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Pharmaceutical Reference Standards

USP - United States Pharmacopeia Pharmaceutical Analytical Impurities

1028 products found

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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-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-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-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-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-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-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-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-1A01560

Chlorothiophene Aldehyde (5-chlorothiophene-2-carbaldehyde)

Item no.

USP-1A01560

CAS Number

[7283-96-7]

Unit

25 mg

Molecular formula

C5H3ClOS

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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-1A01730

Clopidogrel Ethyl Ester Sulfate (ethyl (S)-2-(2-chlorophenyl)-2-(6,7-dihydrothieno[3,2-c]pyridin-5(4H)-yl)acetate, sulfate)

Item no.

USP-1A01730

CAS Number

[1332612-57-3]

Unit

25 mg

Molecular formula

C17H18ClNO2S. H2O4S

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USP-1A01740

Desfluorociprofloxacin Hydrochloride (1-cyclopropyl-4-oxo-7-(piperazin-1-yl)-1,4-dihydroquinoline-3-carboxylic acid, hydrochloride)

Item no.

USP-1A01740

CAS Number

[2727369-47-1]

Unit

25 mg

Molecular formula

C17H19N3O3. 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-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-1A01830

Isobutylglutarmonoamide (R-isomer) ((R)-3-(2-amino-2-oxoethyl)-5-methylhexanoic acid)

Item no.

USP-1A01830

CAS Number

[181289-33-8]

Unit

25 mg

Molecular formula

C9H17NO3

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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-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-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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USP-1A02000

Budesonide Pyruvic Acid (2-((6aR,6bS,7S,8aS,8bS,11aR,12aS,12bS)-7-hydroxy-6a,8a-dimethyl-4-oxo-10-propyl-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-oxoacetic acid)

Item no.

USP-1A02000

CAS Number

[n/a]

Unit

25 mg

Molecular formula

C25H32O7

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USP-1A02220

Levetiracetam Crotonamide ((Z)-2-(2-oxopyrrolidin-1-yl)but-2-enamide)

Item no.

USP-1A02220

CAS Number

[358629-47-7]

Unit

10 mg

Molecular formula

C8H12N2O2

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