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Pharmaceutical Reference Standards

USP - United States Pharmacopeia Pharmaceutical Analytical Impurities

1209 products found

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USP-1A00490

Amoxicilloic Acid Dimers 1 and 2

Item no.

USP-1A00490

CAS Number

[2088961-38-8]

Unit

10 mg

Molecular formula

C32H40N6O11S2

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USP-1A00790

Atorvastatin Calcium Epoxy Pyrrolooxazin 7-Hydroxy Analog (Calcium 4-(1b-(4-fluorophenyl)-7-hydroxy-7-isopropyl-1a-phenyl-7a-(phenylcarbamoyl)hexahydro-3H-oxireno[2',3':3,4]pyrrolo[2,1-b][1,3]oxazin-3-yl)-3-hydroxybutanoate)

Item no.

USP-1A00790

CAS Number

[n/a]

Unit

25 mg

Molecular formula

C66H68CaF2N4O14 (2C33H34CFN2O7.Ca)

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USP-1A00820

Atorvastatin Pyrrolidone Lactone (5-(4-Fluorophenyl)-1-{2-[(2R,4R)-4-hydroxy-6-oxotetrahydro-2H-pyran-2-yl]ethyl}-3-isopropyl-2-oxo-N,4-diphenyl-2,3-dihydro-1H-pyrrole-3-carboxamide)

Item no.

USP-1A00820

CAS Number

[906552-19-0]

Unit

25 mg

Molecular formula

C33H33FN2O5

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USP-1A01400

6Beta-Hydroxybudesonide ((2R,6aR,6bS,7S,8aS,8bS,11aR,12aS,12bS)-2,7-dihydroxy-8b-(2-hydroxyacetyl)-6a,8a-dimethyl-10-propyl-1,2,6a,6b,7,8,8a,8b,11a,12,12a,12b-dodecahydro-4H-naphtho[2',1':4,5]indeno[1,2-d][1,3]dioxol-4-one)

Item no.

USP-1A01400

CAS Number

[88411-77-2]

Unit

25 mg

Molecular formula

C25H34O7

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USP-1A01850

Tetrahydrothienopyridine Hydrochloride (4,5,6,7-Tetrahydrothieno[3,2-c]pyridine, hydrochloride)

Item no.

USP-1A01850

CAS Number

[28783-41-7]

Unit

25 mg

Molecular formula

C7H9NS. HCl

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USP-1A02040

(4-Methylbenzoyl)trifluoroacetone (1,1,1-Trifluoro-4-hydroxy-4-(4-methylphenyl)-3-buten-2-one)

Item no.

USP-1A02040

CAS Number

[910303-54-7]

Unit

25 mg

Molecular formula

C11H9F3O2

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USP-1A02070

7-Dehydrocholesterol (COLD SHIPMENT REQUIRED) ((3S,9S,10R,13R,14R,17R)-10,13-dimethyl-17-((R)-6-methylheptan-2-yl)-2,3,4,9,10,11,12,13,14,15,16,17-dodecahydro-1H-cyclopenta[a]phenanthren-3-ol)

Item no.

USP-1A02070

CAS Number

[434-16-2]

Unit

25 mg

Molecular formula

C27H44O

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USP-1A02200

Duloxetine Regioisomer (2-(2-(3-(methylamino)propyl)thiophen-3-yl)naphthalen-1-ol)

Item no.

USP-1A02200

CAS Number

[940291-11-2]

Unit

25 mg

Molecular formula

C18H19NOS

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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-1A02460

Aripiprazole 4,4'-dimer (7,7'-((((ethane-1,1-diylbis(2,3-dichloro-4,1-phenylene))bis(piperazine-4,1-diyl))bis(butane-4,1-diyl))bis(oxy))bis(3,4-dihydroquinolin-2(1H)-one)

Item no.

USP-1A02460

CAS Number

[1797986-18-5]

Unit

25 mg

Molecular formula

C48H56Cl4N6O4

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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-1A02570

3-Dechloro Aripiprazole (7-(4-(4-(2-chlorophenyl)piperazin-1-yl)butoxy)-3,4-dihydroquinolin-2(1H)-one)

Item no.

