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Pharmaceutical Reference Standards

USP - United States Pharmacopeia Pharmaceutical Analytical Impurities

992 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-1A00080

3'-De(dimethylamino)-3'-oxoazithromycin

Item no.

USP-1A00080

CAS Number

[612069-25-7]

Unit

25 mg

Molecular formula

C36H65NO13

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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-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-1A07960

N-3-Oxocarboxypentyl Vinylpyrrolidinone Lithium

Item no.

USP-1A07960

Unit

25 mg

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USP-1A07990

Methoxydibenzazepine (10-Methoxy-5H-Dibenz[b,f]azepine)

Item no.

USP-1A07990

CAS Number

[4698-11-7]

Unit

25 mg

Molecular formula

C15H13NO

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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-1A08080

N-Benzyl Adrenalone (2-[Benzyl(methyl)amino]-1-(3,4-dihydroxyphenyl)ethan-1-one)

Item no.

USP-1A08080

Unit

25 mg

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USP-1A08110

Flunixin Ethyl Ester (Ethyl 2-((2-methyl-3-(trifluoromethyl)phenyl)amino)nicotinate)

Item no.

USP-1A08110

Unit

25 mg

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USP-1A08150

Haloperidol Octanoate Hydrochloride (4-(4-Chlorophenyl)-1-[4-(4-fluorophenyl)-4-oxobutyl]piperidin-4-yl octanoate hydrochloride)

Item no.

USP-1A08150

Unit

25 mg

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USP-1A08170

Modafinil Methyl Ester (2-[(Diphenylmethyl)sulfinyl]acetic acid methyl ester)

Item no.

USP-1A08170

Unit

25 mg

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USP-1A08220

7-O-Acetylpaclitaxel

Item no.

USP-1A08220

Unit

25 mg

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USP-1A08230

Di-O-methyl Levodopa (3,4-Dimethoxy-L-phenylalanine)

Item no.

USP-1A08230

Unit

25 mg

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USP-1A08270

N-Methyl Pemetrexed ({4-[2-(2-Amino-1-methyl-4-oxo-4,7-dihydro-1H-pyrrolo[2,3-d]pyrimidin-5-yl)ethyl]benzoyl}-L-glutamic acid)

Item no.

USP-1A08270

Unit

25 mg

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USP-1A08300

10-Deacetylbaccatin III

Item no.

USP-1A08300

Unit

25 mg

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USP-1A08330

Ceftriaxone Triazine Analog (2-Methyl-3-thioxo-1,2,4-triazinane-5,6-dione, 3-Mercapto-2-methyl-1,2-dihydro-1,2,4-triazine-5,6-dione)

Item no.

USP-1A08330

Unit

25 mg

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USP-1A08340

Ceftriaxone Benzothiazolyloxime ((Z)-S-Benzothiazol-2-yl 2-(2-aminothiazol-4-yl)-2-(methoxyimino)thioacetate)

Item no.

USP-1A08340

Unit

25 mg

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USP-1A08430

Minoxidil Pyrimidine Analog (6-Chloropyrimidine-2,4-diamine)

Item no.

USP-1A08430

Unit

25 mg

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USP-1A08440

16alpha-Methylprednisone (17,21-Dihydroxy-16alpha-methylpregna-1,4-diene-3,11,20-trione)

Item no.

USP-1A08440

Unit

25 mg

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USP-1A08460

Estradiol-9-ene Valerate (3-Hydroxyestra-1,3,5(10),9(11)-tetraen-17beta-yl valerate)

Item no.

USP-1A08460

Unit

25 mg

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USP-1A08480

Succinyl Fluvoxamine ((E)-5-Methoxy-1-[4-(trifluoromethyl)phenyl]-1-pentanone O-[2-[(2-succinyl)amino]ethyl]oxime)

Item no.

USP-1A08480

Unit

25 mg

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USP-1A08510

Aminoethyl Desmethoxy Fluvoxamine Dihydrochloride ((E)-1-[4-(Trifluoromethyl)phenyl]pentan-1-one O-{2-[(2-aminoethyl)amino]ethyl} oxime dihydrochloride)

Item no.

USP-1A08510

Unit

25 mg

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USP-1A08560

Chloromethyl Olanzapinium Chloride (1-Chloromethyl-1-methyl-4-(2-methyl-10H-benzo[b]thieno[2,3-e][1,4]diazepin-4-yl)piperazin-1-ium chloride)

Item no.

USP-1A08560

Unit

25 mg

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USP-1A08600

rac-Naproxen Isopropyl Ester (Isopropyl 2-(6-methoxynaphthalen-2-yl)propanoate, Isopropyl 2-(6-methoxynaphthalen-2-yl)propionate)

Item no.

USP-1A08600

Unit

25 mg

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USP-1A08640

Formyl Leucine (N-Formyl-L-leucine)

Item no.

USP-1A08640

Unit

25 mg

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USP-1A08700

Dihydrocinchonidine ((R)-[(2S,4S,5R)-5-Ethylquinuclidin-2-yl](quinolin-4-yl)methanol)

Item no.

