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Pharmaceutical Reference Standards

USP - United States Pharmacopeia Pharmaceutical Analytical Impurities

1507 products found

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USP-1A02680

Thiazolylacetyl Glycine Oxime Acetal ((Z)-2-(2-Aminothiazol-4-yl)-N-(2,2-dihydroxyethyl)-2-(hydroxyimino)acetamide)

Item no.

USP-1A02680

Unit

25 mg

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USP-1A03340

Varenicline Formamide (6,7,9,10-tetrahydro-8H-6,10-methanoazepino[4,5-g]quinoxaline-8-carbaldehyde)

Item no.

USP-1A03340

Unit

25 mg

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USP-1A04590

Brexpiprazole N-oxide (4-(benzo[b]thiophen-4-yl)-1-(4-((2-oxo-1,2-dihydroquinolin-7-yl)oxy)butyl)piperazine 1-oxide)

Item no.

USP-1A04590

Unit

25 mg

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USP-1A04790

Lenalidomide Open Ring Diacid (2-(4-amino-1-oxoisoindolin-2-yl)pentanedioic acid)

Item no.

USP-1A04790

Unit

25 mg

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USP-1A05040

Sunitinib Amide (5-[(Z)-(5-Fluoro-1,2-dihydro-2-oxo-3H-indol-3-ylidene)methyl]-2,4-dimethyl-1H-pyrrole-3-carboxamide)

Item no.

USP-1A05040

Unit

25 mg

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USP-1A05150

N-Nitroso Desmethyl Orphenadrine (NMOA) Solution (1 mg/mL in Methanol) (N-methyl-N-(2-(phenyl(o-tolyl)methoxy)ethyl)nitrous amide)

Item no.

USP-1A05150

Unit

1 mL

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USP-1A05270

N-Nitroso Pramipexole Solution (1 mg/mL in Methanol) ((S)-N-(2-amino-4,5,6,7-tetrahydrobenzo[d]thiazol-6-yl)-N-propylnitrous amide)

Item no.

USP-1A05270

Unit

1 mL

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USP-1A05350

N-Nitroso Bupropion Solution (1 mg/mL in Methanol) (N-(tert-butyl)-N-(1-(3-chlorophenyl)-1-oxopropan-2-yl) nitrous amide)

Item no.

USP-1A05350

Unit

1 mL

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USP-1A05520

Dinaphthyl Thiocarbonate (O,O-dinaphthalen-2-yl carbonothioate)

Item no.

USP-1A05520

Unit

25 mg

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USP-1A05540

Atracurium Iodide 1-Methylpentanediol Analog (2'-{3,3'-[Hexane-1,5-diylbis(oxy)]bis(3-oxopropane-3,1-diyl)}bis[1-(3,4-dimethoxybenzyl)-6,7-dimethoxy-2-methyl-1,2,3,4-tetrahydroisoquinolinium] iodide)

Item no.

USP-1A05540

Unit

25 mg

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USP-1A05590

Fluticasone Acetate ((6S,8S,9R,10S,11S,13S,14S,16R,17R)-6,9-difluoro-17-(((fluoromethyl) thio)carbonyl)-11-hydroxy-10,13,16-trimethyl-3-oxo-6,7,8,9,10,11,12,13,14,15,16,17-dodecahydro-3H-cyclopenta[a]phenanthren-17-yl acetate)

Item no.

USP-1A05590

Unit

25 mg

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USP-1A05600

Desethylazilsartan Open Ring (3-((2'-(N-hydroxycarbamimidoyl)-[1,1'-biphenyl]-4-yl)methyl)-2-oxo-2,3-dihydro-1H-benzo[d]imidazole-4-carboxylic acid)

Item no.

USP-1A05600

Unit

25 mg

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USP-1A05950

Trimethoprim 4-ol (2-amino-5-(3,4,5-trimethoxybenzyl) pyrimidin-4-ol)

Item no.

USP-1A05950

Unit

25 mg

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USP-1A06020

Dealkyl Atazanavir (Methyl [(5S,10S,11S,14S)-11-benzyl-5-(tert-butyl)-10-hydroxy-15,15-dimethyl-3,6,13-trioxo-2-oxa-4,7,8,12-tetraazahexadecan-14-yl]carbamate)

Item no.

USP-1A06020

Unit

25 mg

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USP-1A06040

Hordenine (4-(2-(dimethylamino)ethyl)phenol)

Item no.

USP-1A06040

Unit

25 mg

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USP-1A06090

Thienotetrahydropyridinone Hydrochloride (5,6,7,7a-tetrahydrothieno[3,2-c]pyridin-2(4H)-one hydrochloride)

Item no.

