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Pharmaceutical Reference Standards

USP - United States Pharmacopeia Pharmaceutical Analytical Impurities

791 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-1A00030

Amlodipine Methyl Analog (dimethyl 2-((2-aminoethoxy)methyl)-4-(2-chlorophenyl)-6-methyl-1,4-dihydropyridine-3,5-dicarboxylate, maleate)

Item no.

USP-1A00030

CAS Number

[400024-11-5]

Unit

25 mg

Molecular formula

C19H23ClN2O5 · C4H4O4

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USP-1A00110

6Beta-Hydroxy Ethinyl Estradiol ((6R,8R,9S,13S,14S,17R)-17-ethynyl-13-methyl-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthrene-3,6,17-triol)

Item no.

USP-1A00110

CAS Number

[56324-28-8]

Unit

25 mg

Molecular formula

C20H24O3

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USP-1A00120

Fluoroandrostadiene Carboxylic Acid ((8S,9R,10S,11S,13S,14S,16R,17R)-9-fluoro-11,17-dihydroxy-10,13,16-trimethyl-3-oxo-6,7,8,9,10,11,12,13,14,15,16,17-dodecahydro-3H-cyclopenta[a]phenanthrene-17-carboxylic acid)

Item no.

USP-1A00120

CAS Number

[37927-01-8]

Unit

25 mg

Molecular formula

C21H27FO5

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USP-1A00250

Donepezil quaternary salt (donepezilbenzyl Bromide) (1,1-dibenzyl-4-((5,6-dimethoxy-1-oxo-2,3-dihydro-1H-inden-2-yl)methyl)piperidin-1-ium, bromide)

Item no.

USP-1A00250

CAS Number

[844694-85-5]

Unit

25 mg

Molecular formula

C31H36BrNO3

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USP-1A00840

3'-Demethyl-3'-N-[(4-methylphenyl)sulfonyl]azithromycin

Item no.

USP-1A00840

CAS Number

[612069-31-5]

Unit

25 mg

Molecular formula

C44H76N2O14S

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USP-1A00850

Azithromycin B (3-deoxyazithromycin) (COLD SHIPMENT REQUIRED)

Item no.

USP-1A00850

CAS Number

[307974-61-4]

Unit

25 mg

Molecular formula

C38H72N2O11

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USP-1A00860

Azithromycin C (3''-O-demethylazithromycin)

Item no.

USP-1A00860

CAS Number

[620169-47-3]

Unit

25 mg

Molecular formula

C37H70N2O12

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USP-1A00890

Carvedilol Bisalkylpyrocatechol derivative (3,3'-{2,2'-[1,2-Phenylenebis(oxy)]bis(ethane-2,1-diyl)}bis(azanediyl)bis(1-(9H-carbazol-4-yloxy)propan-2-ol))

Item no.

USP-1A00890

CAS Number

[1346602-98-9]

Unit

25 mg

Molecular formula

C40H42N4O6

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USP-1A00980

Fexofenadine Chloro Analog (Methyl 4-(4-Chloro-1-oxobutyl)-alpha,alpha-dimethylphenylacetate)

Item no.

USP-1A00980

CAS Number

[154477-54-0]

Unit

25 mg

Molecular formula

C15H19ClO3

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USP-1A00990

Decarboxy Moxifloxacin (1-Cyclopropyl-6-fluoro-8-methoxy-7-[(4aS,7aS)-octahydro-6H-pyrrolo[3,4-b]pyridin-6-yl]-4-oxo-1,4-dihydroquinoline) (COLD SHIPMENT REQUIRED)

Item no.

USP-1A00990

CAS Number

[1322062-57-6]

Unit

25 mg

Molecular formula

C20H24FN3O2

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USP-1A01010

Olanzapine lactam ((Z)-4-(4-methylpiperazin-1-yl)-3-(2-oxopropylidene)-1,3-dihydro-2H-benzo[b][1,4]diazepin-2-one)

Item no.

USP-1A01010

CAS Number

[1017241-34-7]

Unit

25 mg

Molecular formula

C17H20N4O2

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USP-1A01020

Olanzapine thiolactam ((Z)-1-(4-(4-Methylpiperazin-1-yl)-2-thioxo-1,2-dihydro-3H-benzo[b][1,4]diazepin-3-ylidene)propan-2-one)

Item no.

