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Pharmaceutical Reference Standards

USP - United States Pharmacopeia Pharmaceutical Analytical Impurities

992 products found

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USP-1A00910

Celecoxib Open Ring (4-((1,1,1-trifluoro-4-hydroxy-4-(p-tolyl)but-3-en-2-ylidene)amino)benzenesulfonamide)

Item no.

USP-1A00910

CAS Number

[n/a]

Unit

25 mg

Molecular formula

C17H15F3N2O3S

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USP-1A00930

Methyl p-Toluate (Methyl 4-methylbenzoate)

Item no.

USP-1A00930

CAS Number

[99-75-2]

Unit

25 mg

Molecular formula

C9H10O2

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USP-1A00950

Duloxetine beta-Naphthol-1-yl Isomer (2-(3-(Methylamino)-1-(thiophen-2-yl)propyl)naphthalen-1-ol)

Item no.

USP-1A00950

CAS Number

[1033803-59-6]

Unit

50 mg

Molecular formula

C18H19NOS

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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-1A01030

1,2-Dihydro Fluticasone Propionate

Item no.

USP-1A01030

CAS Number

[105613-90-9]

Unit

25 mg

Molecular formula

C25H33F3O5S

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USP-1A01040

11-Ketofluticasone Propionate ((6S,8S,9R,10S,13S,14S,16R,17R)-6,9-Difluoro-17-(((fluoromethyl)thio)carbonyl)-10,13,16-trimethyl-3,11-dioxo-6,7,8,9,10,11,12,13,14,15,16,17-dodecahydro-3H-cyclopenta[a]phenanthren-17-yl propionate)

Item no.

USP-1A01040

CAS Number

[1219174-94-3]

Unit

25 mg

Molecular formula

C25H29F3O5S

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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-1A01060

6-Methyl-4-phenylchromanone (6-Methyl-4-phenylchroman-2-one)

Item no.

USP-1A01060

CAS Number

[40546-94-9]

Unit

25 mg

Molecular formula

C16H14O2

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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-1A01090

Monoiodoamiodarone ((2-Butylbenzofuran-3-yl){4-[2-(diethylamino)ethoxy]-3-iodophenyl}methanone)

Item no.

USP-1A01090

CAS Number

[85642-08-6]

Unit

50 mg

Molecular formula

C25H30INO3

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USP-1A01130

Fluticasone Propionate Trisulfide

Item no.

USP-1A01130

CAS Number

[960071-64-1]

Unit

25 mg

Molecular formula

C48H58F4O10S3

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USP-1A01150

Pemetrexed Glutamide Sodium ((S)-4-((S)-4-(4-(2-(2-amino-4-oxo-4,7-dihydro-3H-pyrrolo[2,3-d]pyrimidin-5-yl)ethyl)benzamido)-4-carboxybutanamido)-4-carboxybutanoate, sodium salt)

Item no.

USP-1A01150

CAS Number

[144051-68-3] (free acid)

Unit

25 mg

Molecular formula

C25H27N6O9. Na

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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-1A01230

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

Item no.

USP-1A01230

CAS Number

[131918-73-5]

Unit

25 mg

Molecular formula

C21H26O6

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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-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-1A01350

Bis(2-methylaminoethyl) Ether (2,2'-oxybis(N,N-dimethylethan-1-amine))

Item no.

USP-1A01350

CAS Number

[3033-62-3]

Unit

25 mg

Molecular formula

C8H20N2O

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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-1A01380

Clopidogrel Quaternary Salt (5-(1-(2-chlorophenyl)-2-methoxy-2-oxoethyl)-6,7-dihydrothieno[3,2-c]pyridin-5-ium, bromide)

Item no.

USP-1A01380

CAS Number

[2418591-12-3]

Unit

25 mg

Molecular formula

C16H15ClNO2S. Br

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USP-1A01390

6alpha-Hydroxybudesonide ((2S,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-1A01390

CAS Number

[577777-51-6]

Unit

25 mg

Molecular formula

C25H34O7

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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-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-1A01510

Rivaroxaban Desthiophene Analog ((R)-4-(4-(5-(aminomethyl)-2-oxooxazolidin-3-yl)phenyl)morpholin-3-one)

Item no.

USP-1A01510

CAS Number

[1411775-06-8]

Unit

25 mg

Molecular formula

C14H17N3O4

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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-1A01600

Diphthalimido Morpholinone Analog (2,2'-((2R,2'R)-((4-(3-oxomorpholino)phenyl)azanediyl)bis(2-hydroxypropane-3,1-diyl))bis(isoindoline-1,3-dione))

Item no.

