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Pharmaceutical Reference Standards

USP - United States Pharmacopeia Pharmaceutical Analytical Impurities

1017 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-1A00020

Atorvastatin Methyl Ester (methyl (3R,5R)-7-(2-(4-fluorophenyl)-5-isopropyl-3-phenyl-4-(phenylcarbamoyl)-1H-pyrrol-1-yl)-3,5-dihydroxyheptanoate)

Item no.

USP-1A00020

CAS Number

[345891-62-5]

Unit

25 mg

Molecular formula

C34H37FN2O5

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USP-1A00040

Hydroxythiadiazol Sulfoxide Derivative (4-morpholino-1,2,5-thiadiazol-3(2H)-one 1-oxide)

Item no.

USP-1A00040

CAS Number

[75202-36-7]

Unit

25 mg

Molecular formula

C6H9N3O3S

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USP-1A00060

Desmethoxy Omeprazole (2-(((3,5-dimethylpyridin-2-yl)methyl)sulfinyl)-5-methoxy-1H-benzo[d]imidazole)

Item no.

USP-1A00060

CAS Number

[110374-16-8]

Unit

25 mg

Molecular formula

C16H17N3O2S

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USP-1A00070

3'-(N,N-Didemethyl)azithromycin (Aminoazithromycin)

Item no.

USP-1A00070

CAS Number

[612069-27-9]

Unit

25 mg

Molecular formula

C36H68N2O12

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USP-1A00080

3'-De(dimethylamino)-3'-oxoazithromycin

Item no.

USP-1A00080

CAS Number

[612069-25-7]

Unit

25 mg

Molecular formula

C36H65NO13

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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-1A00130

Quetiapine Tetraethylene Glycol Fumarate Salt (COLD SHIPMENT REQUIRED) (2-(2-(2-(2-(4-(dibenzo[b,f][1,4]thiazepin-11-yl)piperazin-1-yl)ethoxy)ethoxy)ethoxy)ethan-1-ol-fumarate)

Item no.

USP-1A00130

CAS Number

[2470243-24-2]

Unit

25 mg

Molecular formula

C25H33N3O4S ? C4H4O4

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USP-1A00140

R,R,S-Ezetimibe ((3R,4S)-1-(4-fluorophenyl)-3-((R)-3-(4-fluorophenyl)-3-hydroxypropyl)-4-(4-hydroxyphenyl)azetidin-2-one)

Item no.

USP-1A00140

CAS Number

[163380-16-3]

Unit

25 mg

Molecular formula

C24H21F2NO3

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USP-1A00150

Bis(dibenzothiazepinyl) Piperazine (1,4-Bis(dibenzo[b,f][1,4]thiazepin-11-yl)piperazine)

Item no.

USP-1A00150

CAS Number

[945668-94-0]

Unit

25 mg

Molecular formula

C30H24N4S2

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USP-1A00160

Decarboxy Levofloxacin ((S)-9-fluoro-3-methyl-7-oxo-10-(4-methylpiperazine-1-yl)-2,3-dihydro-7H-pyrido [1,2,3-de] -1,4-benzoxazine)

Item no.

USP-1A00160

CAS Number

[178964-53-9]

Unit

25 mg

Molecular formula

C17H20FN3O2

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USP-1A00180

N-Ethyl Quetiapine (11-(4-Ethylpiperazin-1-yl)dibenzo[b,f][1,4]thiazepine hydrochloride)

Item no.

USP-1A00180

CAS Number

[1011758-03-4] (free base)

Unit

25 mg

Molecular formula

C19H21N3S. C4H4O4

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USP-1A00200

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

Item no.

USP-1A00200

CAS Number

[400024-12-6]

Unit

25 mg

Molecular formula

C21H27ClN2O5 · (C4H4O4)

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USP-1A00210

3'-(N,N-Didemethyl)-3'-N-formylazithromycin

Item no.

USP-1A00210

CAS Number

[765927-71-7]

Unit

25 mg

Molecular formula

NA

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USP-1A00230

N-Isopropyl Carvedilol (1-(9H-Carbazol-4-yloxy)-3-[[2-(2-methoxyphenoxy)ethyl](1-methylethyl)amino]-2-propanol)

Item no.

USP-1A00230

CAS Number

[1246819-01-1]

Unit

25 mg

Molecular formula

C27H32N2O4

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USP-1A00240

o-Celecoxib (4-(5-(o-tolyl)-3-(trifluoromethyl)-1H-pyrazol-1-yl)benzenesulfonamide)

Item no.

USP-1A00240

CAS Number

[170569-99-0]

Unit

25 mg

Molecular formula

C17H14F3N3O2S

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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-1A00260

Azacitidine Formyl Amidine Analog (N-(Formyl amidino)-N'-Beta-D-ribofuranosylurea) (INTERNATIONAL COLD CHAIN SHIPMENT REQUIRED)

Item no.

