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Pharmaceutical Reference Standards

USP - United States Pharmacopeia Pharmaceutical Analytical Impurities

887 products found

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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-1A00731

Fexofenadine Olefin (2-(4-(4-(4-(diphenylmethylene)piperidin-1-yl)-1-hydroxybutyl)phenyl)-2-methylpropanoic acid)

Item no.

USP-1A00731

CAS Number

[1187954-57-9]

Unit

25 mg

Molecular formula

C32H37NO3

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USP-1A01010

Olanzapine lactam ((Z)-4-(4-methylpiperazin-1-yl)-3-(2-oxopropylidene)-1,3-dihydro-2H-benzo[b][1,4]diazepin-2-one)

Item no.

USP-1A01010

CAS Number

[1017241-34-7]

Unit

25 mg

Molecular formula

C17H20N4O2

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USP-1A01170

Rivaroxaban Glycolic Acid Analog ((S)-2-(2-((4-(5-((5-chlorothiophene-2-carboxamido)methyl)-2-oxooxazolidin-3-yl)phenyl)amino)ethoxy)acetic acid)

Item no.

USP-1A01170

CAS Number

[931204-39-6]

Unit

25 mg

Molecular formula

C19H20ClN3O6S

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USP-1A01520

Rivaroxaban N-methylphthalamido Analog ((S)-N1-methyl-N2-((2-oxo-3-(4-(3-oxomorpholino)phenyl)oxazolidin-5-yl)methyl)phthalamide)

Item no.

USP-1A01520

CAS Number

[2206360-74-7]

Unit

25 mg

Molecular formula

C23H24N4O6

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USP-1A05170

N-Nitroso Epinephrine Solution (1 mg/mL in Acetonitrile) ((R)-N-(2-(3,4-dihydroxyphenyl)-2-hydroxyethyl)-N-methylnitrous amide)

Item no.

USP-1A05170

Unit

1 mL

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USP-1A06560

Piperacillin penilloic acid ((4S)-2-[[[(2R)-2-[[(4-Ethyl-2,3-dioxo-1-piperazinyl)carbonyl]amino]-2-phenylacetyl]amino]methyl]-5,5-dimethyl-4-thiazolidinecarboxylic acid)

Item no.

USP-1A06560

CAS Number

[2649505-15-5]

Unit

10 mg

Molecular formula

C22H29N5O6S

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USP-1A06680

3'-O-(5-deoxy-alpha-D-ribofuranosyl) Capecitabine ([1-[5-Deoxy-3-O-(5-deoxy-alpha-d-ribofuranosyl)-beta-d-ribofuranosyl]-5-fluoro-2-oxo-1,2-dihydropyrimidin-4-yl]-carbamic acid pentyl ester)

Item no.

USP-1A06680

Unit

10 mg

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USP-1A06860

Orlistat Open Ring Epimer ((2S,3R,5S)-5-((formyl-L-leucyl)oxy)-2-hexyl-3-hydroxyhexadecanoic acid)

Item no.

USP-1A06860

Unit

25 mg

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USP-1A07130

Ditranexamic Acid Amine (Cyclohexanecarboxylic acid, 4,4', -[iminobis(methylene)]bis-, [trans(trans)], trans,trans-4,4'-[Iminobis(methylene)]dicyclohexanecarboxylic acid)

Item no.

USP-1A07130

Unit

25 mg

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USP-1A07420

Deschloroclomiphene Chlorophenyl Citrate Analog ((E,Z)-2-{4-[1,2-Bis(4-chlorophenyl)vinyl]phenoxy}-N,N-diethylethan-1-amine citrate) (part of promotion Clomiphene bundle)

Item no.

USP-1A07420

Unit

25 mg

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USP-1A07430

2-Vinylpyridine (2-Ethenylpyridine) (part of promotion Betahistine bundle)

Item no.

USP-1A07430

Unit

25 mg

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USP-1A07660

2-Pyridineethanol (2-(Pyridin-2-yl)ethanol) (part of promotion Betahistine bundle)

Item no.

