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Pharmaceutical Reference Standards

USP - United States Pharmacopeia Pharmaceutical Analytical Impurities

861 products found

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USP-1A05230

N-Nitroso Paroxetine Solution (1 mg/mL in Methanol) ((3S,4R)-3-((benzo[d][1,3]dioxol-5-yloxy)methyl)-4-(4-fluorophenyl)-1-nitrosopiperidine)

Item no.

USP-1A05230

Unit

1 mL

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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-1A05460

6-Ethylpyrimidine-2,4-diamine (6-Ethylpyrimidine-2,4-diamine)

Item no.

USP-1A05460

Unit

25 mg

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USP-1A05480

Ethoxytrimethoprim Analog (5-(4-Ethoxy-3,5-dimethoxybenzyl)pyrimidin-2,4-diamine)

Item no.

USP-1A05480

Unit

25 mg

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USP-1A05510

Eudesmic Acid (3,4,5-Trimethoxybenzoic acid)

Item no.

USP-1A05510

Unit

25 mg

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USP-1A05530

Atracurium Iodide 3-Methylpentanediol Analog (2,2'-(((3-methylpentane-1,5-diyl)bis(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-1A05530

Unit

10 mg

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USP-1A05580

1,3-Bis(isopropylamino)propan-2-ol Dihydrochloride (1,3-bis(isopropylamino)propan-2-ol Dihydrochloride)

Item no.

USP-1A05580

Unit

25 mg

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USP-1A05850

Epinine Hydroiodide (4-(2-(Methylamino)ethyl)benzene-1,2-diol hydroiodide)

Item no.

USP-1A05850

Unit

25 mg

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USP-1A05930

Lithium Isopilocarpate (Lithium (2R,3R)-2-ethyl-4-hydroxy-3-((1-methyl-1H-imidazol-5-yl)methyl)butanoate)

Item no.

USP-1A05930

Unit

25 mg

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USP-1A05940

3-Chloro Sulfamethoxazole (4-amino-3-chloro-N-(5-methylisoxazol-3-yl)benzenesulfonamide)

Item no.

USP-1A05940

Unit

25 mg

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USP-1A05960

Nafcillin Penilloic Acid (2-[(2-Ethoxy-1-naphthamido)methyl]-5,5-dimethylthiazolidine-4-carboxylic acid)

Item no.

USP-1A05960

Unit

10 mg

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USP-1A06030

2-Acetylresorcinol (2-Acetylresorcinol, 1-(2,6-Dihydroxyphenyl)ethan-1-one)

Item no.

USP-1A06030

Unit

25 mg

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USP-1A06130

Rosuvastatin Ethyl Ester

Item no.

USP-1A06130

CAS Number

[851443-04-4]

Unit

25 mg

Molecular formula

C24H32FN3O6S

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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-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-1A06220

N-Formyl Docetaxel

Item no.

USP-1A06220

Unit

25 mg

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USP-1A06320

Butrol Sodium (rel-10-[(1R,2S)-2,3-dihydroxy-1-(hydroxymethyl)propyl]-1,4,7,10-tetraazacyclododecane-1,4,7-triacetic acid, sodium salt)

Item no.

USP-1A06320

CAS Number

[2447549-29-1]

Unit

10 mg

Molecular formula

C18H31N4O9. 3 Na

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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-1A06390

Atazanavir Ditertbutyl Analog (tert-butyl 2-((2S,3S)-3-((tert-butoxycarbonyl)amino)-2-hydroxy-4-phenylbutyl)-2-(4-(pyridin-2-yl)benzyl)hydrazine-1-carboxylate)

Item no.

USP-1A06390

Unit

25 mg

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USP-1A06420

11Beta-Epoxydexamethasone (9,11Beta-Epoxy-17,21-dihydroxy-16alpha-methylpregna-1,4-diene-3,20-dione)

Item no.

USP-1A06420

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-1A06450

Exemestane 6beta-epoxide ((6R,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-1A06450

Unit

25 mg

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USP-1A06470

4-Chloro Bupropion Hydrochloride (2-(tert-Butylamino)-1-(3,4-dichlorophenyl)propan-1-one hydrochloride)

Item no.

