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Pharmaceutical Reference Standards

USP - United States Pharmacopeia Pharmaceutical Analytical Impurities

1025 products found

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USP-1A05190

N-Nitrosodiphenylamine (NDPh) (N,N-Diphenylnitrosoamine)

Item no.

USP-1A05190

Unit

10 mg

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USP-1A05240

N-Nitroso Paroxetine ((3S,4R)-3-((benzo[d][1,3]dioxol-5-yloxy)methyl)-4-(4-fluorophenyl)-1-nitrosopiperidine)

Item no.

USP-1A05240

Unit

25 mg

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USP-1A05260

N-Nitroso Phenylephrine Solution (1 mg/mL in Methanol) ((R)-N-(2-hydroxy-2-(3-hydroxyphenyl)ethyl)-N-methylnitrous amide)

Item no.

USP-1A05260

Unit

1 mL

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USP-1A05310

N-Nitroso Nebivolol (N-Nitroso-(RS)-1-[(RS)-6-fluorochroman-2-yl]-2-({(RS)-2-[(SR)-6-fluorochroman-2-yl]-2-hydroxyethyl}amino)ethan-1-ol)

Item no.

USP-1A05310

CAS Number

[1391051-68-5]

Unit

25 mg

Molecular formula

C22H24F2N2O5

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USP-1A05330

N-Nitroso Diclofenac (2-(2-((2,6-dichlorophenyl) (nitroso)amino)phenyl)acetic acid)

Item no.

USP-1A05330

Unit

10 mg

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USP-1A05390

N-Nitroso Benazepril (2-((S)-3-(((S)-1-ethoxy-1-oxo-4-phenylbutan-2-yl)(nitroso)amino)-2-oxo-2,3,4,5-tetrahydro-1H-benzo[b]azepin-1-yl)acetic acid)

Item no.

USP-1A05390

Unit

25 mg

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USP-1A05490

Methyl Eudesmate (Methyl 3,4,5-trimethoxybenzoate)

Item no.

USP-1A05490

Unit

25 mg

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USP-1A05500

Trimethoprim Acrylonitrile Analog (3-(Phenylamino)-2-(3,4,5-trimethoxybenzyl)acrylonitrile)

Item no.

USP-1A05500

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-1A05570

Atracurium Besylate Dimethylisoquinolinium Analog (1-(3,4-Dimethoxybenzyl)-6,7-dimethoxy-2,2-dimethyl-1,2,3,4-tetrahydroisoquinolinium benzenesulfonate)

Item no.

USP-1A05570

Unit

10 mg

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USP-1A05780

Atracurium Iodide Hexanediol Analog (2,2'-((hexane-1,6-diylbis(oxy))bis(3-oxopropane-3,1-diyl))bis(1-(3,4-dimethoxybenzyl)-6,7-dimethoxy-2-methyl-1,2,3,4-tetrahydroisoquinolin-2-ium) iodide)

Item no.

USP-1A05780

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-1A06100

Acetylthienotetrahydropyridine Hydrochloride (4,5,6,7-tetrahydrothieno[3,2-c]pyridin-2-yl acetate hydrochloride)

Item no.

USP-1A06100

Unit

25 mg

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USP-1A06110

Prasugrel Diketone (1-Cyclopropyl-2-(2-fluorophenyl)ethane-1,2-dione)

Item no.

USP-1A06110

Unit

25 mg

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USP-1A06150

Atazanavir S,R,S,S-diastereomer ((3S,8R,9S,12S)-3,12-Bis(1,1-dimethylethyl)-8-hydroxy-4,11-dioxo-9-(phenylmethyl)-6-[[4-(2-pyridinyl)phenyl]methyl]-2,5,6,10,13-pentaazatetradecanedioic acid dimethyl ester)

Item no.

USP-1A06150

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-1A06170

Atazanavir Formyl Analog (methyl ((S)-1-(((2S,3S)-4-(2-((S)-2-formamido-3,3-dimethylbutanoyl)-1-(4-(pyridin-2-yl)benzyl)hydrazinyl)-3-hydroxy-1-phenylbutan-2-yl)amino)-3,3-dimethyl-1-oxobutan-2-yl)carbamate)

Item no.

