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Pharmaceutical Reference Standards

USP - United States Pharmacopeia Pharmaceutical Analytical Impurities

1025 products found

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USP-1A02320

Pregabalin Diethylamide D-Tartrate ((S)-3-(Aminomethyl)-N,N-diethyl-5-methylhexanamide (2S,3S)-2,3-dihydroxysuccinate)

Item no.

USP-1A02320

Unit

25 mg

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USP-1A02380

rac-Pregabalin Imide Dimer Amide (3-((3-(aminomethyl)-5-methylhexanamido)methyl)-5-methylhexanoic acid)

Item no.

USP-1A02380

CAS Number

[1486961-58-3]

Unit

25 mg

Molecular formula

C16H32N2O3

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USP-1A02390

Mannityl Amlodipine (3-Ethyl 5-methyl 4-(2-chlorophenyl)-6-methyl-2-((2-(((2R,3R,4R,5R)-2,3,4,5,6-pentahydroxyhexyl)amino)ethoxy)methyl)-1,4-dihydropyridine-3,5-dicarboxylate)

Item no.

USP-1A02390

CAS Number

[n/a]

Unit

25 mg

Molecular formula

C26H37ClN2O10

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USP-1A02540

Aripiprazole Spiro Analog (8-(2,3-dichlorophenyl)-5,8-diazaspiro[4.5]decan-5-ium, bromide)

Item no.

USP-1A02540

CAS Number

[795313-24-5]

Unit

25 mg

Molecular formula

C14H19Cl2N2. Br

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USP-1A02550

Aripiprazole Hydroxydihydroquinolinone Analog (7-hydroxy-3,4-dihydroquinolin-2(1H)-one)

Item no.

USP-1A02550

CAS Number

[22246-18-0]

Unit

25 mg

Molecular formula

C9H9NO2

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USP-1A02600

Sitagliptin Phenylcrotonyl Analog ((E)-1-{3-(Trifluoromethyl)-5,6-dihydro-[1,2,4]triazolo[4,3-a]pyrazin-7(8H)-yl}-4-(2,4,5-trifluorophenyl)but-2-en-1-one)

Item no.

USP-1A02600

CAS Number

[1253056-18-6]

Unit

25 mg

Molecular formula

C16H12F6N4O

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USP-1A02650

Sitagliptin Enamine ((Z)-3-amino-1-(3-(trifluoromethyl)-5,6-dihydro-[1,2,4]triazolo[4,3-a]pyrazin-7(8H)-yl)-4-(2,4,5-trifluorophenyl)but-2-en-1-one)

Item no.

USP-1A02650

CAS Number

[767340-03-4]

Unit

25 mg

Molecular formula

C16H13F6N5O

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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-1A02690

E-Cefepime (1-({(6R,7R)-7-[(E)-2-(2-Aminothiazol-4-yl)-2-(methoxyimino)acetamido]-2-carboxy-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-en-3-yl}methyl)-1-methylpyrrolidinium chloride)

Item no.

USP-1A02690

Unit

25 mg

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USP-1A02730

21-Desacetyl Deflazacort (11Beta,16Beta)-11,21-Dihydroxy-2'-methyl-5'H-pregna-1,4-dieno[17,16-d]oxazole-3,20-dione)

Item no.

USP-1A02730

CAS Number

[13649-57-5]

Unit

25 mg

Molecular formula

C23H29NO5

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USP-1A02750

2-(3-Carboxyphenyl)propionitrile (2-(3-Carboxyphenyl)propionitrile)

Item no.

USP-1A02750

CAS Number

[5537-71-3]

Unit

25 mg

Molecular formula

C10H9NO2

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USP-1A02770

Dimethylketoprofen (COLD SHIPMENT REQUIRED) ((2RS)-2-[3-(2,4-Dimethylbenzoyl)phenyl]propanoic Acid)

Item no.

USP-1A02770

Unit

25 mg

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USP-1A02830

2,4-Difluoro Sitagliptin ((3R)-3-Amino-4-(2,4-difluorophenyl)-1-[3-(trifluoromethyl)-5,6-dihydro[1,2,4]triazolo[4,3-a]pyrazin-7(8H)-yl]butan-1-one)

Item no.

