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Pharmaceutical Reference Standards

USP - United States Pharmacopeia Pharmaceutical Analytical Impurities

1507 products found

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USP-1A00010

Atorvastatin Ethyl Ester (ethyl (3R,5R)-7-(2-(4-fluorophenyl)-5-isopropyl-3-phenyl-4-(phenylcarbamoyl)-1H-pyrrol-1-yl)-3,5-dihydroxyheptanoate)

Item no.

USP-1A00010

CAS Number

[1146977-93-6]

Unit

25 mg

Molecular formula

C35H39FN2O5

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USP-1A00020

Atorvastatin Methyl Ester (methyl (3R,5R)-7-(2-(4-fluorophenyl)-5-isopropyl-3-phenyl-4-(phenylcarbamoyl)-1H-pyrrol-1-yl)-3,5-dihydroxyheptanoate)

Item no.

USP-1A00020

CAS Number

[345891-62-5]

Unit

25 mg

Molecular formula

C34H37FN2O5

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USP-1A00200

Amlodipine Ethyl Analog (diethyl 2-((2-aminoethoxy)methyl)-4-(2-chlorophenyl)-6-methyl-1,4-dihydropyridine-3,5-dicarboxylate, maleate)

Item no.

USP-1A00200

CAS Number

[400024-12-6]

Unit

25 mg

Molecular formula

C21H27ClN2O5 · (C4H4O4)

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USP-1A00230

N-Isopropyl Carvedilol (1-(9H-Carbazol-4-yloxy)-3-[[2-(2-methoxyphenoxy)ethyl](1-methylethyl)amino]-2-propanol)

Item no.

USP-1A00230

CAS Number

[1246819-01-1]

Unit

25 mg

Molecular formula

C27H32N2O4

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USP-1A00260

Azacitidine Formyl Amidine Analog (N-(Formyl amidino)-N'-Beta-D-ribofuranosylurea) (INTERNATIONAL COLD CHAIN SHIPMENT REQUIRED)

Item no.

USP-1A00260

CAS Number

[65126-88-7]

Unit

25 mg

Molecular formula

C8H14N4O6

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USP-1A00270

Azacitidine Isomer -3 (1-Beta-D-Ribofuranosyl-3-aminocarbonyl guanidine acetate)

Item no.

USP-1A00270

CAS Number

[n/a]

Unit

25 mg

Molecular formula

C9H18N4O7

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USP-1A00500

Budesonide D-homo Analog ((4aR,4bS,5S,6aS,7aR,10aR,11aS,11bS)-5-hydroxy-7a-(hydroxymethyl)-4a,6a-dimethyl-9-propyl-4b,6,6a,7a,10a,11,11a,11b,12,13-decahydrochryseno[2,3-d][1,3]dioxole-2,7(4aH,5H)-dione)

Item no.

USP-1A00500

CAS Number

[1040085-99-1]

Unit

10 mg

Molecular formula

C25H34O6

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USP-1A00510

Budesonide Acetaldehyde Acetal (16alpha,17-[(1RS)-ethylidenebis(oxy)]-11beta,21-dihydroxypregna-1,4-diene-3,20-dione)

Item no.

USP-1A00510

CAS Number

[1040085-98-0]

Unit

25 mg

Molecular formula

C23H30O6

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USP-1A00760

Atorvastatin 3-deoxyhept-2-enoic Acid ((S,E)-7-(2-(4-fluorophenyl)-5-isopropyl-3-phenyl-4-(phenylcarbamoyl)-1H-pyrrol-1-yl)-5-hydroxyhept-2-enoic acid)

Item no.

USP-1A00760

CAS Number

[1105067-93-3]

Unit

25 mg

Molecular formula

C33H33FN2O4

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USP-1A00800

Atorvastatin Epoxy Tetrahydrofuran Analog (4-(4-Fluorophenyl)-2,4-dihydroxy-2-(1-methylethyl)-N,5-diphenyl-3,6-dioxabicyclo[3.1.0]hexane-1-carboxamide)

Item no.

USP-1A00800

CAS Number

[873950-19-7]

Unit

25 mg

Molecular formula

C26H24FNO5

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USP-1A00970

N-Methyl Duloxetine Oxalate ((S)-N,N-dimethyl-3-(naphthalen-1-yloxy)-3-(thiophen-2-yl)propan-1-amine, oxalate)

Item no.