USP-1A06170

Unit

25 mg

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USP-1A06190

Atazanavir Ethyl Analog (methyl ((6S,11S,12S,15S)-12-benzyl-6-(tert-butyl)-11-hydroxy-16,16-dimethyl-4,7,14-trioxo-9-(4-(pyridin-2-yl)benzyl)-3-oxa-5,8,9,13-tetraazaheptadecan-15-yl)carbamate)

Item no.

USP-1A06190

Unit

25 mg

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USP-1A06300

Bis-Acyclovir (Bis({9-[(2-hydroxyethoxy)methyl]guanine}-N2-yl)methane)

Item no.

USP-1A06300

Unit

25 mg

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USP-1A06310

Desvenlafaxine Benzyl Ether (1-(1-(4-(benzyloxy)phenyl)-2-(dimethylamino)ethyl)cyclohexan-1-ol)

Item no.

USP-1A06310

Unit

25 mg

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USP-1A06360

Sorafenib Isopropyl Carbamate (Isopropyl {4-[2-(methylcarbamoyl)pyridin-4-yl]oxyphenyl}carbamate)

Item no.

USP-1A06360

Unit

25 mg

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USP-1A06440

Exemestane 6alpha-epoxide ((6S,8R,9S,10R,13S,14S)-10,13-dimethyl-7,8,9,10,11,12,13,14,15,16-decahydrospiro [cyclopenta[a]phenanthrene-6,2'-oxirane]-3,17-dione)

Item no.

USP-1A06440

Unit

25 mg

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USP-1A06510

Atazanavir amine analog methyl ((S)-1-(((2S,3S)-4-(2-((S)-2-amino-3,3-dimethylbutanoyl)-1-(4-(pyridin-2-yl)benzyl)hydrazinyl)-3-hydroxy-1-phenylbutan-2-yl)amino)-3,3-dimethyl-1-oxobutan-2-yl)carbamate)

Item no.

USP-1A06510

Unit

25 mg

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USP-1A06550

6-Ketofluticasone propionate

Item no.

USP-1A06550

Unit

25 mg

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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-1A06600

Methylphenothiazine Sulfoxide (10-Methyl-10H-phenothiazine Sulfoxide)

Item no.

USP-1A06600

Unit

25 mg

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USP-1A06630

Dehydroargatroban Trifluoroacetate ((2R,4R)-4-Methyl-1-{[(3-methylquinolin-8-yl)sulfonyl]-L-arginyl}piperidine-2-carboxylic acid Trifluoroacetate)

Item no.

USP-1A06630

Unit

25 mg

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USP-1A06740

Cidofovir Sodium Uracil Analog ((S)-(((1-(2,4-dioxo-3,4-dihydropyrimidin-1(2H)-yl)-3-hydroxypropan-2-yl)oxy)methyl)phosphonate, sodium salt)

Item no.

USP-1A06740

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-1A06790

Desmethyl Ipratropium ((1R,3r,5S)-8-Isopropyl-8-azabicyclo[3.2.1]octan-3-yl 3-hydroxy-2-phenylpropanoate)

Item no.

USP-1A06790

Unit

25 mg

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USP-1A06810

Fluoroloratadine (Ethyl 4-(8-chloro-11-fluoro-6,11-dihydro-5H-benzo[5,6]cyclohepta[1,2-b]pyridin-11-yl)-1-piperidinecarboxylate)

Item no.

USP-1A06810

Unit

25 mg

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USP-1A06820

Montelukast Sulfoxide ([1-[[[1-[3-[(E)-2-(7-Chloroquinolin-2-yl)ethenyl]phenyl]-3-[2-(1-hydroxy -1methylethyl)phenyl]propyl]sulfinyl]methyl]cyclopropyl]acetic acid)

Item no.

USP-1A06820

Unit

25 mg

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USP-1A06840

Mycophenolate Mofetil N-Oxide (2-Morpholinoethyl (E)-6-(1,3-dihydro-4-hydroxy-6-methoxy-7-methyl-3-oxo-5-isobenzofuranyl)-4-methyl-4-hexenoate N-oxide)

Item no.

