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Pharmaceutical Reference Standards

USP - United States Pharmacopeia Pharmaceutical Analytical Impurities

1443 products found

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USP-1A01090

Monoiodoamiodarone ((2-Butylbenzofuran-3-yl){4-[2-(diethylamino)ethoxy]-3-iodophenyl}methanone)

Item no.

USP-1A01090

CAS Number

[85642-08-6]

Unit

50 mg

Molecular formula

C25H30INO3

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USP-1A02450

2-Dechloro Aripiprazole (7-(4-(4-(3-chlorophenyl)piperazin-1-yl)butoxy)-3,4-dihydroquinolin-2(1H)-one)

Item no.

USP-1A02450

CAS Number

[203395-82-8]

Unit

25 mg

Molecular formula

C23H28ClN3O2

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USP-1A02570

3-Dechloro Aripiprazole (7-(4-(4-(2-chlorophenyl)piperazin-1-yl)butoxy)-3,4-dihydroquinolin-2(1H)-one)

Item no.

USP-1A02570

CAS Number

[203395-81-7]

Unit

25 mg

Molecular formula

C23H28ClN3O2

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USP-1A03510

7-Keto abiraterone Acetate

Item no.

USP-1A03510

CAS Number

[2410075-48-6]

Unit

25 mg

Molecular formula

C26H31NO3

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USP-1A06330

7,8-Dihydrofolic Acid ((4-(((2-amino-4-oxo-3,4,7,8-tetrahydropteridin-6-yl)methyl)amino)benzoyl)-L-glutamic acid)

Item no.

USP-1A06330

CAS Number

[4033-27-6]

Unit

25 mg

Molecular formula

C19H21N7O6

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USP-1A06590

Phenothiazine sulfoxide (5-Oxophenothiazine)

Item no.

USP-1A06590

CAS Number

[1207-71-2]

Unit

25 mg

Molecular formula

C12H9NOS

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USP-1A08560

Chloromethyl Olanzapinium Chloride (1-Chloromethyl-1-methyl-4-(2-methyl-10H-benzo[b]thieno[2,3-e][1,4]diazepin-4-yl)piperazin-1-ium chloride)

Item no.

USP-1A08560

CAS Number

[719300-59-1]

Unit

25 mg

Molecular formula

C18H22Cl2N4S

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USP-1A08960

N-Nitroso N-Desmethyl Tamoxifen Solution (1 mg/mL in Methanol) ((Z)-N-(2-(4-(1,2-diphenylbut-1-en-1-yl)phenoxy)ethyl)-N-methylnitrous amide)

Item no.

USP-1A08960

Unit

1 mL

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USP-1A08990

N-Nitroso N-Desmethyl Tetracaine Solution (1 mg/mL in Acetonitrile) (2-(methyl(nitroso)amino)ethyl 4-(butylamino)benzoate)

Item no.

USP-1A08990

Unit

1 mL

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USP-1A09010

N-Nitroso N-Desmethyl Trimethobenzamide Solution (1 mg/mL in Methanol) (3,4,5-trimethoxy-N-(4-(2-(methyl(nitroso)amino)ethoxy)benzyl)benzamide)

Item no.

USP-1A09010

Unit

1 mL

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USP-1A09020

N-Nitroso N-Desmethyl Venlafaxine Solution (1 mg/mL in Methanol) (N-[2-(1-Hydroxycyclohexyl)-2-(4-methoxyphenyl)ethyl]-N-methylnitrous amide)

Item no.

USP-1A09020

Unit

1 mL

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USP-1A09630

N-Nitroso N-Ethyl Valacyclovir Solution (1 mg/mL in Methanol) (2-((2-amino-6-oxo-1,6-dihydro-9H-purin-9-yl)methoxy)ethyl N-ethyl-N-nitroso-L-valinate)

Item no.

USP-1A09630

Unit

1 mL

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USP-1A09830

N-Nitroso Desmethyl (E)-Doxepin Solution (1 mg/mL in Acetonitrile) ((E)-N-[3-(Dibenzo[b,e]oxepin-11(6H)-ylidene)propyl]-N-methylnitrous amide)

Item no.

USP-1A09830

Unit

1 mL

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USP-1A09890

N-Nitroso Lorcaserin Solution (1 mg/mL in Methanol) ((1R)-8-chloro-2,3,4,5-tetrahydro-1-methyl-3-nitroso-1H-3-benzazepine)

Item no.

USP-1A09890

Unit

1 mL

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USP-1A11190

3-O-Allyl Naloxone CII (4,5alpha-Epoxy-14-hydroxy-17-(prop-2-enyl)-3-(prop-2-enyloxy)morphinan-6-one) (CONTROLLED IN USA)

Item no.