USP-1A06090

Unit

25 mg

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USP-1A06160

Atazanavir Benzylidenehydrazine Carbamate (Methyl [(S)-1-{[(2S,3S)-3-hydroxy-1-phenyl-4-{1-[4-(pyridin-2-yl)benzyl]-2-[4-(pyridin-2-yl)benzylidene]hydrazinyl}butan-2-yl]amino}-3,3-dimethyl-1-oxobutan-2-yl]carbamate)

Item no.

USP-1A06160

Unit

25 mg

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USP-1A06200

Didesmethyl Desvenlafaxine (4-(2-amino-1-(1-hydroxycyclohexyl)ethyl)phenol)

Item no.

USP-1A06200

Unit

25 mg

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USP-1A06280

Piperazinedionecarbonyl D-phenylglycine ((R)-(4-ethyl-2,3-dioxopiperazine-1-carboxamido)phenylacetic acid)

Item no.

USP-1A06280

Unit

25 mg

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USP-1A06350

Rotigotine O-Tosylate Hydrochloride ((S)-6-(propyl(2-(thiophen-2-yl)ethyl)amino)-5,6,7,8-tetrahydronaphthalen-1-yl 4-methylbenzenesulfonate hydrochloride)

Item no.

USP-1A06350

CAS Number

[n/a]

Unit

25 mg

Molecular formula

C26H31NO3S2 · HCl

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USP-1A06400

Rotigotine Hydrochloride Ethyl Analog ((S)-6-(ethyl(2-(thiophen-2-yl)ethyl)amino)-5,6,7,8-tetrahydronaphthalen-1-ol hydrochloride)

Item no.

USP-1A06400

CAS Number

[1369532-05-7]

Unit

25 mg

Molecular formula

C18H23NOS · HCl

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USP-1A06410

O-Thienylethyl Rotigotine Hydrochloride ((S)-N-propyl-5-(2-(thiophen-2-yl)ethoxy)-N-(2-(thiophen-2-yl)ethyl)-1,2,3,4-tetrahydronaphthalen-2-amine hydrochloride)

Item no.

USP-1A06410

CAS Number

[n/a]

Unit

25 mg

Molecular formula

C25H31NOS2 · HCl

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USP-1A06460

Acetyl Rotigotine Hydrochloride ((S)-6-(propyl(2-(thiophen-2-yl)ethyl)amino)-5,6,7,8-tetrahydronaphthalen-1-yl acetate hydrochloride)

Item no.

USP-1A06460

CAS Number

[1229620-82-9]

Unit

25 mg

Molecular formula

C21H27NO2S · HCl

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USP-1A06640

Trityl Candesartan Cilexetil (1-Cyclohexyloxycarbonyloxyethyl 2-ethoxy-1-{[2'-(1-trityl-1H-tetrazol-5-yl)biphenyl-4-yl]methyl}benzimidazole-7-carboxylate)

Item no.

USP-1A06640

Unit

25 mg

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USP-1A06770

Ezetimibe Tetrahydropyran Analog ((2R,3R,6S)-N,6-bis(4-fluorophenyl)-2-(4-hydroxyphenyl)tetrahydro-2H-pyran-3-carboxamide)

Item no.

USP-1A06770

CAS Number

[1296129-15-1]

Unit

25 mg

Molecular formula

C24H21F2NO3

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USP-1A06780

Fluticasone Dimer

Item no.

USP-1A06780

Unit

25 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-1A06870

D-Leucine Orlistat (COLD SHIPMENT REQUIRED) ((S)-1-[(2S,3S)-3-Hexyl-4-oxooxetan-2-yl]tridecan-2-yl formyl-D-leucinate)

Item no.

USP-1A06870

Unit

25 mg

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USP-1A06960

Efavirenz Amino Alcohol Ethyl Carbamate (ethyl (S)-(4-chloro-2-(4-cyclopropyl-1,1,1-trifluoro-2-hydroxybut-3-yn-2-yl)phenyl)carbamate)

Item no.

USP-1A06960

Unit

25 mg

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USP-1A06980

6alpha-Hydroxyestradiol ((6S,8R,9S,13S,14S,17S)-13-methyl-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthrene-3,6,17-triol)

Item no.

USP-1A06980

Unit

25 mg

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USP-1A07120

Apixaban Open Ring Amide (6-(4-((5-amino-5-oxopentyl)amino)phenyl)-1-(4-methoxyphenyl)-7-oxo-4,5,6,7-tetrahydro-1H-pyrazolo[3,4-c]pyridine-3-carboxamide)

Item no.

USP-1A07120

Unit

25 mg

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USP-1A07380

Fluvoxamine Maleamide (13-oxo-7-(4-(trifluoromethyl)phenyl)-2,9-dioxa-8,12-diazahexadeca-7,14-dien-16-oic acid)

Item no.