USP-1A07660

Unit

25 mg

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USP-1A08000

Ammonium Tenivastatin ((3R,5R)-7-{((1S,2S,6R,8S,8aR)-8-[(2,2)-Dimethylbutanoyl)oxy]-2,6-dimethyl-1,2,6,7,8,8a-hexahydronaphthalen-1-yl}-3,5-dihydroxyheptanoic acid Ammonium Salt) (part of promotion Simvastatin bundle)

Item no.

USP-1A08000

Unit

25 mg

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USP-1A08060

Clomiphene Benzophenone Analog ([4-[2-(Diethylamino)ethoxy]phenyl]phenylmethanone) (part of promotion Clomiphene bundle)

Item no.

USP-1A08060

Unit

25 mg

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USP-1A08380

Pseudoerythromycin A Enol Ether

Item no.

USP-1A08380

Unit

25 mg

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USP-1A08390

Methylbis(2-pyridylethyl)amine Hydrochloride (N-Methyl-N,N-bis(2-pyridin-2-yl-ethyl)amine trihydrochloride) (part of promotion Betahistine bundle)

Item no.

USP-1A08390

Unit

25 mg

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USP-1A08620

Trifluoro-4-cresol (4-trifluoromethylphenol)

Item no.

USP-1A08620

Unit

25 mg

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USP-1A09140

N-Nitroso Salmeterol Solution (1 mg/mL in Acetonitrile) (N-(2-hydroxy-2-(4-hydroxy-3-(hydroxymethyl)phenyl)ethyl)-N-(6-(4-phenylbutoxy)hexyl)nitrous amide)

Item no.

USP-1A09140

Unit

1 mL

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USP-1A10250

Desethylene Quingestanol Acetate (3-Isopropoxy-19-nor-(17alpha)-pregn-3,5-dien-20-yn-17-yl acetate)

Item no.

USP-1A10250

Unit

25 mg

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USP-1A10290

Anhydroerythromycin A

Item no.

USP-1A10290

Unit

25 mg

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USP-1A10320

Epi Lovastatin ((1S,3R,7S,8S,8aR)-8-[2-[(2R,4R)-4-Hydroxy-6-oxotetrahydro-2H-pyran-2-yl]ethyl]-3,7-dimethyl-1,2,3,7,8,8a-hexahydronaphthalen-1-yl (2R)-2-methylbutanoate) (part of promotion Simvastatin bundle)

Item no.

USP-1A10320

Unit

25 mg

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USP-1A10330

Ganciclovir Divalinate Ditrifluoroacetate (2-[(2-Amino-6-oxo-1,6-dihydro-9H-purin-9-yl)methoxy]propane-1,3-diyl (2S,2'S)-bis(2-amino-3-methylbutanoate) ditrifluoroacetate) (part of promotion Valganciclovir bundle)

Item no.

USP-1A10330

Unit

25 mg

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USP-1A10340

(2R)-Vildagliptin ((R)-1-[N-(3-Hydroxyadamantan-1-yl)glycyl]-2-pyrrolidinecarbonitrile)

Item no.

USP-1A10340

Unit

25 mg

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USP-1A10350

Beclomethasone (9-Chloro-11beta,17,21-trihydroxy-16beta-methylpregna-1,4-diene-3,20-dione)

Item no.

USP-1A10350

Unit

25 mg

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USP-1A10360

Diclofenac Acetamide (N-(4-Chlorophenyl)-2-(2,6-dichlorophenyl)acetamide)

Item no.

USP-1A10360

Unit

25 mg

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USP-1A10370

Diclofenac Methyl Ester (Methyl 2-{2-[(2,6-dichlorophenyl)amino]phenyl}acetate)

Item no.

USP-1A10370

Unit

25 mg

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USP-1A10380

Edaravone Dimer (5,5'-Dimethyl-2,2'-diphenyl-2,2',4,4'-tetrahydro-3H,3'H-[4,4'-bipyrazole]-3,3'-dione)

Item no.

USP-1A10380

Unit

25 mg

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USP-1A10390

11beta-Hydroxy Androstenedione (11beta-Hydroxyandrost-4-ene-3,17-dione)

Item no.

USP-1A10390

Unit

25 mg

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USP-1A10400

Metronidazole Acid (2-(2-Methyl-5-nitroimidazol-1-yl)acetic acid)

Item no.