USP-1A06840

Unit

25 mg

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USP-1A06890

Hexyl Undecyl Pyranone ((S)-3-Hexyl-6-undecyl-5,6-dihydro-2H-pyran-2-one)

Item no.

USP-1A06890

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-1A07030

Protocatechuicaldehyde (3,4-Dihydroxybenzaldehyde)

Item no.

USP-1A07030

Unit

25 mg

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USP-1A07050

Ezetimibe meta-Fluoroaniline isomer ((3R,4S)-1-(3-Fluorophenyl)-3-[(3S)-3-(4-fluorophenyl)-3-hydroxypropyl]-4-(4-hydroxyphenyl)-2-azetidinone)

Item no.

USP-1A07050

CAS Number

[1700622-06-5]

Unit

25 mg

Molecular formula

C24H21F2NO3

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USP-1A07060

Eltrombopag Ethyl Ester (ethyl (Z)-3'-(2-(1-(3,4-dimethylphenyl)-3-methyl-5-oxo-1,5-dihydro-4H-pyrazol-4-ylidene)hydrazinyl)-2'-hydroxy-[1,1'-biphenyl]-3-carboxylate)

Item no.

USP-1A07060

Unit

25 mg

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USP-1A07090

Epoxy Mometasone Furoate ((9beta, 11beta, 16alpha)-21-Chloro-9,11-epoxy-17-[(2-furanylcarbonyl)oxy]-16-methylpregna-1,4-diene-3,20-dione)

Item no.

USP-1A07090

Unit

25 mg

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USP-1A07140

Desmethyl Fenofibrate (3-[4-(4-Chlorobenzoyl)phenoxy]-2-butanone, (3RS)-3-[4-(4-Chlorobenzoyl)phenoxy]butan-2-one)

Item no.

USP-1A07140

Unit

25 mg

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USP-1A07160

4-Chloro rac-Sertraline Hydrochloride (rel-(1R,4R)-4-(4-chlorophenyl)-N-methyl-1,2,3,4-tetrahydronaphthalen-1-amine hydrochloride)

Item no.

USP-1A07160

Unit

25 mg

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USP-1A07210

N-Benzyl Formoterol (N-(5-((RS)-2-(benzyl((RS)-1-(4-methoxyphenyl)propan-2-yl)amino)-1-hydroxyethyl)-2-hydroxyphenyl)formamide)

Item no.

USP-1A07210

Unit

25 mg

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USP-1A07230

Alprazolam Quinoline Derivative (7-chloro-1-methyl-5-phenyl[1,2,4]triazolo[4,3-a]quinolin-4-amine)

Item no.

USP-1A07230

Unit

10 mg

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USP-1A07250

Chlorhexidine Guanidine Trifluoroacetate (1-[6-(Carbamimidoylamino)hexyl]-5-(4-chlorophenyl)biguanide trifluoroacetate)

Item no.

USP-1A07250

Unit

25 mg

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USP-1A07340

Ezetimibe 2-Fluorobenzene Isomer ((3R,4S)-1-(4-fluorophenyl)-3-((S)-3-(2-fluorophenyl)-3-hydroxypropyl)-4-(4-hydroxyphenyl)azetidin-2-one)

Item no.

USP-1A07340

CAS Number

[2743547-96-6]

Unit

25 mg

Molecular formula

C24H21F2NO3

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USP-1A07350

Ezetimibe Ketone ((3R,4S)-1-(4-Fluorophenyl)-3-[3-(4-fluorophenyl)-3-oxopropyl]-4-(4-hydroxyphenyl)azetidin-2-one)

Item no.

USP-1A07350

CAS Number

[191330-56-0]

Unit

25 mg

Molecular formula

C24H19F2NO3

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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-1A07390

(5Z)-Didehydro Pioglitazone ((Z)-5-{4-[2-(5-Ethylpyridin-2-yl)ethoxy]benzylidene}thiazolidine-2,4-dione)

Item no.

USP-1A07390

Unit

25 mg

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USP-1A07660

2-Pyridineethanol (2-(Pyridin-2-yl)ethanol)

Item no.

USP-1A07660

Unit

25 mg

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