USP-1A00970

CAS Number

[132335-47-8]

Unit

25 mg

Molecular formula

C19H21NOS·C2H2O4 (C21H23NO5S)

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USP-1A01030

1,2-Dihydro Fluticasone Propionate

Item no.

USP-1A01030

CAS Number

[105613-90-9]

Unit

25 mg

Molecular formula

C25H33F3O5S

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USP-1A01050

6-Methyl-4-phenylchromanol (6-Methyl-4-phenylchroman-2-ol)

Item no.

USP-1A01050

CAS Number

[209747-04-6]

Unit

25 mg

Molecular formula

C16H16O2

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USP-1A01060

6-Methyl-4-phenylchromanone (6-Methyl-4-phenylchroman-2-one)

Item no.

USP-1A01060

CAS Number

[40546-94-9]

Unit

25 mg

Molecular formula

C16H14O2

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USP-1A01110

Dehydro Desloratadine (8-chloro-11-(piperidin-4-ylidene)-11H-benzo[5,6]cyclohepta[1,2-b]pyridine)

Item no.

USP-1A01110

CAS Number

[117811-20-8]

Unit

25 mg

Molecular formula

C19H17ClN2

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USP-1A01140

Pemetrexed Acid (4-(2-(2-amino-4-oxo-4,7-dihydro-3H-pyrrolo[2,3-d]pyrimidin-5-yl)ethyl)benzoic acid)

Item no.

USP-1A01140

CAS Number

[137281-39-1]

Unit

25 mg

Molecular formula

C15H14N4O3

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USP-1A01190

Rivaroxaban N-acyl glycolic acid ((S)-2-(2-(5-chloro-N-(4-(5-((5-chlorothiophene-2-carboxamido)methyl)-2-oxooxazolidin-3-yl)phenyl)thiophene-2-carboxamido)ethoxy)acetic acid)

Item no.

USP-1A01190

CAS Number

[1151893-81-0]

Unit

25 mg

Molecular formula

C24H21Cl2N3O7S2

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USP-1A01200

Rosuvastatin Lactone (N-[4-(4-Fluorophenyl)-5-{(E)-2-[(2S,4R)-4-hydroxy-6-oxotetrahydro-2H-pyran-2-yl]vinyl}-6-isopropylpyrimidin-2-yl]-N-methylmethanesulfonamide)

Item no.

USP-1A01200

CAS Number

[503610-43-3]

Unit

25 mg

Molecular formula

C22H26FN3O5S

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USP-1A01220

16Alpha-Hydroxy Prednisolone-14-ene Acetate (2-Oxo-2-((8R,9S,10R,11S,13S,16R,17S)-11,16,17-trihydroxy-10,13-dimethyl-3-oxo-6,7,8,9,10,11,12,13,16,17-decahydro-3H-cyclopenta[a]phenanthren-17-yl)ethyl acetate)

Item no.

USP-1A01220

CAS Number

[131918-72-4]

Unit

25 mg

Molecular formula

C23H28O7

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USP-1A01300

Bis(dimethylaminoethyl) Ether Dihydrochloride (2,2'-oxybis(N,N-dimethylethan-1-amine), hydrochloride)

Item no.

USP-1A01300

CAS Number

[103526-47-2]

Unit

25 mg

Molecular formula

C8H20N2O·2HCl

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USP-1A01340

2,3-Dimethyl-2,3-butanediamine Dihydrochloride (2,3-dimethylbutane-2,3-diamine, hydrochloride)

Item no.

USP-1A01340

CAS Number

[75804-28-3]

Unit

25 mg

Molecular formula

C6H16N2·2HCl

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USP-1A01460

Rivaroxaban Open Chain Dithiophene Analog ((S)-5-chloro-N-(4-(5-((5-chlorothiophene-2-carboxamido)methyl)-2-oxooxazolidin-3-yl)phenyl)-N-(2-(2-(methylamino)-2-oxoethoxy)ethyl)thiophene-2-carboxamide)

Item no.