USP-1A02570

CAS Number

[203395-81-7]

Unit

25 mg

Molecular formula

C23H28ClN3O2

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USP-1A02590

1,4-Bis(4-(2,3-dichlorophenyl)piperazin-1-yl)butane dihydrochloride (1,4-bis(4-(2,3-dichlorophenyl)piperazin-1-yl)butane, hydrochloride)

Item no.

USP-1A02590

CAS Number

[n/a]

Unit

25 mg

Molecular formula

C24H30Cl4N4. 2 HCl

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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-1A02760

3-Carboxyphenylacetonitrile (3-(Cyanomethyl)benzoic acid)

Item no.

USP-1A02760

CAS Number

[5689-33-8]

Unit

25 mg

Molecular formula

C9H7NO2

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USP-1A02780

2,4,5-Trimethylketoprofen (COLD SHIPMENT REQUIRED) ((2RS)-2-[3-(2,4,5-Trimethylbenzoyl)phenyl]propanoic Acid)

Item no.

USP-1A02780

CAS Number

[1797984-80-5]

Unit

25 mg

Molecular formula

C19H20O3

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USP-1A02810

Desmethyl Promethazine Hydrochloride (N-methyl-1-(10H-phenothiazin-10-yl)propan-2-amine, hydrochloride)

Item no.

USP-1A02810

CAS Number

[60113-77-1]

Unit

25 mg

Molecular formula

C16H18N2S. HCl

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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-1A02910

Benzoylphenylacetonitrile (3-Benzoylbenzeneacetonitrile)

Item no.

USP-1A02910

CAS Number

[21288-34-6]

Unit

25 mg

Molecular formula

C15H11NO

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USP-1A03070

Piperazinedionecarbonyl D-phenylglycylglycine ((R)-(2-(4-ethyl-2,3-dioxopiperazine-1-carboxamido)-2-phenylacetyl) glycine)

Item no.

USP-1A03070

CAS Number

[2170771-47-6]

Unit

25 mg

Molecular formula

C17H20N4O6

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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-1A03220

(S)-2-Amino-4-morpholinobutanoic acid hydrochloride ((S)-2-amino-4-morpholinobutanoic acid, hydrochloride)

Item no.

USP-1A03220

CAS Number

[n/a]

Unit

25 mg

Molecular formula

C8H16N2O3. HCl

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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-1A03260

Dibenzazepinodione (5H-dibenzo[b,f]azepine-10,11-dione)

Item no.

USP-1A03260

CAS Number

[19579-83-0]

Unit

50 mg

Molecular formula

C14H9NO2

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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-1A03350

Methyl Varenicline (rel-(6S,10R)-2-methyl-7,8,9,10-tetrahydro-6H-6,10-methanoazepino[4,5-g]quinoxaline)

Item no.

USP-1A03350

Unit

25 mg

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USP-1A03360

N-Methyl Varenicline (7,8,9,10-tetrahydro-8-methyl-6,10-Methano-6H-pyrazino[2,3-h][3]benzazepine)

Item no.

USP-1A03360

Unit

25 mg

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USP-1A03390

N-Formyl Lenalidomide (N-(2-(2,6-dioxopiperidin-3-yl)-1-oxoisoindoIin-4-yl)formamide)

Item no.

USP-1A03390

Unit

25 mg

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USP-1A03470

O-Acetyl Bosentan (2-((6-((4-(tert-butyl)phenyl)sulfonamido)-5-(2-methoxyphenoxy)-[2,2'-bipyrimidin]-4-yl)oxy)ethyl acetate)

Item no.

USP-1A03470

Unit

25 mg

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USP-1A03480

Bosentan Bis4(tert-butylbenzenesulfonamide) (N,N'-(5-(2-methoxyphenoxy)-[2,2'-bipyrimidine]-4,6-diyl)bis(4-(tert-butyl)benzenesulfonamide))

Item no.

USP-1A03480

Unit

25 mg

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USP-1A03490

(1S,2R)-Eliglustat Diastereomer (N-[(1S,2R)-2-(2,3-Dihydro-1,4-benzodioxin-6-yl)-2-hydroxy-1-(1-pyrrolidinylmethyl)ethyl]octanamide)

Item no.