USP-1A02830

CAS Number

[945261-48-3]

Unit

25 mg

Molecular formula

C16H16F5N5O

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USP-1A02840

Sitagliptin Acid ((R)-3-Amino-4-(2,4,5-trifluorophenyl)butanoic acid)

Item no.

USP-1A02840

CAS Number

[936630-57-8]

Unit

25 mg

Molecular formula

C10H10F3NO2

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USP-1A02860

(R)-N-Methyllaudanosine Iodide ((R)-1-(3,4-dimethoxybenzyl)-6,7-dimethoxy-2,2-dimethyl-1,2,3,4-tetrahydroisoquinolin-2-ium, iodide)

Item no.

USP-1A02860

CAS Number

[41431-32-7]

Unit

25 mg

Molecular formula

C22H30INO4

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USP-1A02880

Atracurium Iodide Quaternary Alcohol Acetate ((1R)-2-(3-((5-acetoxypentyl)oxy)-3-oxopropyl)-1-(3,4-dimethoxybenzyl)-6,7-dimethoxy-2-methyl-1,2,3,4-tetrahydroisoquinolin-2-ium, iodide)

Item no.

USP-1A02880

Unit

25 mg

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USP-1A02890

Guanylmelamine Dinitrate (1-(4,6-diamino-1,3,5-triazin-2-yl)guanidine, nitrate)

Item no.

USP-1A02890

CAS Number

[27369-26-2]

Unit

25 mg

Molecular formula

C4H8N8. 2 HNO3

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USP-1A02910

Benzoylphenylacetonitrile (3-Benzoylbenzeneacetonitrile)

Item no.

USP-1A02910

CAS Number

[21288-34-6]

Unit

25 mg

Molecular formula

C15H11NO

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USP-1A02920

1-Oxo Ivabradine Hydrochloride ((S)-3-(3-(((3,4-dimethoxybicyclo[4.2.0]octa-1(6),2,4-trien-7-yl)methyl)(methyl)amino)propyl)-7,8-dimethoxy-4,5-dihydro-1H-benzo[d]azepine-1,2(3H)-dione, hydrochloride)

Item no.

USP-1A02920

CAS Number

[1616710-50-9]

Unit

25 mg

Molecular formula

C27H34N2O6. HCl

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USP-1A02950

4-Desmethyl Ivabradine Hydrochloride ((S)-3-(3-(((4-hydroxy-3-methoxybicyclo[4.2.0]octa-1(6),2,4-trien-7-yl)methyl)(methyl)amino)propyl)-7,8-dimethoxy-1,3,4,5-tetrahydro-2H-benzo[d]azepin-2-one, hydrochloride)

Item no.

USP-1A02950

CAS Number

[n/a]

Unit

25 mg

Molecular formula

C26H34N2O5. HCl

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USP-1A02970

7-Desmethyl Ivabradine ((S)-3-(3-(((3,4-dimethoxybicyclo[4.2.0]octa-1(6),2,4-trien-7-yl)methyl)(methyl)amino)propyl)-7-hydroxy-8-methoxy-1,3,4,5-tetrahydro-2H-benzo[d]azepin-2-one)

Item no.

USP-1A02970

CAS Number

[304462-60-0]

Unit

25 mg

Molecular formula

C26H34N2O5

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USP-1A02980

Dehydro Ivabradine ((S)-3-(3-(((3,4-dimethoxybicyclo[4.2.0]octa-1(6),2,4-trien-7-yl)methyl)(methyl)amino)propyl)-7,8-dimethoxy-1,3-dihydro-2H-benzo[d]azepin-2-one)

Item no.

USP-1A02980

CAS Number

[1086026-31-4]

Unit

25 mg

Molecular formula

C27H34N2O5

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USP-1A03040

Desfluoro (3S,4R)-Paroxol (((3S,4R)-1-methyl-4-phenylpiperidin-3-yl)methanol)

Item no.

USP-1A03040

CAS Number

[176022-03-0]

Unit

25 mg

Molecular formula

C13H19NO

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USP-1A03060

Paroxol ((4R,3S)-4-(4-Fluorophenyl)-1-methyl-3-piperidinemethanol)

Item no.