USP-1A01020

CAS Number

[1017241-36-9]

Unit

25 mg

Molecular formula

C17H20N4OS

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USP-1A01050

6-Methyl-4-phenylchromanol (6-Methyl-4-phenylchroman-2-ol)

Item no.

USP-1A01050

CAS Number

[209747-04-6]

Unit

25 mg

Molecular formula

C16H16O2

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USP-1A01080

Desethylamiodarone (2-Butyl-3-benzofuranyl-4-[2-(ethylamino)ethoxy]-3,5-diiodophenyl Ketone Hydrochloride)

Item no.

USP-1A01080

CAS Number

[96027-74-6]

Unit

25 mg

Molecular formula

C23H26ClI2NO3

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USP-1A01100

Deoxystreptamine Kanosaminide (6-O-(3-Amino-3-deoxy-alpha-D-glucopyranosyl)-2-deoxy-D-streptamine)

Item no.

USP-1A01100

CAS Number

[20744-51-8]

Unit

25 mg

Molecular formula

C12H25N3O7

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USP-1A01190

Rivaroxaban N-acyl glycolic acid ((S)-2-(2-(5-chloro-N-(4-(5-((5-chlorothiophene-2-carboxamido)methyl)-2-oxooxazolidin-3-yl)phenyl)thiophene-2-carboxamido)ethoxy)acetic acid)

Item no.

USP-1A01190

CAS Number

[1151893-81-0]

Unit

25 mg

Molecular formula

C24H21Cl2N3O7S2

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USP-1A01200

Rosuvastatin Lactone (N-[4-(4-Fluorophenyl)-5-{(E)-2-[(2S,4R)-4-hydroxy-6-oxotetrahydro-2H-pyran-2-yl]vinyl}-6-isopropylpyrimidin-2-yl]-N-methylmethanesulfonamide)

Item no.

USP-1A01200

CAS Number

[503610-43-3]

Unit

25 mg

Molecular formula

C22H26FN3O5S

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USP-1A01250

16Alpha-Hydroxy-11-keto Prednisolone (8S,9S,10R,13S,14S,16R,17S)-16,17-dihydroxy-17-(2-hydroxyacetyl)-10,13-dimethyl-7,8,9,10,12,13,14,15,16,17-decahydro-3H-cyclopenta[a]phenanthrene-3,11(6H)-dione)

Item no.

USP-1A01250

CAS Number

[3754-05-0]

Unit

25 mg

Molecular formula

C21H26O6

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USP-1A01260

16Alpha-Hydroxy Prednisolone-9(11)-ene ((8S,10S,13S,14S,16R,17S)-16,17-dihydroxy-17-(2-hydroxyacetyl)-10,13-dimethyl-6,7,8,10,12,13,14,15,16,17-decahydro-3Hcyclopenta[a]phenanthren-3-one)

Item no.

USP-1A01260

CAS Number

[39672-76-9]

Unit

25 mg

Molecular formula

C21H26O

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USP-1A01270

16Alpha-Hydroxy Prednisolone-9(11)-ene Acetate (2-((8S,10S,13S,14S,16R,17S)-16,17-dihydroxy-10,13-dimethyl-3-oxo-6,7,8,10,12,13,14,15,16,17-decahydro-3H-cyclopenta[a]phenanthren-17-yl)-2-oxoethyl acetate)

Item no.

USP-1A01270

CAS Number

[77017-20-0]

Unit

25 mg

Molecular formula

C23H28O6

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USP-1A01280

16Alpha-Hydroxy Prednisolone-9(11)-ene Diacetate (2-((8S,10S,13S,14S,16R,17S)-16-acetoxy-17-hydroxy-10,13-dimethyl-3-oxo-6,7,8,10,12,13,14,15,16,17-decahydro-3H-cyclopenta[a]phenanthren-17-yl)-2-oxoethyl acetate)

Item no.

USP-1A01280

CAS Number

[95943-95-6]

Unit

25 mg

Molecular formula

C25H30O7

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USP-1A01290

TEMED Dihydrochloride (N1,N1,N2,N2-tetramethylethane-1,2-diamine, hydrochloride)

Item no.