USP-1A07380

Unit

25 mg

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USP-1A07510

Mebendazole Dimer (1,3-Bis(5-benzoylbenzimidazol-2-yl)urea)

Item no.

USP-1A07510

Unit

25 mg

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USP-1A07580

Doxylamine Alcohol Hydrochloride (1-Phenyl-1-(pyridin-2-yl)ethan-1-ol hydrochloride)

Item no.

USP-1A07580

Unit

25 mg

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USP-1A07610

Nabumetone Alcohol (4-(6'-methoxy-2'-naphthyl)-butan-2-ol)

Item no.

USP-1A07610

Unit

25 mg

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USP-1A07720

2-Amino-5-chloropyridine (5-Chloro-2-pyridinamine)

Item no.

USP-1A07720

Unit

25 mg

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USP-1A07750

Sildenafil N-Oxide (1-[3-(6,7-Dihydro-1-methyl-7-oxo-3-propyl-1H-pyrazolo[4,3-d]pyrimidin-5-yl)-4-ethoxyphenyl]sulfonyl-4-methylpiperazineN4-oxide)

Item no.

USP-1A07750

CAS Number

[1094598-75-0]

Unit

25 mg

Molecular formula

C22H30N6O5S

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USP-1A07840

Methoxy Carbamazepine (10-Methoxy-5H-dibenz[b,f]azepine-5-carboxamide)

Item no.

USP-1A07840

Unit

25 mg

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USP-1A07860

Isobutylglutaric Acid (3-Isobutylpentanedioic acid)

Item no.

USP-1A07860

Unit

25 mg

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USP-1A07880

Rosiglitazone Propanamide (3-(4-(2-(methyl(pyridin-2-yl)amino)ethoxy)phenyl)propanamide, 3-[4-({2-[Methyl(2-pyridinyl)amino]ethyl}oxy)phenyl]propanamide)

Item no.

USP-1A07880

Unit

25 mg

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USP-1A07950

N-Carboxymethyl vinylpyrrolidinone (2-(2-oxo-5-vinylpyrrolidin-1-yl)acetic acid)

Item no.

USP-1A07950

Unit

25 mg

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USP-1A07970

2-(Benzylthio)-N,N-diethylethanamine (2-(Benzylsulfanyl)-N,N-diethylethanamine)

Item no.

USP-1A07970

Unit

25 mg

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USP-1A07980

Tetraethylcystamine Dihydrochloride (2,2'''-Dithiobis(triethylamine) dihydrochloride)

Item no.

USP-1A07980

Unit

25 mg

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USP-1A08030

rac-Itraconazole Propyl analog (4-(4-{4-[4-({(2RS,4SR)-2-[(1H-1,2,4-Triazol-1-yl)methyl]-2-(2,4-dichlorophenyl)-1,3-dioxolan-4-yl}methoxy)phenyl]piperazin-1-yl}phenyl)-2-propyl-2H-1,2,4-triazol-3(4H)-one)

Item no.

USP-1A08030

Unit

25 mg

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USP-1A08190

N-Carbamoyl Oxcarbazepine (N-Carbamoyl-10-oxo-10,11-dihydro-5H-dibenzo[b,f]azepine-5-carboxamide)

Item no.

USP-1A08190

CAS Number

[2642430-30-4]

Unit

25 mg

Molecular formula

C16H13N3O3

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USP-1A08410

Deschloro Bupropion Hydrochloride (2-(tert-Butylamino)-1-phenylpropan-1-one hydrochloride)

Item no.

USP-1A08410

Unit

25 mg

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USP-1A10830

Thyroxine T4-Benzoic Acid (4-(4-Hydroxy-3,5-diiodophenoxy)-3,5-diiodobenzoic acid)

Item no.

USP-1A10830

Unit

10 mg

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USP-1A10850

O-Methyl Tetraiodothyroethylamine (2-[4-(3,5-Diiodo-4-methoxyphenoxy)-3,5-diiodophenyl]ethanamine)

Item no.

USP-1A10850

Unit

10 mg

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USP-1A11460

cis-Isoterbinafine Hydrochloride ((Z)-N,6,6-Trimethyl-N-(naphthalen-2-ylmethyl)hept-2-en-4-yn-1-amine Hydrochloride)

Item no.

USP-1A11460

Unit

25 mg

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USP-1A14360

Isoloratadine (Ethyl 4-(8-chloro-5,6-dihydro-11H-benzo[5,6]cyclohepta[1,2-b]pyridin-11-yl)-3,6-dihydropyridine-1(2H)-carboxylate)

Item no.

USP-1A14360

Unit

25 mg

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