USP-1A00260

CAS Number

[65126-88-7]

Unit

25 mg

Molecular formula

C8H14N4O6

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USP-1A00270

Azacitidine Isomer -3 (1-Beta-D-Ribofuranosyl-3-aminocarbonyl guanidine acetate)

Item no.

USP-1A00270

CAS Number

[n/a]

Unit

25 mg

Molecular formula

C9H18N4O7

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USP-1A00321

Clindamycin 3-Phosphate (COLD SHIPMENT REQUIRED) (Methyl 7-chloro-6,7,8-trideoxy-6-[(2S,4R)-1-methyl-4-propylpyrrolidine-2-carboxamido]-1-thio-L-threo-alpha-D-galacto-octopyranoside 3-phosphate)

Item no.

USP-1A00321

CAS Number

[28708-34-1]

Unit

10 mg

Molecular formula

C18H34ClN2O8PS

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USP-1A00360

Ethylpyrazinediethanol (2,2'-(3-ethylpyrazine-2,5-diyl)bis(ethan-1-ol))

Item no.

USP-1A00360

CAS Number

[86917-74-0]

Unit

10 mg

Molecular formula

C10H16N2O2

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USP-1A00500

Budesonide D-homo Analog ((4aR,4bS,5S,6aS,7aR,10aR,11aS,11bS)-5-hydroxy-7a-(hydroxymethyl)-4a,6a-dimethyl-9-propyl-4b,6,6a,7a,10a,11,11a,11b,12,13-decahydrochryseno[2,3-d][1,3]dioxole-2,7(4aH,5H)-dione)

Item no.

USP-1A00500

CAS Number

[1040085-99-1]

Unit

10 mg

Molecular formula

C25H34O6

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USP-1A00510

Budesonide Acetaldehyde Acetal (16alpha,17-[(1RS)-ethylidenebis(oxy)]-11beta,21-dihydroxypregna-1,4-diene-3,20-dione)

Item no.

USP-1A00510

CAS Number

[1040085-98-0]

Unit

25 mg

Molecular formula

C23H30O6

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USP-1A01720

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

Item no.

USP-1A01720

CAS Number

[n/a]

Unit

25 mg

Molecular formula

C16H18ClNO2S.HCl

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USP-1A11070

21-Dihydroxy Fluocinolone Acetonide (6alpha,9-Difluoro-11beta,21,21-trihydroxy-16alpha,17-[(1-methylethylidene)bis(oxy)]-pregna-1,4-diene-3,20-dione)

Item no.

USP-1A11070

Unit

25 mg

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USP-1A11660

7alpha-Hydroxy Hydrocortisone (7alpha,11beta,17,21-Tetrahydroxypregn-4-ene-3,20-dione)

Item no.

USP-1A11660

Unit

25 mg

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USP-1A11680

Itraconazole 4-Triazolyl Isomer (4-(4-{4-[4-({(2RS,4SR)-2-[(4H-1,2,4-Triazol-4-yl)methyl]-2-(2,4-dichlorophenyl)-1,3-dioxolan-4-yl}methoxy)phenyl]piperazin-1-yl}phenyl)-2-sec-butyl-2H-1,2,4-triazol-3(4H)-one)

Item no.

USP-1A11680

Unit

25 mg

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USP-1A11980

Methyl 2-chloromethyl-3-nitrobenzoate (methyl 2-(chloromethyl)-3-nitrobenzoate)

Item no.

USP-1A11980

Unit

25 mg

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USP-1A12280

Desmethyl Edoxaban (N1-(5-chloropyridin-2-yl)-N2-((1S,2R,4S)-2-(5-methyl-4,5,6,7-tetrahydrothiazolo[5,4-c]pyridine-2-carboxamido)-4-(methylcarbamoyl)cyclohexyl)oxalamide)

Item no.

USP-1A12280

Unit

25 mg

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USP-1A12320

3-N-Boc-N-Nitrosopiperidine (tert-butyl (R)-(1-nitrosopiperidin-3-yl)carbamate)

Item no.

USP-1A12320

Unit

25 mg

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USP-1A12690

Lidocaine N2-oxide (2-[(2,6-Dimethylphenyl)amino]-N,N-diethyl-2-oxoethan-1-amine oxide)

Item no.

USP-1A12690

Unit

25 mg

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USP-1A12710

2-(Diethylamino)-N-(2,4-dimethylphenyl)acetamide Hydrochloride (2-(Diethylamino)-N-(2,4-dimethylphenyl)acetamide hydrochloride)

Item no.

