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Pharmaceutical Reference Standards

USP - United States Pharmacopeia Pharmaceutical Analytical Impurities

1527 products found

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USP-1A00720

Desiodoamiodarone ((2-butylbenzofuran-3-yl)(4-(2-(diethylamino)ethoxy)phenyl)methanone)

Item no.

USP-1A00720

CAS Number

[23551-25-9]

Unit

25 mg

Molecular formula

C25H31NO3

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USP-1A00990

Decarboxy Moxifloxacin (1-Cyclopropyl-6-fluoro-8-methoxy-7-[(4aS,7aS)-octahydro-6H-pyrrolo[3,4-b]pyridin-6-yl]-4-oxo-1,4-dihydroquinoline) (COLD SHIPMENT REQUIRED)

Item no.

USP-1A00990

CAS Number

[1322062-57-6]

Unit

25 mg

Molecular formula

C20H24FN3O2

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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-1A03250

Monochlorotriiodothyronine ((S)-2-Amino-3-[3-chloro-4-(4-hydroxy-3,5-diiodophenoxy)-5-iodophenyl]propanoic acid)

Item no.

USP-1A03250

CAS Number

[909279-46-5]

Unit

25 mg

Molecular formula

C15H11ClI3NO4

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USP-1A03950

N-Nitrosopiperidine Solution (1 mg/mL in Methanol) (1-Nitrosopiperidine)

Item no.

USP-1A03950

CAS Number

[100-75-4]

Unit

1 mL

Molecular formula

C5H10N2O

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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-1A06720

Chlorhexidine Nitrile Trifluoroacetate (1-(4-Chlorophenyl)-5-[6-[(cyanocarbamimidoyl)amino]hexyl]biguanide trifluoroacetate)

Item no.

USP-1A06720

Unit

25 mg

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USP-1A07150

Rosuvastatin Sodium Benzoquinazoline Analog (Sodium (3R,5S)-5-((S)-8-fluoro-4-isopropyl-2-(N-methylmethylsulfonamido)-5,6-dihydrobenzo[h]quinazolin-6-yl)-3,5-dihydroxypentanoate)

Item no.

USP-1A07150

CAS Number

[n/a]

Unit

25 mg

Molecular formula

C22H27FN3NaO6S

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USP-1A07890

Rosuvastatin Sodium Dehydro Analog (COLD SHIPMENT REQUIRED) ((S,2E,6E)-7-[4-(4-Fluorophenyl)-6-isopropyl-2-(N-methylmethylsulfonamido) pyrimidin-5-yl]-5-hydroxyhepta-2,6-dienoic acid Sodium salt)

Item no.

USP-1A07890

CAS Number

[n/a]

Unit

10 mg

Molecular formula

C22H25FN3NaO5S

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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-1A09030

N-Nitroso N-Desmethyl Zolmitriptan Solution (1 mg/mL in Methanol) ((S)-N-methyl-N-(2-(5-((2-oxooxazolidin-4-yl)methyl)-1H-indol-3-yl)ethyl)nitrous amide)

Item no.

USP-1A09030

Unit

1 mL

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USP-1A09200

N-Nitroso Enalapril Solution (1 mg/mL in Methanol) (N-((S)-1-Ethoxy-1-oxo-4-phenylbutan-2-yl)-N-nitroso-L-alanylproline)

Item no.

USP-1A09200

Unit

1 mL

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USP-1A09250

N-Nitroso N-Desmethyl Mifepristone Solution (1 mg/mL in Methanol)

Item no.

USP-1A09250

Unit

1 mL

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USP-1A09360

N-Nitroso N-Desmethyl Thonzylamine Solution (1 mg/mL in Methanol) (N-(2-((4-Methoxybenzyl)(pyrimidin-2-yl)amino)ethyl)-N-methylnitrous amide)

Item no.

USP-1A09360

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-1A09780

N-Nitroso N-Desmethyl Desvenlafaxine Solution (1 mg/mL in Methanol) (N-[2-(1-Hydroxycyclohexyl)-2-(4-hydroxyphenyl)ethyl]-N-methylnitrousamide)

Item no.