USP-1A03490

Unit

25 mg

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USP-1A03520

3-Deoxy-3-acetyl Abiraterone-3-ene

Item no.

USP-1A03520

Unit

25 mg

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USP-1A04030

N-Nitroso Rasagiline Solution (1 mg/mL in Methanol) ((R)-N-(2,3-Dihydro-1H-inden-1-yl)-N-(prop-2-yn-1-yl)nitrous amide)

Item no.

USP-1A04030

Unit

1 mL

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USP-1A04070

N-Nitrosoiminodiacetic acid Solution (1 mg/mL in Acetonitrile) (2,2'-(nitrosoazanediyl)diacetic acid)

Item no.

USP-1A04070

Unit

1 mL

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USP-1A04240

N-Nitroso Labetalol Solution (1 mg/mL in Methanol) (2-hydroxy-5-(1-hydroxy-2-(nitroso(4-phenylbutan-2-yl)amino)ethyl) benzamide)

Item no.

USP-1A04240

Unit

1 mL

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USP-1A04350

N-Nitroso Varenicline (NNV) (8-nitroso-7,8,9,10-tetrahydro-6H-6,10-methanoazepino[4,5-g]quinoxaline)

Item no.

USP-1A04350

Unit

10 mg

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USP-1A04600

N-Alkyl Brexpiprazole (7-(4-(4-(benzo[b]thiophen-4-yl)piperazin-1-yl)butoxy)-1-(4-((2-oxo- 1,2- dihydroquinolin-7-yl)oxy)butyl)quinolin-2(1H)-one)

Item no.

USP-1A04600

Unit

25 mg

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USP-1A04630

Fluticasone Propionate Thioacid ((6alpha,11Beta,16alpha,17alpha)-6,9-Difluoro-11-hydroxy-16-methyl-3-oxo-17-(1-oxopropoxy)androsta-1,4-diene-17-carbothioic acid)

Item no.

USP-1A04630

Unit

25 mg

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USP-1A04660

Fluticasone Oxathiolane

Item no.

USP-1A04660

Unit

25 mg

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USP-1A04730

Tolvaptan Open Ring Hydroxyacid (4-(5-chloro-2-(2-methyl-4-(2-methylbenzamido)benzamido)phenyl)-4-hydroxybutanoic acid)

Item no.

USP-1A04730

Unit

25 mg

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USP-1A04760

Rac-Trans-4-Hydroxy Tolvaptan (rel-N-(4-((4S,5S)-7-chloro-4,5-dihydroxy-2,3,4,5-tetrahydro-1H-benzo[b]azepine-1-carbonyl)-3-methylphenyl)-2-methylbenzamide)

Item no.

USP-1A04760

Unit

10 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-1A04820

4-Phenylbutyl(benzyl)amine hydrochloride (N-benzyl-4-phenylbutan-1-amine, hydrochloride)

Item no.

USP-1A04820

Unit

25 mg

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USP-1A04850

2-(Chloromethyl)-4-methylquinazoline (Quinazoline, 2-(chloromethyl)-4-methyl)

Item no.

USP-1A04850

Unit

25 mg

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USP-1A04880

3-Methyl-7-(2-butyn-1-yl)-8-bromoxanthine (8-bromo-7-(but-2-yn-1-yl)-3-methyl-3,7-dihydro-1H-purine-2,6-dione)

Item no.

USP-1A04880

Unit

25 mg

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USP-1A04960

endo-Lurasidone ((3aR,4R,7S,7aS)-2-{[1R,2R]-2-[4-(1,2-benzisothiazol-3-yl)-piperazin-1-yl-methyl]-cyclohexyl methyl}hexahydro-4,7-methano-2H-isoindole-1,3-dione)

Item no.

USP-1A04960

Unit

25 mg

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USP-1A05090

Emtricitabine Sulfoxide (4-Amino-5-fluoro-1-((2R,5S)-2-(hydroxymethyl)-3-oxido-1,3-oxathiolan-5-yl)pyrimidin-2(1H)-one)

Item no.

USP-1A05090

Unit

25 mg

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