Bempedoic Acid

2,2’-((Disulfanediylbis(2-methyl-4,1-phenylene))bis(oxy))diacetic acid

CAS Number

Seladelpar

2,3,4,5-Tetrahydro-1H-1,5-methanobenzo[d]azepine Hydrochloride

CAS Number

230615-52-8

Chemical Primary Standard

2,3,5,6-Tetrafluorophenol

CAS Number

769-39-1

Chemical Primary Standard

2,3-Dihydroxy-4-oxo-4-(6,7,9,10-tetrahydro-8H-6,10-methanoazepino[4,5-g]quinoxalin-8-yl)butanoic acid

CAS Number

2306217-15-0

Varenicline

2,4-Diamino-6-pteridinemethanol

CAS Number

945-24-4

Chemical Primary Standard

2,4-Difluorobenzoic Acid

CAS Number

1583-58-0

Chemical Primary Standard

2,4-Thiophenediethanol

CAS Number

Clopidogrel

2,6,8-Trimethylnon-5-en-4-one

CAS Number

19044-66-7

Clopidogrel

2,6-Dichloroaniline

CAS Number

608-31-1

Chemical Primary Standard

2,7-bis(4-Chlorobutoxy)quinoline

CAS Number

2060027-95-2

Brexpiprazole

2-(((4-Chloro-3-methoxypyridin-2-yl)methyl)thio)-6-(difluoromethoxy)-1H-benzo[d]imidazole

CAS Number

368890-20-4 (base libre)

Alternate CAS Number

1802402-61-4 (hydrate) ; 1250376-59-0 (sel HCl)

Pantoprazole

2-((2-Amino-4-chlorophenyl)amino)benzoic Acid

CAS Number

67990-66-3

Clozapine

2-((2-Aminoethoxy)methyl)-4-(2-chlorophenyl)-6-methyl-1,4-dihydropyridine-3,5-dicarboxylic Acid

CAS Number

1821498-25-2

Amlodipine

2-((2-methoxyphenoxy)methyl)-4-nitrosomorpholine

CAS Number

Nitrosamine Impurities

2-(2-(1-(4-(2-(4,4-Dimethyl-4,5-dihydrooxazol-2-yl)propan-2-yl)phenethyl)piperidin-4-yl)-1H-benzo[d]imidazol-1-yl)ethan-1-ol

CAS Number

202189-82-0

Bilastine

2-(2-(2-Fluorophenyl)-2-oxoethyl)malononitrile

CAS Number

312307-38-3

Vonoprazan

2-(2-(Piperidin-4-yl)-1H-benzo[d]imidazol-1-yl)ethan-1-ol

CAS Number

1178710-88-7

Bilastine

2-(2-Chloroethoxy)ethanol

CAS Number

628-89-7

Chemical Primary Standard

2-(2-Hydroxyethyl)pyridine

CAS Number

103-74-2

Chemical Primary Standard

2-(3,4-Dimethylphenyl)-5-methyl-2,4-dihydro-3H-pyrazol-3-one

CAS Number

18048-64-1

Chemical Primary Standard

2-(3,4-Dimethylphenyl)-5-methyl-2,4-dihydro-3H-pyrazol-3-one

CAS Number

18048-64-1

Alternate CAS Number

2360824-89-9 (HCl salt)

Eltrombopag

2-(3-Fluoro-2-methoxyphenyl)acetic Acid

CAS Number

1017778-30-1

Chemical Primary Standard

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

Bilastine

2-(4-(2-(4-(1-(4-(2-Carboxypropan-2-yl)phenethyl)-1H-benzo[d]imidazol-2-yl)piperidin-1-yl)ethyl)phenyl)-2-methylpropanoic Acid

CAS Number

2411093-91-7

Bilastine

2-(4-(2-bromoacetyl)phenyl)-2-methyl-1-(Piperidin-1-yl) propan-1-one

CAS Number

Bilastine

2-(4-(2-bromoethyl)phenyl)-2-methyl-1-(Piperidin-1-yl) propan-1-one

CAS Number

Bilastine

2-(4-(2-chloroacetyl)phenyl)-2-methyl-1-(Piperidin-1-yl) propan-1-one

CAS Number

2777117-66-3

Bilastine

2-(4-Methanesulfonyl-phenyl)-1-(6-methyl-pyridin-3-yl)-ethanone

CAS Number

221615-75-4

Chemical Primary Standard

2-(4-NITROSOPIPERAZIN-1-YL)PYRIMIDINE

CAS Number

872826-80-7

Nitrosamine Impurities

2-(4-Nitrosopiperazin-1-yl)pyrimidine

CAS Number

872826-80-7

Buspirone

2-(5-Hydroxy-6-oxo-1-(4-(2-oxopiperidin-1-yl)phenyl)-1,2,3,6-tetrahydropyridin-4-yl)-2-oxoacetic acid

CAS Number

1609409-54-2

Apixaban

2-(Adamantan-1-yl)-4-Bromophenol

CAS Number

104224-68-2

Adapalene

Impurities

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