USP-1A03060

CAS Number

[105812-81-5]

Unit

25 mg

Molecular formula

C13H18FNO

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USP-1A03110

Hydroxy Ivabradine (3-(3-hydroxypropyl)-7,8-dimethoxy-1,3,4,5-tetrahydro-2H-benzo[d]azepin-2-one)

Item no.

USP-1A03110

CAS Number

[1235547-07-5]

Unit

25 mg

Molecular formula

C15H21NO4

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USP-1A03120

Ivabradine R-Enantiomer Hydrochloride ((R)-3-(3-(((3,4-dimethoxybicyclo[4.2.0]octa-1(6),2,4-trien-7-yl)methyl)(methyl)amino)propyl)-7,8-dimethoxy-1,3,4,5-tetrahydro-2H-benzo[d]azepin-2-one, hydrochloride)

Item no.

USP-1A03120

CAS Number

[148849-68-7]

Unit

25 mg

Molecular formula

C27H36N2O5. HCl

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USP-1A03130

Ivabradine Open Ring ((S)-2-(2-(2-((3-(((3,4-dimethoxybicyclo[4.2.0]octa-1(6),2,4-trien-7-yl)methyl)(methyl)amino)propyl)amino)ethyl)-4,5-dimethoxyphenyl)acetic acid)

Item no.

USP-1A03130

CAS Number

[1462470-54-7]

Unit

25 mg

Molecular formula

C27H38N2O6

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USP-1A03150

Ivabradine Chloroveratryl Analog Hydrochloride (3-(3-((3-chloro-2-(3,4-dimethoxyphenyl)propyl)(methyl)amino)propyl)-7,8-dimethoxy-1,3,4,5-tetrahydro-2H-benzo[d]azepin-2-one, hydrochloride)

Item no.

USP-1A03150

CAS Number

[n/a]

Unit

25 mg

Molecular formula

C27H37ClN2O5. HCl

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USP-1A03160

Ivabradine Bisbenzazepine Analog (3,3'-(propane-1,3-diyl)bis(7,8-dimethoxy-1,3,4,5-tetrahydro-2H-benzo[d]azepin-2-one))

Item no.

USP-1A03160

CAS Number

[2731089-65-7]

Unit

25 mg

Molecular formula

C27H34N2O6

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USP-1A03250

Monochlorotriiodothyronine ((S)-2-Amino-3-[3-chloro-4-(4-hydroxy-3,5-diiodophenoxy)-5-iodophenyl]propanoic acid)

Item no.

USP-1A03250

CAS Number

[909279-46-5]

Unit

25 mg

Molecular formula

C15H11ClI3NO4

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USP-1A03310

O-Desmethylmetoprolol (1-(4-(2-hydroxyethyl)phenoxy)-3-(isopropylamino)propan-2-ol)

Item no.

USP-1A03310

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-1A03370

Varenicline Acetamide (COLD SHIPMENT REQUIRED) (1-(6,7,9,10-tetrahydro-8H-6,10-methanoazepino[4,5-g]quinoxalin-8-yl)ethan-1-one)

Item no.

USP-1A03370

Unit

25 mg

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USP-1A03440

Abiraterone Ethyl Ether (3-((3S,8R,9S,10R,13S,14S)-3-ethoxy-10,13-dimethyl-2,3,4,7,8,9,10,11,12,13,14,15-dodecahydro-1H-cyclopenta[a]phenanthren-17-yl)pyridine)

Item no.

USP-1A03440

Unit

25 mg

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USP-1A03450

Abiraterone Isopropyl Ether (3-((3S,8R,9S,10R,13S,14S)-3-isopropoxy-10,13-dimethyl-2,3,4,7,8,9,10,11,12,13,14,15-dodecahydro-1H-cyclopenta[a]phenanthren-17-yl)pyridine, 3beta-Isopropoxy-17-(pyridin-3-yl)androsta-5,16-diene)

Item no.

USP-1A03450

Unit

25 mg

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USP-1A03530

3-Deoxy 3-Chloroabiraterone (3Beta-Chloro-17-(pyridin-3-yl)androsta-5,16-diene)

Item no.