USP-1A08700

Unit

25 mg

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USP-1A09040

N-(2,6-Dimethylphenyl)-2-(4-nitrosopiperazin-1-yl)acetamide Solution (1 mg/mL in Methanol) (N-(2,6-Dimethylphenyl)-2-(4-nitrosopiperazin-1-yl)acetamide)

Item no.

USP-1A09040

Unit

1 mL

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USP-1A09110

N-Nitroso Perindopril Solution (1 mg/mL in Acetonitrile) ((2S,3aS,7aS)-1-(N-((S)-1-ethoxy-1-oxopentan-2-yl)-N-nitroso-L-alanyl)octahydro-1H-indole-2-carboxylic acid)

Item no.

USP-1A09110

Unit

1 mL

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USP-1A09700

N-Nitroso Desmethyl Chlorpheniramine Solution (1 mg/mL in Methanol) (N-(3-(4-chlorophenyl)-3-(pyridin-2-yl)propyl)-N-methylnitrous amide)

Item no.

USP-1A09700

Unit

1 mL

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USP-1A09800

N-Nitroso Desmethyl Diltiazem Solution (1 mg/mL in Acetonitrile) ((2S,3S)-2-(4-Methoxyphenyl)-5-{2-[methyl(nitroso)amino]ethyl}-4-oxo-2,3,4,5-tetrahydrobenzo[b][1,4]thiazepin-3-yl acetate)

Item no.

USP-1A09800

Unit

1 mL

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USP-1A09940

Depropylamino Hydroxy Propafenone

Item no.

USP-1A09940

Unit

25 mg

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USP-1A09950

Propafenone Glycidyl Analog

Item no.

USP-1A09950

Unit

25 mg

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USP-1A09970

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

Item no.

USP-1A09970

Unit

25 mg

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USP-1A09990

Item no.

USP-1A09990

Unit

25 mg

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USP-1A10000

Diclofenac Alcohol

Item no.

USP-1A10000

Unit

25 mg

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USP-1A10010

Indomethacin Hydrazine Analog (1-(4-Chlorobenzoyl)-1-(4-methoxyphenyl)-2-(4-chlorobenzoyl)hydrazide)

Item no.

USP-1A10010

Unit

25 mg

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USP-1A10020

O-Acetyl Iopamidol ((S)-5-[[2-(acetyloxy)-1-oxopropyl]amino]-N,N'-bis[2-hydroxy-1-(hydroxymethyl)ethyl]-2,4,6-triiodo-1,3-Benzenedicarboxamide)

Item no.

USP-1A10020

Unit

25 mg

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USP-1A10030

Promethazine Sulfoxide

Item no.

USP-1A10030

Unit

25 mg

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USP-1A10040

Rizatriptan N-Oxide (2-{5-[(1H-1,2,4-Triazol-1-yl)methyl]-1H-indol-3-yl}-N,N-dimethylethanamine oxide)

Item no.

USP-1A10040

Unit

25 mg

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USP-1A10050

Rizatriptan N-methyl Adduct Iodide

Item no.

USP-1A10050

Unit

25 mg

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USP-1A10070

Didehydroglycopyrrolate ( (3-[2-(Cyclopent-1-en-1-yl)-2-hydroxy-2-phenylacetoxy]-1,1-dimethylpyrrolidin-1-ium bromide)

Item no.

USP-1A10070

Unit

25 mg

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USP-1A10090

Deschloro Desloratadine Hydrochloride (6,11-Dihydro-11-(piperidin-4-ylidene)-5H-benzo[5,6]cyclohepta[1,2-b]pyridine hydrochloride)

Item no.

USP-1A10090

Unit

25 mg

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USP-1A10130

Dimethyl Felodipine (Dimethyl 4-(2,3-dichlorophenyl)-2,6-dimethyl-1,4-dihydropyridine-3,5-dicarboxylate)

Item no.

USP-1A10130

Unit

25 mg

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USP-1A10140

17alpha-Hydroxyprogesterone (17-Hydroxypregn-4-ene-3,20-dione)

Item no.

USP-1A10140

Unit

25 mg

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USP-1A10150

Pivaloyl Phenylglycine ((R)-2-Phenyl-2-pivalamidoacetic acid)

Item no.

USP-1A10150

Unit

25 mg

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USP-1A10160

Epoxy Betamethasone (9,11Beta-Epoxy-17,21-dihydroxy-16Beta-methyl-9Beta-pregna-1,4-diene-3,20-dione)

Item no.

USP-1A10160

Unit

25 mg

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USP-1A10200

Dicloxacillin Penilloic Acid ((4S)-2-{[3-(2,6-Dichlorophenyl)-5-methylisoxazole-4-carboxamido]methyl}-5,5-dimethylthiazolidine-4-carboxylic acid)

Item no.

USP-1A10200

Unit

25 mg

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USP-1A10220

1-Hydroxy-2-naphthoic Acid (1-Hydroxy-naphthalene-2-carboxylic acid)

Item no.

USP-1A10220

Unit

25 mg

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USP-1A10230

Sulfaguanidine (4-Amino-N-carbamimidoylbenzenesulfonamide)

Item no.

USP-1A10230

Unit

25 mg

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