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Pharmaceutical Reference Standards

USP - United States Pharmacopeia Pharmaceutical Analytical Impurities

1209 products found

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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-1A01440

Ticlopidine Pyridinium Analog (5-(2-chlorobenzyl)thieno[3,2-c]pyridin-5-ium, chloride)

Item no.

USP-1A01440

CAS Number

[53885-64-6]

Unit

25 mg

Molecular formula

C14H11Cl2NS

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USP-1A01550

Rivaroxaban Open Ring S-isomer ((S)-5-chloro-N-(2-hydroxy-3-((4-(3-oxomorpholino)phenyl)amino)propyl)thiophene-2-carboxamide)

Item no.

USP-1A01550

CAS Number

[1325210-62-5]

Unit

25 mg

Molecular formula

C18H20ClN3O4S

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USP-1A01680

Tolterodine Propanol Analog (2-(3-Hydroxy-1-phenylpropyl)-4-methylphenol)

Item no.

USP-1A01680

CAS Number

[851789-43-0]

Unit

25 mg

Molecular formula

C16H18O2

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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-1A01800

Lacosamide Acrylamide Analog (2-Acetamido-N-benzylacrylamide)

Item no.

USP-1A01800

CAS Number

[86921-49-5]

Unit

25 mg

Molecular formula

C12H14N2O2

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USP-1A01820

Ureidolacosamide ((R)-N-Benzyl-2-(3-benzylureido)-3-methoxypropanamide)

Item no.

USP-1A01820

CAS Number

[2295925-90-3]

Unit

25 mg

Molecular formula

C19H23N3O3

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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-1A01970

(R)-Amlodipine 3-ethyl 5-methyl (R)-2-((2-aminoethoxy)methyl)-4-(2-chlorophenyl)-6-methyl-1,4-dihydropyridine-3,5-dicarboxylate)

Item no.

USP-1A01970

CAS Number

[103129-81-3]

Unit

25 mg

Molecular formula

C20H25ClN2O5

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USP-1A02010

17alpha-Hydroxy13(17)a-homoprednisolone ((2R,3R,4aS,4bS,10aR,10bS,11S,12aS)-2,3,11-trihydroxy-2-(hydroxymethyl)-10a,12a-dimethyl-3,4,4a,5,6,10a,10b,11,12,12a-decahydrochrysene-1,8(2H,4bH)-dione)

Item no.

USP-1A02010

CAS Number

[n/a]

Unit

25 mg

Molecular formula

C21H28O6

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USP-1A02110

rac-Clopidogrel Acid N-Oxide (5-(carboxy(2-chlorophenyl)methyl)-4,5,6,7-tetrahydrothieno[3,2-c]pyridine 5-oxide)

Item no.

USP-1A02110

CAS Number

[n/a]

Unit

25 mg

Molecular formula

C15H14ClNO3S

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USP-1A02130

Desloratadine N-oxide (8-Chloro-6,11-dihydro-11-(4-piperidinylidene)-5H-benzo[5,6]cyclohepta[1,2-b]pyridine 1-Oxide)

Item no.

USP-1A02130

CAS Number

[169253-26-3]

Unit

25 mg

Molecular formula

C19H19ClN2O

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USP-1A02180

rac-Duloxetine-d7 Maleate (N-methyl-3-((naphthalen-1-yl-d7)oxy)-3-(thiophen-2-yl)propan-1-amine, maleate)

Item no.

USP-1A02180

Unit

25 mg

Molecular formula

C18H12D7NOS. C4H4O4

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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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USP-1A02230

Pemetrexed Tromethamide (N2-(4-(2-(2-amino-4-oxo-4,7-dihydro-3H-pyrrolo[2,3-d]pyrimidin-5-yl)ethyl)benzoyl)-N5-(1,3-dihydroxy-2-(hydroxymethyl)propan-2-yl)-L-glutamine)

Item no.

USP-1A02230

CAS Number

[n/a]

Unit

25 mg

Molecular formula

C24H30N6O

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USP-1A02250

Rivaroxaban Ethyl Carbamate (ethyl (4-(3-oxomorpholino)phenyl)carbamate)

Item no.

USP-1A02250

CAS Number

[1327778-39-1]

Unit

25 mg

Molecular formula

C13H16N2O4

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USP-1A02260

Dichlorothienoic Acid (4,5-dichlorothiophene-2-carboxylic acid)

Item no.

USP-1A02260

CAS Number

[31166-29-7]

Unit

25 mg

Molecular formula

C5H2Cl2O2S

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USP-1A02270

Rivaroxaban Phthalimide ((S)-2-(2-hydroxy-3-((4-(3-oxomorpholino)phenyl)amino)propyl)isoindoline-1,3-dione)

Item no.

USP-1A02270

CAS Number

[1369969-44-7]

Unit

25 mg

Molecular formula

C21H21N3O5

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USP-1A02280

Rivaroxaban isomer (4-(4-(((2-(5-chlorothiophen-2-yl)-4,5-dihydrooxazol-5-yl)methyl)amino)phenyl)morpholin-3-one)

Item no.

USP-1A02280

CAS Number

[n/a]

Unit

25 mg

Molecular formula

C18H18ClN3O3S

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USP-1A02290

Rivaroxaban phthalimido ethyl ester analog ((S)-1-(1,3-dioxoisoindolin-2-yl)-3-((ethoxycarbonyl)(4-(3-oxomorpholino)phenyl)amino)propan-2-yl 5-chlorothiophene-2-carboxylate)

Item no.

USP-1A02290

CAS Number

[n/a]

Unit

25 mg

Molecular formula

C29H26ClN3O8S

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USP-1A02330

rac-4,5-Dehydropregabalin (3-(aminomethyl)-5-methylhex-4-enoic acid)

Item no.