USP-1A03530

Unit

25 mg

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USP-1A03560

Fingolimod hexyl homolog (2-amino-2-(4-hexylphenethyl)propane-1,3-diol)

Item no.

USP-1A03560

CAS Number

[1201794-93-5]

Unit

25 mg

Molecular formula

C17H29NO2

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USP-1A03570

Fingolimod decyl homolog (2-amino-2-(4-decylphenethyl)propane-1,3-diol)

Item no.

USP-1A03570

CAS Number

[780729-32-0]

Unit

25 mg

Molecular formula

C21H37NO2

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USP-1A03580

6-Keto Fulvestrant ((7Alpha,17Beta)-7-[9-[4,4,5,5,5-pentafluoropentyl)sulfinyl]nonyl]-3,17Beta-dihydroxyestra-1,3,5(10)-trien-6-one, 7Alpha-{9-[(4,4,5,5,5,-Pentafluoropentyl)sulfinyl]nonyl}estra-1,3,5(10)-triene-6-one-3,17Beta-diol)

Item no.

USP-1A03580

Unit

25 mg

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USP-1A03590

5-Chloro Hydrochlorothiazide (5,6-dichloro-3,4-dihydro-2H-benzo[e][1,2,4]thiadiazine-7-sulfonamide 1,1-dioxide)

Item no.

USP-1A03590

CAS Number

[5233-42-1]

Unit

25 mg

Molecular formula

C7H7Cl2N3O4S2

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USP-1A03620

N-Methyl Lenalidomide (3-(4-(methylamino)-1-oxoisoindolin-2-yl)piperidine-2,6-dione)

Item no.

USP-1A03620

CAS Number

[2197421-58-0]

Unit

25 mg

Molecular formula

C14H15N3O3

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USP-1A03650

Anhydroclarithromycin

Item no.

USP-1A03650

Unit

25 mg

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USP-1A03670

Fulvestrant sulfone ((7R,8R,9S,13S,14S,17S)-13-methyl-7-(9-((4,4,5,5,5-pentafluoropentyl)sulfonyl)nonyl)7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthrene-3,17-diol)

Item no.

USP-1A03670

Unit

25 mg

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USP-1A03810

Rifamycin O (4-O-(Carboxymethyl)-1-deoxy-1,4-dihydro-4-hydroxy-1-oxo-rifamycin gamma-Lactone)

Item no.

USP-1A03810

Unit

25 mg

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USP-1A03820

Vilanterol Desethylene Homolog Triphenylacetate ((R)-4-(2-((6-((2,6-dichlorobenzyl)oxy)hexyl)amino)-1-hydroxyethyl)-2-(hydroxymethyl)phenol, 2,2,2-triphenylacetate)

Item no.

USP-1A03820

Unit

25 mg

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USP-1A03840

2,5-Dichloro Vilanterol Trifenatate Isomer ((R)-4-(2-((6-(2-((2,5-dichlorobenzyl)oxy)ethoxy)hexyl)amino)-1-hydroxyethyl)-2-(hydroxymethyl)phenol, 2,2,2-triphenylacetate)

Item no.

USP-1A03840

Unit

25 mg

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USP-1A04020

1-Methyl-4-nitrosopiperazine (MNP) Solution (1 mg/mL in Methanol) (1-Methyl-4-nitrosopiperazine)

Item no.

USP-1A04020

CAS Number

[16339-07-4]

Unit

1 mL

Molecular formula

C5H11N3O

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USP-1A04080

1-(2-Methoxyphenyl)-4-nitrosopiperazine Solution (1 mg/mL in Methanol) (1-(2-Methoxyphenyl)-4-nitrosopiperazine)

Item no.

USP-1A04080

Unit

1 mL

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USP-1A04100

4-Nitrosopiperazine-1-ethanol Solution (1 mg/mL in Methanol) (2-(4-Nitrosopiperazin-1-yl)ethan-1-ol)

Item no.

USP-1A04100

Unit

1 mL

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USP-1A04190

1-Cyclopentyl-4-nitrosopiperazine (CPNP) Solution (1 mg/mL in Methanol) (1-Cyclopentyl-4-nitrosopiperazine)

Item no.

USP-1A04190

Unit

1 mL

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