USP-1A12710

Unit

25 mg

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USP-1A12720

Desfluoro Paliperidone (3-{2-[4-(Benzisoxazol-3-yl)piperidin-1-yl]ethyl}-9-hydroxy-2-methyl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-4-one)

Item no.

USP-1A12720

Unit

25 mg

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USP-1A12810

Keto Safinamide ((S)-N-(1-Amino-1-oxopropan-2-yl)-4-[(3-fluorobenzyl)oxy]benzamide)

Item no.

USP-1A12810

Unit

25 mg

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USP-1A13020

O-Dealkyl Ticagrelor ((1S,2R,3S,4R)-4-(7-(((1R,2S)-2-(3,4-difluorophenyl)cyclopropyl)amino)-5-(propylthio)-3H-[1,2,3]triazolo[4,5-d]pyrimidin-3-yl)cyclopentane-1,2,3-triol)

Item no.

USP-1A13020

Unit

25 mg

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USP-1A13030

Ticagrelor Amine ((1S,2S,3R,5S)-3-(7-amino-5-(propylthio)-3H-[1,2,3]triazolo[4,5-d]pyrimidin-3-yl)-5-(2-hydroxyethoxy)cyclopentane-1,2-diol)

Item no.

USP-1A13030

Unit

25 mg

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USP-1A13100

Ranolazine Alcohol Dimer (3,3'-(piperazine-1,4-diyl)bis(1-(2-methoxyphenoxy)propan-2-ol))

Item no.

USP-1A13100

Unit

25 mg

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USP-1A13130

Ranolazine 4N-Oxide (4-(2-((2,6-Dimethylphenyl)amino)-2-oxoethyl)-1-(2-hydroxy-3-(2-methoxyphenoxy)propyl)piperazine 1-oxide)

Item no.

USP-1A13130

Unit

25 mg

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USP-1A13330

16alpha-Methyl-9alpha-fluorocortisol 21-acetate (9-Fluoro-11beta,17-dihydroxy-16alpha-methyl-3,20-dioxopregn-4-en-21-yl acetate)

Item no.

USP-1A13330

Unit

25 mg

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USP-1A13520

6,8-Dioxo Apalutamide (4-(7-(6-Cyano-5-(trifluoromethyl)pyridin-3-yl)-6,8-dioxo-5,7-diazaspiro[3.4]octan-5-yl)-2-fluoro-N-methylbenzamide)

Item no.

USP-1A13520

Unit

25 mg

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USP-1A13710

Sacubitril Lactam ((3R,5S)-4-(5-([1,1'-Biphenyl]-4-ylmethyl)-3-methyl-2-oxopyrrolidin-1-yl)-4-oxobutanoic acid)

Item no.

USP-1A13710

Unit

25 mg

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USP-1A13780

Desacetyl Apremilast ((S)-4-Amino-2-[1-(3-ethoxy-4-methoxyphenyl)-2-(methylsulfonyl)ethyl]isoindoline-1,3-dione)

Item no.

USP-1A13780

Unit

25 mg

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USP-1A13860

Dabigatran Benzamide (3-{2-[((4-Carbamoylphenyl)amino)methyl]-1-methyl-N-(pyridin-2-yl)-1H-benzimidazole-5-carboxamido}propanoic acid)

Item no.

USP-1A13860

Unit

25 mg

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USP-1A13980

Estradiol Dibenzoate ((17beta)-Estra-1,3,5(10)-triene-3,17-diyl dibenzoate)

Item no.

USP-1A13980

Unit

25 mg

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USP-1A14000

Estrone Benzoate (17-Oxoestra-1,3,5(10)-trien-3-yl benzoate)

Item no.

USP-1A14000

Unit

25 mg

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USP-1A14020

Methoxy Ketorolac (5-Benzoyl-1-methoxy-2,3-dihydro-1H-pyrrolizine-1-carboxylic acid)

Item no.

USP-1A14020

Unit

25 mg

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USP-1A14040

Ketorolac Methyl Ester (Methyl 5-benzoyl-2,3-dihydro-1H-pyrrolizine-1-carboxylate)

Item no.

USP-1A14040

Unit

25 mg

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USP-1A14050

Ketorolac Ethyl Ester (Ethyl 5-benzoyl-2,3-dihydro-1H-pyrrolizine-1-carboxylate)

Item no.

USP-1A14050

Unit

25 mg

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USP-1A14120

Chloro Sofosbuvir (Isopropyl [(S)-{[(2R,3R,4R,5R)-5-(2,4-dioxo-3,4-dihydropyrimidin-1(2H)-yl)-4-chloro-3-hydroxy-4-methyltetrahydrofuran-2-yl]methoxy}(phenoxy)phosphoryl]-L-alaninate)

Item no.

USP-1A14120

Unit

25 mg

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