USP-1A06470

Unit

25 mg

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USP-1A06480

Atazanavir Dipeptide Analog (methyl ((5S,8S,13S,14S,17S)-14-benzyl-5,8-di-tert-butyl-13-hydroxy-18,18-dimethyl-3,6,9,16-tetraoxo-11-(4-(pyridin-2-yl)benzyl)-2-oxa-4,7,10,11,15-pentaazanonadecan-17-yl)carbamate)

Item no.

USP-1A06480

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-1A06940

Tamsulosin Amine ((R)-5-(2-Aminopropyl)-2-methoxybenzenesulfonamide)

Item no.

USP-1A06940

CAS Number

[112101-81-2]

Unit

25 mg

Molecular formula

C10H16N2O3S

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USP-1A06950

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

Item no.

USP-1A06950

Unit

25 mg

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USP-1A06990

Montelukast Bis-Sulfide (1-[[[(1R)-1-[3-[1-[[[1-(carboxymethyl)cyclopropyl]methyl]thio]-2-(7-chloro-2-quinolinyl)ethyl]phenyl]-3-[2-(1-hydroxy-1-methylethyl)phenyl]propyl]thio]methyl]-Cyclopropaneacetic acid)

Item no.

USP-1A06990

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-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-1A07110

Anastrozole Diacid (2,2'-(5-((1H-1,2,4-triazol-1-yl)methyl)-1,3-phenylene)bis(2-methylpropanoic acid))

Item no.

USP-1A07110

Unit

25 mg

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USP-1A07170

Z-Montelukast ([1-[[[(1R)-1-[3-[(Z)-2-(7-Chloroquinolin-2-yl)ethenyl]phenyl]-3-[2-(1-hydroxy-1-methylethyl)phenyl]propyl]sulfanyl]methyl]cyclopropyl]acetic acid)

Item no.

USP-1A07170

Unit

25 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-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-1A07440

Buspirone Open Ring Dimer (4-[4-(Pyrimidin-2-yl)piperazin-1-yl]butyl2-{1-[2-oxo-2-({4-[4-(pyrimidin-2-yl)piperazin-1-yl]butyl}amino)ethyl]cyclopentyl}acetate)

Item no.

USP-1A07440

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-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

Unit

25 mg

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USP-1A07760

4-N-Desacetyl-5-N-acetyl Oseltamivir ((3R,4R,5S)-4-Amino-5-acetylamino-3-(1-ethylpropoxy)-1-cyclohexene-1-carboxylic acid ethyl ester)

Item no.

USP-1A07760

Unit

25 mg

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USP-1A07800

1-Fluoronaphthalene (alpha-Fluoronaphthalene)

Item no.

USP-1A07800

Unit

25 mg

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USP-1A07810

4-Chloro Omeprazole (2-[(RS)-[4-Chloro-3,5-dimethylpyridin-2-yl)methyl]sulfinyl]-5-methoxy-1H-benzimidazole)

Item no.

USP-1A07810

Unit

25 mg

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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-1A07870

N-(1,2-Dicarboxyethyl) Rosiglitazone (2-(5-{[4-({2-[Methyl(2-pyridinyl)amino]ethyl}oxy)phenyl]methyl}-2,4-dioxo-1,3-thiazolidin-3-yl)butanedioic acid)

Item no.

USP-1A07870

Unit

25 mg

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USP-1A07900

2,3-Isosertraline Hydrochloride ((1RS,4RS)-4-(2,3-dichlorophenyl)-N-methyl-1,2,3,4-tetrahydronaphthalen-1-amine hydrochloride)

Item no.

USP-1A07900

Unit

10 mg

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USP-1A07910

Mutilin (3aS,4R,5S,6S,8R,9R,9aR,10R)-6-Ethenyloctahydro-5,8-dihydroxy-4,6,9,10-tetramethyl-3a,9-propano-3aH-cyclopentacycloocten-1(4H)-one)

Item no.

USP-1A07910

Unit

25 mg

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