USP-1A01600

CAS Number

[1643354-27-1]

Unit

25 mg

Molecular formula

C32H30N4O8

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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-1A01640

Tolyloyl Propionic Acid (4-Oxo-4-(p-tolyl)butanoic Acid)

Item no.

USP-1A01640

CAS Number

[4619-20-9]

Unit

25 mg

Molecular formula

C11H12O3

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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-1A01690

Ticlopidine Pyridinium Bromide Analog (5-(2-chlorobenzyl)-6,7-dihydrothieno[3,2-c]pyridin-5-ium, bromide)

Item no.

USP-1A01690

CAS Number

[801319-16-4] (free base)

Unit

25 mg

Molecular formula

C14H13ClNS. Br

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USP-1A01700

Clopidogrel Open Ring Hydrochloride (methyl (S)-2-(2-chlorophenyl)-2-((2-(thiophen-2-yl)ethyl)amino) acetate, hydrochloride)

Item no.

USP-1A01700

CAS Number

[141109-19-5]

Unit

25 mg

Molecular formula

C15H16ClNO2S.HCl

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USP-1A01750

Desfluorocitalopram Oxalate (1-(3-(dimethylamino)propyl)-1-phenyl-1,3-dihydroisobenzofuran-5-carbonitrile, oxalate)

Item no.

USP-1A01750

CAS Number

[1093072-86-6]

Unit

25 mg

Molecular formula

C20H22N2O C2H2O4

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USP-1A01760

Escitalopram Open Ring (4-[4-(Dimethylamino)-1-(4-fluorophenyl)-1-hydroxybutyl]-3-(hydroxymethyl)benzonitrile)

Item no.

USP-1A01760

CAS Number

[103146-25-4]

Unit

25 mg

Molecular formula

C20H23FN2O2

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USP-1A01770

5-Dimethylaminobutyryl Citalopram Oxalate (4-(dimethylamino)-1-(1-(3-(dimethylamino)propyl)-1-(4-fluorophenyl)-1,3-dihydroisobenzofuran-5-yl)butan-1-one, oxalate)

Item no.

USP-1A01770

CAS Number

[n/a]

Unit

25 mg

Molecular formula

C25H33FN2O2. 2 C2H2O4

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USP-1A01810

N-Benzylacetamide (N-Acetylbenzylamine)

Item no.

USP-1A01810

CAS Number

[588-46-5]

Unit

25 mg

Molecular formula

C9H11NO

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USP-1A01840

Isobutylglutarmonoamide (3-(2-Amino-2-oxoethyl)-5-methylhexanoic Acid)

Item no.

USP-1A01840

CAS Number

[181289-15-6]

Unit

25 mg

Molecular formula

C9H17NO3

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USP-1A01860

Clopidogrel Amide ((S)-2-(2-chlorophenyl)-2-(6,7-dihydrothieno[3,2-c]pyridin-5(4H)-yl)acetamide)

Item no.

USP-1A01860

CAS Number

[444728-13-6]

Unit

25 mg

Molecular formula

C15H15ClN2OS

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USP-1A01870

Clopidogrel R-Enantiomer ((R)-2-(2-chlorophenyl)-2-(6,7-dihydrothieno[3,2-c]pyridin-5(4H)-yl)acetamide)

Item no.

USP-1A01870

CAS Number

[444728-15-8]

Unit

25 mg

Molecular formula

C15H15ClN2OS

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USP-1A01890

Clopidogrel N-Oxide (5-((S)-1-(2-chlorophenyl)-2-methoxy-2-oxoethyl)-4,5,6,7-tetrahydrothieno[3,2-c]pyridine 5-oxide)

Item no.

USP-1A01890

CAS Number

[1319197-71-1]

Unit

25 mg

Molecular formula

C16H16ClNO3S

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USP-1A01900

Clopidogrel Open Ring R-enantiomer (methyl (R)-2-(2-chlorophenyl)-2-((2-(thiophen-2-yl)ethyl)amino) acetate, hydrochloride)

Item no.

USP-1A01900

CAS Number

[1258938-54-3]

Unit

25 mg

Molecular formula

C15H16ClNO2S. HCl

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USP-1A01910

Iodofluticasone Propionate

Item no.

USP-1A01910

CAS Number

[80474-67-5]

Unit

25 mg

Molecular formula

C25H31F2IO5S

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USP-1A01920

Fexofenadine N-oxide (1-(4-(4-(2-carboxypropan-2-yl)phenyl)-4-hydroxybutyl)-4-(hydroxydiphenylmethyl)piperidine 1-oxide)

Item no.

USP-1A01920

CAS Number

[1422515-52-3]

Unit

25 mg

Molecular formula

C32H39NO5

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