USP-1A11190

Unit

25 mg

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USP-1A11240

Tert-butyl 4-nitrosopiperazine-1-carboxylate (tert-Butyl 4-nitrosopiperazine-1-carboxylate)

Item no.

USP-1A11240

Unit

5 mg

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USP-1A11550

Chlorthalidone Sulfonic Acid (2-(4-Chloro-3-sulfobenzoyl)benzoic acid)

Item no.

USP-1A11550

Unit

25 mg

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USP-1A11810

11Beta-Hydroxyboldione (11Beta-Hydroxyandrosta-1,4-diene-3,17-dione)

Item no.

USP-1A11810

Unit

25 mg

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USP-1A12130

Desbenzonitrile (S,S)-Isavuconazole ((2S,3S)-3-(2,5-difluorophenyl)-3-hydroxy-2-methyl-4-(1H-1,2,4-triazol-1-yl)butanethioamide)

Item no.

USP-1A12130

Unit

25 mg

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USP-1A12200

2,3,6-Trifluoro Sitagliptin Phosphate (3-amino-1-(3-(trifluoromethyl)-5,6-dihydro-[1,2,4]triazolo[4,3-a]pyrazin-7(8H)-yl)-4-(2,3,6-trifluorophenyl)butan-1-one phosphate)

Item no.

USP-1A12200

Unit

25 mg

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USP-1A12260

5-Nitroso-4,5,6,7-tetrahydrothiazolo[5,4-c]pyridine-2-carboxylic Acid (5-nitroso-4,5,6,7-tetrahydrothiazolo[5,4-c]pyridine-2-carboxylic acid)

Item no.

USP-1A12260

Unit

25 mg

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USP-1A12850

N-Nitroso Vonoprazan (N-[[5-(2-fluorophenyl)-1-pyridin-3-ylsulfonylpyrrol-3-yl]methyl]-N-methylnitrous amide)

Item no.

USP-1A12850

Unit

10 mg

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USP-1A12980

Benzopyrene (Benzo[a]pyrene)

Item no.

USP-1A12980

Unit

25 mg

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USP-1A13930

4-Methyl Estradiol (4-Methylestra-1,3,5(10)-trien-3,17beta-diol)

Item no.

USP-1A13930

Unit

25 mg

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USP-1A14070

Mesalamine Sulfonic Acid Hydrobromide (5-Amino-2-hydroxy-4'-sulfo-[1,1'-biphenyl]-3-carboxylic acid hydrobromide)

Item no.

USP-1A14070

Unit

25 mg

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USP-1A14410

Thiothiamine (3-((4-Amino-2-methylpyrimidin-5-yl)methyl)-5-(2-hydroxyethyl)-4-methylthiazole-2(3H)-thione)

Item no.

USP-1A14410

Unit

25 mg

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USP-1A15620

Tofacitinib Dimer (1,3-Bis{(3R,4R)-4-methyl-3-[methyl(7H-pyrrolo[2,3-d]pyrimidin-4-yl)amino]-1-piperidinyl}-1,3-propanedione)

Item no.

USP-1A15620

Unit

25 mg

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USP-1A15920

N-Nitroso Debutyl Bupivacaine (N-(2,6-dimethylphenyl)-1-nitrosopiperidine-2-carboxamide)

Item no.

USP-1A15920

Unit

5 mg

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USP-1A16060

N-Nitroso Demethyl Clarithromycin

Item no.

USP-1A16060

Unit

5 mg

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USP-1A16160

Lansoprazole Sulfone N-Oxide (2-{[(1H-benzo[d]imidazol-2-yl)sulfonyl]methyl}-3-methyl-4-(2,2,2-trifluoroethoxy)pyridine 1-oxide)

Item no.

USP-1A16160

Unit

25 mg

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USP-1A17260

Alectinib Desmorpholino Acid (6-Cyano-2-[2-(4-ethylphenyl)propan-2-yl]-1H-indole-3-carboxylic acid)

Item no.

USP-1A17260

Unit

25 mg

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USP-1A17430

Momelotinib Open Ring Alchohol (N-(cyanomethyl)-4-(2-((4-((2-hydroxyethyl)amino)phenyl)amino)pyrimidin-4-yl)benzamide)

Item no.

USP-1A17430

Unit

25 mg

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USP-1A18380

Metoclopramide N-Oxide (2-(4-Amino-5-chloro-2-methoxybenzamido)-N,N-diethylethan-1-amine oxide)

Item no.

USP-1A18380

Unit

25 mg

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USP-1A18400

N-Methyl Moxifloxacin (1-Cyclopropyl-6-fluoro-8-methoxy-7-((4aS,7aS)-1-methyloctahydro-6H-pyrrolo[3,4-b]pyridin-6-yl)-4-oxo-1,4-dihydroquinoline-3-carboxylic acid)

Item no.