USP-1A01460

CAS Number

[1807455-76-0]

Unit

10 mg

Molecular formula

C25H24Cl2N4O6S2

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USP-1A01630

Tolyloyl Propionamide (N,N-Dimethyl-4-oxo-4-(p-tolyl)butanamide)

Item no.

USP-1A01630

CAS Number

[402470-91-1]

Unit

25 mg

Molecular formula

C13H17NO2

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USP-1A01770

5-Dimethylaminobutyryl Citalopram Oxalate (4-(dimethylamino)-1-(1-(3-(dimethylamino)propyl)-1-(4-fluorophenyl)-1,3-dihydroisobenzofuran-5-yl)butan-1-one, oxalate)

Item no.

USP-1A01770

CAS Number

[n/a]

Unit

25 mg

Molecular formula

C25H33FN2O2. 2 C2H2O4

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USP-1A01840

Isobutylglutarmonoamide (3-(2-Amino-2-oxoethyl)-5-methylhexanoic Acid)

Item no.

USP-1A01840

CAS Number

[181289-15-6]

Unit

25 mg

Molecular formula

C9H17NO3

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USP-1A08910

N-Nitroso Desloratadine Solution (1 mg/mL in Methanol) (8-chloro-6,11-dihydro-11-(1-nitroso-4-piperidinylidene)-5H-Benzo[5,6]cyclohepta[1,2-b]pyridine)

Item no.

USP-1A08910

Unit

1 mL

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USP-1A08920

N-Nitroso Dorzolamide Solution (1 mg/mL in Methanol) ((4S,6S)-4-(ethyl(nitroso)amino)-6-methyl-5,6-dihydro-4H-thieno[2,3-b]thiopyran-2-sulfonamide 7,7-dioxide)

Item no.

USP-1A08920

Unit

1 mL

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USP-1A11610

Fluticasone 2-(Fluoromethoxy)acetyl 5-chloro Furan-2-carboxylic Acid ((6alpha,11beta,16alpha,17alpha)-6,9-Difluoro-17-{[(fluoromethyl)sulfanyl]carbonyl}-11-hydroxy-16-methyl-3-oxoandrosta-1,4-dien-17-yl 5-chloro-2-furoate)

Item no.

USP-1A11610

Unit

25 mg

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USP-1A11930

Ticagrelor Sulfone ((1S,2S,3R,5S)-3-(7-(((1R,2S)-2-(3,4-difluorophenyl)cyclopropyl)amino)-5-(propylsulfonyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidin-3-yl)-5-(2-hydroxyethoxy)cyclopentane-1,2-diol)

Item no.

USP-1A11930

Unit

25 mg

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USP-1A12220

(2S,3R) Isavuconazole (rel-4-(2-((2S,3R)-3-(2,5-difluorophenyl)-3-hydroxy-4-(1H-1,2,4-triazol-1-yl)butan-2-yl)thiazol-4-yl)benzonitrile)

Item no.

USP-1A12220

Unit

25 mg

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USP-1A12290

N-Nitroso Edoxaban (N1-(5-chloropyridin-2-yl)-N2-((1S,2R,4S)-4-(dimethylcarbamoyl)-2-(5-nitroso-4,5,6,7-tetrahydrothiazolo[5,4-c]pyridine-2-carboxamido)cyclohexyl)oxalamide)

Item no.

USP-1A12290

Unit

25 mg

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USP-1A12690

Lidocaine N2-oxide (2-[(2,6-Dimethylphenyl)amino]-N,N-diethyl-2-oxoethan-1-amine oxide)

Item no.

USP-1A12690

Unit

25 mg

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USP-1A12710

2-(Diethylamino)-N-(2,4-dimethylphenyl)acetamide Hydrochloride (2-(Diethylamino)-N-(2,4-dimethylphenyl)acetamide hydrochloride)

Item no.

USP-1A12710

Unit

25 mg

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USP-1A12720

Desfluoro Paliperidone (3-{2-[4-(Benzisoxazol-3-yl)piperidin-1-yl]ethyl}-9-hydroxy-2-methyl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-4-one)

Item no.

USP-1A12720

Unit

25 mg

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USP-1A12810

Keto Safinamide ((S)-N-(1-Amino-1-oxopropan-2-yl)-4-[(3-fluorobenzyl)oxy]benzamide)

Item no.