USP-1A01290

CAS Number

[7677-21-6]

Unit

25 mg

Molecular formula

C6H16N2·2HCl

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USP-1A01300

Bis(dimethylaminoethyl) Ether Dihydrochloride (2,2'-oxybis(N,N-dimethylethan-1-amine), hydrochloride)

Item no.

USP-1A01300

CAS Number

[103526-47-2]

Unit

25 mg

Molecular formula

C8H20N2O·2HCl

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USP-1A01310

tert-Octylamine (2,4,4-trimethylpentan-2-amine)

Item no.

USP-1A01310

CAS Number

[107-45-9]

Unit

25 mg

Molecular formula

C8H19N

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USP-1A01320

Dimethylethylamine Hydrochloride (N,N-dimethylethanamine, hydrochloride)

Item no.

USP-1A01320

CAS Number

[58114-25-3]

Unit

25 mg

Molecular formula

C4H11N·HCl

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USP-1A01330

Bis(2-methylaminoethyl) Ether Hydrochloride (2,2'-oxybis(N-methylethan-1-amine), hydrochloride)

Item no.

USP-1A01330

CAS Number

[295796-12-2]

Unit

25 mg

Molecular formula

C6H16N2O·2HCl

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USP-1A01340

2,3-Dimethyl-2,3-butanediamine Dihydrochloride (2,3-dimethylbutane-2,3-diamine, hydrochloride)

Item no.

USP-1A01340

CAS Number

[75804-28-3]

Unit

25 mg

Molecular formula

C6H16N2·2HCl

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USP-1A01360

Clopidogrel-Beta-D-glucuronide ((2S,3S,4S,5R,6S)-6-((S)-2-(2-chlorophenyl)-2-(6,7-dihydrothieno[3,2-c]pyridin-5(4H)-yl)acetoxy)-3,4,5-trihydroxytetrahydro-2H-pyran-2-carboxylic acid)

Item no.

USP-1A01360

CAS Number

[1314116-53-4]

Unit

10 mg

Molecular formula

C21H22ClNO8S

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USP-1A01420

Desonide 21-Acetate (2-((6aR,6bS,7S,8aS,8bS,11aR,12aS,12bS)-7-Hydroxy-6a,8a,10,10-tetramethyl-4-oxo-1,2,4,6a,6b,7,8,8a,11a,12,12a,12b-dodecahydro-8bH-naphtho[2',1':4,5]indeno[1,2-d][1,3]dioxol-8b-yl)-2-oxoethyl acetate)

Item no.

USP-1A01420

CAS Number

[25092-25-5]

Unit

25 mg

Molecular formula

C26H34O7

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USP-1A01450

Chloro N-methylthiophene Carboxamide (5-chloro-N-methylthiophene-2-carboxamide)

Item no.

USP-1A01450

CAS Number

[97799-98-9]

Unit

25 mg

Molecular formula

C6H6ClNOS

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USP-1A01460

Rivaroxaban Open Chain Dithiophene Analog ((S)-5-chloro-N-(4-(5-((5-chlorothiophene-2-carboxamido)methyl)-2-oxooxazolidin-3-yl)phenyl)-N-(2-(2-(methylamino)-2-oxoethoxy)ethyl)thiophene-2-carboxamide)

Item no.

USP-1A01460

CAS Number

[1807455-76-0]

Unit

10 mg

Molecular formula

C25H24Cl2N4O6S2

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USP-1A01470

Rivaroxaban Desmorpholinone Analog ((S)-5-chloro-N-((3-(4-((2-hydroxyethyl)amino)phenyl)-2-oxooxazolidin-5-yl)methyl)thiophene-2-carboxamide)

Item no.

USP-1A01470

CAS Number

[936232-22-3]

Unit

25 mg

Molecular formula

C17H18ClN3O4S

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USP-1A01480

Desthiophenerivaroxaban Methylcarbamate Analog (methyl ((2-oxo-3-(4-(3-oxomorpholino)phenyl)oxazolidin-5-yl)methyl)carbamate)

Item no.

USP-1A01480

CAS Number

[1838139-08-4]

Unit

25 mg

Molecular formula

C16H19N3O6

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USP-1A01490

Methylisoindolinedione (2-methylisoindoline-1,3-dione)

Item no.