USP-1A02330

CAS Number

[216576-74-8]

Unit

25 mg

Molecular formula

C8H17NO2

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USP-1A02350

rac-5,6-Dehydropregabalin (3-(aminomethyl)-5-methylhex-5-enoic acid)

Item no.

USP-1A02350

CAS Number

[1136478-30-2]

Unit

25 mg

Molecular formula

C8H15NO2

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USP-1A02410

Aripiprazole di(quinolinonylbutyl) ether analog (7,7'-((oxybis(butane-4,1-diyl))bis(oxy))bis(3,4-dihydroquinolin-2(1H)-one))

Item no.

USP-1A02410

CAS Number

[1424858-02-5]

Unit

25 mg

Molecular formula

C26H32N2O5

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USP-1A02440

2-Monobromo Aripiprazole Hydrochloride (7-(4-(4-(2-bromophenyl)piperazin-1-yl)butoxy)-3,4-dihydroquinolin-2(1H)-one, hydrochloride)

Item no.

USP-1A02440

CAS Number

[n/a]

Unit

25 mg

Molecular formula

C23H28BrN3O2. HCl

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USP-1A02470

Aripiprazole Acid Analog (4-((2-oxo-1,2,3,4-tetrahydroquinolin-7-yl)oxy)butanoic acid)

Item no.

USP-1A02470

CAS Number

[58899-27-7]

Unit

25 mg

Molecular formula

C13H15NO4

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USP-1A02490

5-(4-Bromobutoxy)-3,4-dihydroquinolin-2(1H)-one (5-(4-bromobutoxy)-3,4-dihydroquinolin-2(1H)-one)

Item no.

USP-1A02490

CAS Number

[63309-35-3]

Unit

25 mg

Molecular formula

C13H16BrNO2

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USP-1A02510

8-Hydroxy-3,4-dihydroquinolin-2(1H)-one (3,4-dihydro-8-hydroxy-2(1H)-Quinolinone)

Item no.

USP-1A02510

CAS Number

[52749-50-5]

Unit

25 mg

Molecular formula

C9H9NO2

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USP-1A02560

Aripiprazole Hydroxyquinolinone Analog (7-hydroxyquinolin-2(1H)-one)

Item no.

USP-1A02560

CAS Number

[70500-72-0]

Unit

25 mg

Molecular formula

C9H7NO2

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USP-1A02610

Sitagliptin Styrylacetyl 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-3-en-1-one)

Item no.

USP-1A02610

CAS Number

[1803026-58-5]

Unit

25 mg

Molecular formula

C16H12F6N4O

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USP-1A02620

Sitagliptin (R)-Triazecine Analog ((R)-10-(2,4,5-trifluorobenzyl)-3-(trifluoromethyl)-6,7,10,11-tetrahydro-[1,2,4]triazolo[3,4-c][1,4,7]triazecine-8,12(5H,9H)-dione)

Item no.

USP-1A02620

CAS Number

[2088771-61-1]

Unit

25 mg

Molecular formula

C16H13F6N5O2

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USP-1A02660

Sitagliptin Alcohol (3-hydroxy-1-(3-(trifluoromethyl)-5,6-dihydro-[1,2,4]triazolo[4,3-a]pyrazin-7(8H)-yl)-4-(2,4,5-trifluorophenyl)butan-1-one)

Item no.

USP-1A02660

CAS Number

[1253056-01-7]

Unit

25 mg

Molecular formula

C16H14F6N4O2

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USP-1A02670

Sitagliptin Ketone (1-(3-(trifluoromethyl)-5,6-dihydro-[1,2,4]triazolo[4,3-a]pyrazin-7(8H)-yl)-4-(2,4,5-trifluorophenyl)butane-1,3-dione)

Item no.

USP-1A02670

CAS Number

[764667-65-4]

Unit

25 mg

Molecular formula

C16H12F6N4O2

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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-1A02740

Epinephrine Hydrochloride Methoxy Analog (4-(1-methoxy-2-(methylamino)ethyl)benzene-1,2-diol, hydrochloride)

Item no.

USP-1A02740

CAS Number

[74571-90-7]

Unit

25 mg

Molecular formula

C10H15NO3. HCl

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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-1A02820

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

Item no.

USP-1A02820

CAS Number

[486460-31-5]

Unit

25 mg

Molecular formula

C16H16F5N5O

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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-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-1A02930

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

Item no.

USP-1A02930

CAS Number

[n/a]

Unit

25 mg

Molecular formula

C26H34N2O5. 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-1A02960

N-Desmethyl Ivabradine Hydrochloride (3-[3-[[[(7S)-3,4-dimethoxybicyclo[4.2.0]octa-1,3,5-trien-7-yl]methyl]amino]propyl]-1,3,4,5-tetrahydro-7,8-dimethoxy-2H-3-benzazepin-2-one, hydrochloride)

Item no.

USP-1A02960

CAS Number

[1246638-08-3]

Unit

25 mg

Molecular formula

C26H34N2O5. HCl

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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-1A02990

Paroxetine Hydrochloride Piperidinemethanol Analog (((3S,4R)-4-(4-fluorophenyl)piperidin-3-yl)methanol, hydrochloride)

Item no.

USP-1A02990

CAS Number

[220548-73-2]

Unit

25 mg

Molecular formula

C12H16FNO. HCl

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USP-1A03010

N-Phenoxycarbonyl Paroxetine (phenyl (3S,4R)-3-((benzo[d][1,3]dioxol-5-yloxy)methyl)-4-(4-fluorophenyl)piperidine-1-carboxylate)

Item no.

USP-1A03010

CAS Number

[253768-88-6]

Unit

25 mg

Molecular formula

C26H24FNO5

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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-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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