USP-1A09780

CAS Number

[3017268-48-0]

Unit

1 mL

Molecular formula

C15H22N2O3

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USP-1A13410

Edaravone Deoxy Dimer (3',5-Dimethyl-1',2-diphenyl-1'H,2H-[3,4'-bipyrazol]-5'-ol)

Item no.

USP-1A13410

Unit

25 mg

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USP-1A14220

Hydrocortisone Glyoxal (Mixture of aldehyde and hydrate form) (Mixture of 11beta,17-Dihydroxy-3,20-dioxopregn-4-en-21-al and 11beta,17,21,21-Tetrahydroxypregn-4-ene-3,20-dione)

Item no.

USP-1A14220

Unit

25 mg

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USP-1A14670

Glyceryl Ester of Cetirizine Dihydrochloride (2,3-Dihydroxypropyl 2-(2-{4-[(4-chlorophenyl)phenylmethyl]piperazin-1-yl}ethoxy)acetate dihydrochloride)

Item no.

USP-1A14670

Unit

25 mg

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USP-1A15220

Butyloxycarbonyl Dabigatran Ethyl Ester (Ethyl 3-{2-[({4-[N-(butoxycarbonyl)carbamimidoyl]phenyl}amino)methyl]-1-methyl-N-(pyridin-2-yl)-1H-benzimidazole-5-carboxamido}propanoate)

Item no.

USP-1A15220

Unit

25 mg

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USP-1A15290

Desethyloxybromopyrimidin Macitentan (N-[5-(4-Bromophenyl)-1,6-dihydro-6-oxo-4-pyrimidinyl]-N'-propylsulfamide)

Item no.

USP-1A15290

Unit

25 mg

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USP-1A15420

Butoxyquinolinone Brexpiprazole (7-[4-(7-{4-[4-(Benzo[b]thiophen-4-yl)piperazin-1-yl]butoxy}quinolin-2-yloxy)butoxy]quinolin-2(1H)-one)

Item no.

USP-1A15420

Unit

25 mg

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USP-1A16340

Butenyloxy Pimavanserin (1-(4-Fluorobenzyl)-3-{4-[(2-methylallyl)oxy]benzyl}-1-(1-methylpiperidin-4-yl)urea)

Item no.

USP-1A16340

Unit

25 mg

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USP-1A16350

sec-Butyloxy Pimavanserin (3-[4-(sec-Butoxy)benzyl]-1-(4-fluorobenzyl)-1-(1-methylpiperidin-4-yl)urea)

Item no.

USP-1A16350

Unit

25 mg

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USP-1A16360

Bis(4-isobutoxybenzyl)urea (1,3-Bis(4-isobutoxybenzyl)urea)

Item no.

USP-1A16360

Unit

25 mg

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USP-1A16450

S,S-Phenyltetrahydroisoquinoline urea (bis((S)-1-phenyl-3,4-dihydroisoquinolin-2(1H)-yl)methanone))

Item no.

USP-1A16450

Unit

25 mg

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USP-1A16550

Indole Bromfenac ((4-bromophenyl)(1H-indol-7-yl)methanone)

Item no.

USP-1A16550

Unit

25 mg

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USP-1A16570

Bromoindole Bromfenac ((3-bromo-1H-indol-7-yl)(4-bromophenyl)methanone)

Item no.

USP-1A16570

Unit

25 mg

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USP-1A16820

Dedimethyl Afatinib Dimer (N1,N2-bis(4-((3-chloro-4-fluorophenyl)amino)-7-(((S)-tetrahydrofuran-3-yl)oxy)quinazolin-6-yl)oxalamide)

Item no.

USP-1A16820

Unit

25 mg

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USP-1A16830

Diketo Afatinib ((S)-N1-(4-((3-chloro-4-fluorophenyl)amino)-7-((tetrahydrofuran-3-yl)oxy)quinazolin-6-yl)-N2,N2-dimethyloxalamide)

Item no.