USP-1A01490

CAS Number

[550-44-7]

Unit

25 mg

Molecular formula

C9H7NO2

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USP-1A01500

Desthiophenerivaroxaban Phthalimodo Analog ((R)-2-((2-oxo-3-(4-(3-oxomorpholino)phenyl)oxazolidin-5-yl)methyl)isoindoline-1,3-dione)

Item no.

USP-1A01500

CAS Number

[1424944-35-3]

Unit

25 mg

Molecular formula

C22H19N3O6

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USP-1A01520

Rivaroxaban N-methylphthalamido Analog ((S)-N1-methyl-N2-((2-oxo-3-(4-(3-oxomorpholino)phenyl)oxazolidin-5-yl)methyl)phthalamide)

Item no.

USP-1A01520

CAS Number

[2206360-74-7]

Unit

25 mg

Molecular formula

C23H24N4O6

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USP-1A01530

Aminophenylmorpholinone (4-(4-aminophenyl)morpholin-3-one)

Item no.

USP-1A01530

CAS Number

[438056-69-0]

Unit

25 mg

Molecular formula

C10H12N2O2

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USP-1A01540

(S)-Glycidyl Phthalimide ((S)-2-(oxiran-2-ylmethyl)isoindoline-1,3-dione)

Item no.

USP-1A01540

CAS Number

[161596-47-0]

Unit

25 mg

Molecular formula

C11H9NO3

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USP-1A01570

Rivaroxaban Phthalimido Analog ((R)-2-(2-hydroxy-3-((4-(3-oxomorpholino)phenyl)amino)propyl) isoindoline-1,3-dione)

Item no.

USP-1A01570

CAS Number

[446292-07-5]

Unit

25 mg

Molecular formula

C21H21N3O5

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USP-1A01580

Dichlorothiophene Carboxylic Acid (3,5-dichlorothiophene-2-carboxylic acid)

Item no.

USP-1A01580

CAS Number

[89166-94-9]

Unit

25 mg

Molecular formula

C5H2Cl2O2S

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USP-1A01590

Nitrophenylchlorothiophene Carboxylate (4-nitrophenyl 5-chlorothiophene-2-carboxylate)

Item no.

USP-1A01590

CAS Number

[1450877-56-1]

Unit

25 mg

Molecular formula

C11H6ClNO4S

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USP-1A01620

Tolterodine Dimer (2,2'-((isopropylazanediyl)bis(1-phenylpropane-3,1-diyl))bis(4-methylphenol))

Item no.

USP-1A01620

CAS Number

[854306-72-2]

Unit

25 mg

Molecular formula

C35H41NO2

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USP-1A01630

Tolyloyl Propionamide (N,N-Dimethyl-4-oxo-4-(p-tolyl)butanamide)

Item no.

USP-1A01630

CAS Number

[402470-91-1]

Unit

25 mg

Molecular formula

C13H17NO2

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USP-1A01650

3-Hydroxy Desloratadine (8-chloro-11-(piperidin-4-ylidene)-6,11-dihydro-5H-benzo[5,6] cyclohepta[1,2-b]pyridin-3-ol)

Item no.

USP-1A01650

CAS Number

[119410-08-1]

Unit

25 mg

Molecular formula

C19H19ClN2O

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USP-1A01660

N-Hydroxy Desloratadine (4-(8-Chloro-5,6-dihydro-benzo[5,6]cyclohepta[1,2-b]pyridin-11-ylidene)-piperidin-1-ol)

Item no.

USP-1A01660

CAS Number

[1193725-73-3]

Unit

25 mg

Molecular formula

C19H19ClN2O

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USP-1A01670

N-Acetyl Desloratadine (1-[4-(8-Chloro-5,6-dihydro-11H-benzo[5,6]cyclohepta[1,2-b]pyridin-11-ylidene)-1-piperidinyl]ethanone)

Item no.

USP-1A01670

CAS Number

[117796-52-8]

Unit

25 mg

Molecular formula

C21H21ClN2O

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USP-1A07430

2-Vinylpyridine (2-Ethenylpyridine)

Item no.

USP-1A07430

Unit

25 mg

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USP-1A07590

rac-Dutasteride Dimethylamide ((5alpha, 17beta)-N,N-Dimethyl-3-oxo-4-azaandrost-1-ene-17-carboxamide)

Item no.

USP-1A07590

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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