USP-1A10400

Unit

25 mg

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USP-1A10410

Chloro Naproxen ((S)-2-(5-Chloro-6-methoxynaphthalen-2-yl)propanoic acid)

Item no.

USP-1A10410

Unit

25 mg

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USP-1A10420

Bromo Naproxen ((2S)-2-(5-Bromo-6-methoxynaphthalen-2-yl)propanoic acid)

Item no.

USP-1A10420

Unit

25 mg

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USP-1A10430

Iodo Naproxen ((S)-2-(5-Iodo-6-methoxynaphthalen-2-yl)propanoic acid)

Item no.

USP-1A10430

Unit

25 mg

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USP-1A10440

Naproxen Ethyl Ester ((S)-Ethyl 2-(6-methoxynaphthalen-2-yl)propanoate)

Item no.

USP-1A10440

Unit

25 mg

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USP-1A10450

2-Ethylnerolin (2-Ethyl-6-methoxynaphthalene)

Item no.

USP-1A10450

Unit

25 mg

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USP-1A10460

Vildagliptin Dimer ((2S,2'S)-1,1'-{2,2'-[(3-Hydroxyadamantan-1-yl)azanediyl]bis(acetyl)}bis(pyrrolidine-2-carbonitrile))

Item no.

USP-1A10460

Unit

25 mg

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USP-1A10470

Desbromo Bromhexine (4-Bromo-2-[[cyclohexyl(methyl)amino]methyl]aniline)

Item no.

USP-1A10470

Unit

25 mg

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USP-1A10480

N-(Dichloroacetyl)-2,6-xylidide (N-(2,6-Dimethylphenyl)-2,2-dichloroacetamide)

Item no.

USP-1A10480

Unit

25 mg

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USP-1A10500

Dapsone Phenol (4-[(4-Aminophenyl)sulfonyl]phenol)

Item no.

USP-1A10500

Unit

25 mg

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USP-1A10510

Desamino Dapsone (4-(Phenylsulfonyl)aniline)

Item no.

USP-1A10510

Unit

25 mg

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USP-1A10520

Chloro Dapsone (4-[(4-Chlorophenyl)sulfonyl]aniline)

Item no.

USP-1A10520

Unit

25 mg

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USP-1A10530

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

Item no.

USP-1A10530

Unit

25 mg

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USP-1A10550

O-Benzyl Albuterol ((1-(4-(Benzyloxy)-3-(hydroxymethyl)phenyl)-2-(tert-butylamino)ethanol)

Item no.

USP-1A10550

Unit

25 mg

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USP-1A10560

4-Hydroxy 3-Hydroxymethylbenzaldehyde (4-Hydroxy-3-(hydroxymethyl)benzaldehyde)

Item no.

USP-1A10560

Unit

25 mg

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USP-1A10570

Amisulpride Acid (2-Methoxy-4-amino-5-ethylsulfonyl benzoic acid)

Item no.

USP-1A10570

Unit

25 mg

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USP-1A10580

Amlodipine Phthalic Acid Analog (2-[(2-{[4-(2-Chlorophenyl)-3-(ethoxycarbonyl)-5-(methoxycarbonyl)-6-methyl-1,4-dihydropyridin-2-yl]methoxy}ethyl)carbamoyl]benzoic acid)

Item no.

USP-1A10580

Unit

25 mg

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USP-1A10590

Cytidine (4-amino-1-beta-D-ribofuranosylpyrimidin-2(1H)-one)

Item no.

USP-1A10590

Unit

25 mg

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USP-1A10600

Diclofenac Benzaldehyde (2-[(2,6-Dichlorophenyl)amino]benzaldehyde)

Item no.

USP-1A10600

Unit

25 mg

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USP-1A10610

21-Deoxycortisol (11beta,17-Dihydroxypregn-4-ene-3,20-dione)

Item no.

USP-1A10610

Unit

25 mg

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USP-1A11180

N-[(2-Isopropylthiazol-4-yl)methyl]-N-methylnitrous amide (NITMA) (N-((2-isopropylthiazol-4-yl)methyl)-N-methylnitrous amide)

Item no.

USP-1A11180

Unit

10 mg

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