USP-1A12810

Unit

25 mg

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USP-1A12920

Desfluoro Dolutegravir ((4R,12aS)-N-benzyl-7-hydroxy-4-methyl-6,8-dioxo-3,4,6,8,12,12a-hexahydro-2H-pyrido[1',2':4,5]pyrazino[2,1-b][1,3]oxazine-9-arboxamide)

Item no.

USP-1A12920

Unit

25 mg

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USP-1A13030

Ticagrelor Amine ((1S,2S,3R,5S)-3-(7-amino-5-(propylthio)-3H-[1,2,3]triazolo[4,5-d]pyrimidin-3-yl)-5-(2-hydroxyethoxy)cyclopentane-1,2-diol)

Item no.

USP-1A13030

Unit

25 mg

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USP-1A13130

Ranolazine 4N-Oxide (4-(2-((2,6-Dimethylphenyl)amino)-2-oxoethyl)-1-(2-hydroxy-3-(2-methoxyphenoxy)propyl)piperazine 1-oxide)

Item no.

USP-1A13130

Unit

25 mg

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USP-1A13330

16alpha-Methyl-9alpha-fluorocortisol 21-acetate (9-Fluoro-11beta,17-dihydroxy-16alpha-methyl-3,20-dioxopregn-4-en-21-yl acetate)

Item no.

USP-1A13330

Unit

25 mg

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USP-1A13520

6,8-Dioxo Apalutamide (4-(7-(6-Cyano-5-(trifluoromethyl)pyridin-3-yl)-6,8-dioxo-5,7-diazaspiro[3.4]octan-5-yl)-2-fluoro-N-methylbenzamide)

Item no.

USP-1A13520

Unit

25 mg

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USP-1A13710

Sacubitril Lactam ((3R,5S)-4-(5-([1,1'-Biphenyl]-4-ylmethyl)-3-methyl-2-oxopyrrolidin-1-yl)-4-oxobutanoic acid)

Item no.

USP-1A13710

Unit

25 mg

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USP-1A13780

Desacetyl Apremilast ((S)-4-Amino-2-[1-(3-ethoxy-4-methoxyphenyl)-2-(methylsulfonyl)ethyl]isoindoline-1,3-dione)

Item no.

USP-1A13780

Unit

25 mg

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USP-1A13810

Despropenepyridine Axitinib N-Acetyl Sulfoxide (2-[(1-Acetyl-1H-indazol-6-yl)sulfinyl]-N-methylbenzamide)

Item no.

USP-1A13810

Unit

25 mg

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USP-1A13860

Dabigatran Benzamide (3-{2-[((4-Carbamoylphenyl)amino)methyl]-1-methyl-N-(pyridin-2-yl)-1H-benzimidazole-5-carboxamido}propanoic acid)

Item no.

USP-1A13860

Unit

25 mg

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USP-1A13980

Estradiol Dibenzoate ((17beta)-Estra-1,3,5(10)-triene-3,17-diyl dibenzoate)

Item no.

USP-1A13980

Unit

25 mg

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USP-1A14000

Estrone Benzoate (17-Oxoestra-1,3,5(10)-trien-3-yl benzoate)

Item no.

USP-1A14000

Unit

25 mg

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USP-1A14020

Methoxy Ketorolac (5-Benzoyl-1-methoxy-2,3-dihydro-1H-pyrrolizine-1-carboxylic acid)

Item no.

USP-1A14020

Unit

25 mg

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USP-1A14040

Ketorolac Methyl Ester (Methyl 5-benzoyl-2,3-dihydro-1H-pyrrolizine-1-carboxylate)

Item no.

USP-1A14040

Unit

25 mg

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USP-1A14050

Ketorolac Ethyl Ester (Ethyl 5-benzoyl-2,3-dihydro-1H-pyrrolizine-1-carboxylate)

Item no.

USP-1A14050

Unit

25 mg

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USP-1A14120

Chloro Sofosbuvir (Isopropyl [(S)-{[(2R,3R,4R,5R)-5-(2,4-dioxo-3,4-dihydropyrimidin-1(2H)-yl)-4-chloro-3-hydroxy-4-methyltetrahydrofuran-2-yl]methoxy}(phenoxy)phosphoryl]-L-alaninate)

Item no.

USP-1A14120

Unit

25 mg

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