USP-1A16830

Unit

25 mg

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USP-1A16910

N-(2-methoxyethyl) Apalutamide (4-{7-[6-Cyano-5-(trifluoromethyl)-3-pyridinyl]-8-oxo-6-thioxo-5,7-diazaspiro[3.4]oct-5-yl}-2-fluoro-N-(2-methoxyethyl)-N-methylbenzamide)

Item no.

USP-1A16910

Unit

25 mg

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USP-1A16990

Binimetinib Isomer (6-((4-bromo-2-fluorophenyl)amino)-7-fluoro-N-(2-hydroxyethoxy)-1-methyl-1H-benzo[d]imidazole-5-carboxamide)

Item no.

USP-1A16990

Unit

25 mg

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USP-1A17000

Binimetinib Acid (5-((4-Bromo-2-fluorophenyl)amino)-4-fluoro-1-methyl-1H-benzo[d]imidazole-6-carboxylic acid)

Item no.

USP-1A17000

Unit

25 mg

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USP-1A17030

Descyclopropyl Cabozantinib Urea Dimer (1,3-bis[4-(6,7-dimethoxyquinolin-4-yl)oxyphenyl]urea)

Item no.

USP-1A17030

Unit

25 mg

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USP-1A17090

Darolutamide Amide (N-((S)-1-(3-(4-carbamoyl-3-chlorophenyl)-1H-pyrazol-1-yl)propan-2-yl)-5-(1-hydroxyethyl)-1H-pyrazole-3-carboxamide)

Item no.

USP-1A17090

Unit

25 mg

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USP-1A17140

N-Demethyl Fruquintinib (6-((6,7-dimethoxyquinazolin-4-yl)oxy)-2-methylbenzofuran-3-carboxamide)

Item no.

USP-1A17140

Unit

25 mg

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USP-1A18630

Bispyrimidinylpiperazinyl Butane (1,4-Bis[4-(pyrimidin-2-yl)piperazin-1-yl]butane)

Item no.

USP-1A18630

Unit

25 mg

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USP-1A18660

Bisbenzimidazole piperdinylpropyl Domperidone (1,3-Bis{3-[4-(5-chloro-2-oxo-2,3-dihydro-1H-benzimidazol-1-yl)-1-piperidinyl]propyl}-1,3-dihydro-2H-benzimidazol-2-one)

Item no.

USP-1A18660

Unit

25 mg

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USP-1A18680

N-Formyl Cefpodoxime Proxetil (1-[(Isopropoxycarbonyl)oxy]ethyl (6R,7R)-7-[(Z)-2-(2-formamidothiazol-4-yl)-2-(methoxyimino)acetamido]-3-(methoxymethyl)-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylate)

Item no.

USP-1A18680

Unit

25 mg

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USP-1A18690

Mometasone 9,11-Epoxide (21-Chloro-9,11beta-epoxy-17-hydroxy-16alpha-methyl-9beta-pregna-1,4-diene-3,20-dione)

Item no.

USP-1A18690

Unit

25 mg

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USP-1A18730

Trazodone Isobutyl Ether Hydrochloride (1-(3-Chlorophenyl)-4-(3-isobutoxypropyl)piperazine Hydrochloride)

Item no.

USP-1A18730

Unit

25 mg

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USP-1A19000

Diketopiperazines of Ampicillin ((4S)-2-(3,6-Dioxo-5-phenylpiperazin-2-yl)-5,5-dimethylthiazolidine-4-carboxylic acid)

Item no.

USP-1A19000

Unit

25 mg

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USP-1A19960

Ethoxypropenyl N-Boc Palbociclib ((E)-tert-Butyl 4-(6-((8-cyclopentyl-6-(2-ethoxyvinyl)-5-methyl-7-oxo-7,8-dihydropyrido[2,3-d]pyrimidin-2-yl)amino)pyridin-3-yl)piperazine-1-carboxylate)

Item no.

USP-1A19960

Unit

25 mg

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USP-1A20020

Despropan-2-yl Selexipag Acid (2-(4-((5,6-diphenylpyrazin-2-yl)amino)butoxy)acetic acid)

Item no.

USP-1A20020

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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