USP-1A18400

Unit

25 mg

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USP-1A18430

N-Nitroso Destetrazole Desacylvalsartan Nitrile (Methyl N-((2'-cyano-[1,1'-biphenyl]-4-yl)methyl)-N-nitroso-L-valinate)

Item no.

USP-1A18430

Unit

25 mg

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USP-1A18440

Descarbamoyl Cefuroxime ((6R,7R)-7-[[(2Z)-2-(Furan-2-yl)-2-methoxyiminoacetyl]amino]-3-(hydroxymethyl)-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid)

Item no.

USP-1A18440

Unit

25 mg

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USP-1A19480

Osimertinib Beta-Lactam (1-(2-((2-(Dimethylamino)ethyl)(methyl)amino)-4-methoxy-5-((4-(1-methyl-1H-indol-3-yl)pyrimidin-2-yl)amino)phenyl)azetidin-2-one)

Item no.

USP-1A19480

Unit

25 mg

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USP-1A19490

Selexipag Ethyl Ester (Ethyl 2-{4-[(5,6-diphenylpyrazin-2-yl)(propan-2-yl)amino]butoxy}acetate)

Item no.

USP-1A19490

Unit

25 mg

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USP-1A19610

Despiperazine Bosutinib (4-[(2,4-dichloro-5-methoxyphenyl)amino]-6-methoxy-7-propoxyquinoline-3-carbonitrile)

Item no.

USP-1A19610

Unit

25 mg

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USP-1A19650

Desbenzothiophene Brexpiprazole (7-[4-(1-Piperazinyl)butoxy]-2(1H)-quinolinone)

Item no.

USP-1A19650

Unit

25 mg

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USP-1A19690

Formyl Dasatinib (N-(2-Chloro-6-methylphenyl)-2-{[6-(4-formyl-1-piperazinyl)-2-methyl-4-pyrimidinyl]amino}-1,3-thiazole-5-carboxamide)

Item no.

USP-1A19690

Unit

25 mg

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USP-1A19720

Dasatinib Ethyl Carbamate (Ethyl 4-[6-({5-[(2-chloro-6-methylphenyl)carbamoyl]thiazol-2-yl}amino)-2-methylpyrimidin-4-yl]piperazine-1-carboxylate)

Item no.

USP-1A19720

Unit

25 mg

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USP-1A19740

N-Boc-N-deshydroxyethyl Dasatinib (2-Methyl-2-propanyl 4-[6-({5-[(2-chloro-6-methylphenyl)carbamoyl]-1,3-thiazol-2-yl}amino)-2-methyl-4-pyrimidinyl]-1-piperazinecarboxylate)

Item no.

USP-1A19740

Unit

25 mg

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USP-1A20120

Delta6-Ethinyl Estradiol (19-Nor-17alpha-pregna-1,3,5(10),6-tetraen-20-yne-3,17-diol)

Item no.

USP-1A20120

Unit

25 mg

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USP-1A20150

2-Methyl Ethinylestradiol (2-Methyl-19-nor-17alpha-pregna-1,3,5(10)-trien-20-yne-3,17-diol)

Item no.

USP-1A20150

Unit

25 mg

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USP-1A20250

Methoxyphenethyl Desvenlafaxine (1-{2-[(4-Methoxyphenethyl)amino]-1-(4-methoxyphenyl)ethyl}cyclohexan-1-ol)

Item no.

USP-1A20250

Unit

25 mg

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USP-1A20260

Desvenlafaxine N-Oxide (2-(1-Hydroxycyclohexyl)-2-(4-hydroxyphenyl)-N,N-dimethylethan-1-amine oxide)

Item no.

USP-1A20260

Unit

25 mg

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USP-1A20270

Apixaban Open Ring Methyl Ester (Methyl 5-((4-(3-carbamoyl-1-(4-methoxyphenyl)-7-oxo-1,4,5,7-tetrahydro-6H-pyrazolo[3,4-c]pyridin-6-yl)phenyl)amino)pentanoate)

Item no.

USP-1A20270

Unit

25 mg

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USP-1A20330

Descyano Febuxostat (2-[4-(2-Methylpropoxy)phenyl]-4-methylthiazole-5-carboxylic acid)

Item no.

USP-1A20330

Unit

25 mg

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USP-1A20360

Febuxostat Methyl Ester (Methyl 2-[3-cyano-4-(2-methylpropoxy)phenyl]-4-methylthiazole-5-carboxylate)

Item no.

USP-1A20360

Unit

25 mg

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