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Pharmaceutical Reference Standards

USP - United States Pharmacopeia Pharmaceutical Analytical Impurities

1209 products found

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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-1A00050

Rosuvastatin Ketone ((R,E)-7-(4-(4-fluorophenyl)-6-isopropyl-2-(N-methylmethylsulfonamido)pyrimidin-5-yl)-3-hydroxy-5-oxohept-6-enoic acid)

Item no.

USP-1A00050

CAS Number

[1422619-13-3]

Unit

25 mg

Molecular formula

C22H26FN3O6S

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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-1A00310

Hydroxyisobutyl Acetophenone (COLD SHIPMENT REQUIRED) (1-(4-(1-hydroxy-2-methylpropyl)phenyl)ethan-1-one)

Item no.

USP-1A00310

CAS Number

[1314907-71-5]

Unit

25 mg

Molecular formula

C12H16O2

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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-1A00590

7-Fluoro Risperidone (COLD SHIPMENT REQUIRED) (3-(2-(4-(7-fluorobenzo[d]isoxazol-3-yl)piperidin-1-yl)ethyl)-2-methyl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-4-one)

Item no.

USP-1A00590

CAS Number

[n/a]

Unit

10 mg

Molecular formula

C23H27FN4O2

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USP-1A00690

Bromobudesonide ((6aS,6bR,7S,8aS,8bS,11aR,12aS,12bS)-6b-bromo-7-hydroxy-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-1A00690

CAS Number

[313474-59-8]

Unit

25 mg

Molecular formula

C25H33BrO6

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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-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-1A01070

Alpha-Naphthol (Naphthalen-1-ol)

Item no.

USP-1A01070

CAS Number

[90-15-3]

Unit

25 mg

Molecular formula

C10H8O

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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-1A01210

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

Item no.

USP-1A01210

CAS Number

[3044-42-6]

Unit

25 mg

Molecular formula

C23H28O

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USP-1A01240

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

Item no.

USP-1A01240

CAS Number

[3949-79-9]

Unit

25 mg

Molecular formula

C23H28O7

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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-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-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-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-1A01430

Clopidogrel Piperidinylidene Analog ((E)-2-(1-(1-(2-chlorophenyl)-2-methoxy-2-oxoethyl)-4-((2-(3-methoxyphenyl)-2-oxoethyl)thio)piperidin-3-ylidene)acetic acid)

Item no.

USP-1A01430

CAS Number

[n/a]

Unit

25 mg

Molecular formula

C25H26ClNO6S

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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-1A01610

Aminophenylmorpholin-2-one (4-(4-aminophenyl)morpholin-2-one)

Item no.

USP-1A01610

CAS Number

[1456733-00-8]

Unit

25 mg

Molecular formula

C10H12N2O2

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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-1A01710

Methyl 2-chloro-Beta-D-phenylalanine (methyl (R)-2-amino-2-(2-chlorophenyl)acetate, hydrochloride)

Item no.

USP-1A01710

CAS Number

[212838-70-5]

Unit

25 mg

Molecular formula

C9H10ClNO2.HCl

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USP-1A01780

Escitalopram Acid Analog (1-(3-(dimethylamino)propyl)-1-(4-fluorophenyl)-1,3-dihydroisobenzofuran-5-carboxylic acid)

Item no.

USP-1A01780

CAS Number

[440121-09-5]

Unit

25 mg

Molecular formula

C20H22FNO3

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USP-1A01790

N-Methyl Lacosamide ((R)-2-(N-methylacetamido)-N-benzyl-3-methoxypropanamide)

Item no.

USP-1A01790

CAS Number

[n/a]

Unit

25 mg

Molecular formula

C14H20N2O3

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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-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-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-1A01930

Tacrolimus 5E-ene

Item no.

USP-1A01930

CAS Number

[104987-16-8]

Unit

25 mg

Molecular formula

C44H67NO11

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USP-1A01960

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

Item no.

USP-1A01960

CAS Number

[103129-82-4]

Unit

25 mg

Molecular formula

C20H25ClN2O5

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USP-1A02030

4'-Hydroxycelecoxib (4-(5-(4-(hydroxymethyl)phenyl)-3-(trifluoromethyl)-1H-pyrazol-1-yl)benzenesulfonamide)

Item no.

USP-1A02030

CAS Number

[170571-00-3]

Unit

25 mg

Molecular formula

C17H14F3N3O3S

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USP-1A02060

trans-Cholecalciferol (COLD SHIPMENT REQUIRED)

Item no.

USP-1A02060

CAS Number

[22350-41-0]

Unit

25 mg

Molecular formula

C27H44O

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USP-1A02120

Clopidogrel Diester Enantiomer Sulfate ((S)-1-(2-chlorophenyl)-2-methoxy-2-oxoethyl (R)-2-(2-chlorophenyl)-2-(6,7-dihydrothieno[3,2-c]pyridin-5(4H)-yl)acetate, sulfate)

Item no.

USP-1A02120

CAS Number

[n/a]

Unit

25 mg

Molecular formula

C24H21Cl2NO4S. H2SO4

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USP-1A02160

4-Hydroxy Duloxetine Acetate ((S)-4-(3-(methylamino)-1-(thiophen-2-yl)propoxy)naphthalen-1-ol, acetate)

Item no.

USP-1A02160

CAS Number

[n/a]

Unit

25 mg

Molecular formula

C18H19NO2S. C2H4O2

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USP-1A02190

Duloxetine Phthalamide ((S)-2-(methyl(3-(naphthalen-1-yloxy)-3-(thiophen-2-yl)propyl)carbamoyl)benzoic acid)

Item no.

USP-1A02190

CAS Number

[199191-67-8]

Unit

25 mg

Molecular formula

C26H23NO4S

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USP-1A02240

Rivaroxaban Open Oxomorpholine Ring ((S)-5-chloro-N-((3-(4-(2-hydroxy-N-(2-hydroxyethyl)acetamido) phenyl)-2-oxooxazolidin-5-yl)methyl)thiophene-2-carboxamide)

Item no.

USP-1A02240

CAS Number

[1160170-00-2]

Unit

10 mg

Molecular formula

C19H20ClN3O6S

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USP-1A02300

Rivaroxaban Ethylamino Analog (1-amino-3-((4-(3-oxomorpholino)phenyl)amino)propan-2-yl 5-chlorothiophene-2-carboxylate, hydrochloride)

Item no.

USP-1A02300

CAS Number

[n/a]

Unit

25 mg

Molecular formula

C18H20ClN3O4S. 2 HCl

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USP-1A02310

N-Methyl rac-Lacosamide (2-acetamido-N-benzyl-3-methoxy-N-methylpropanamide)

Item no.

USP-1A02310

CAS Number

[388619-64-5]

Unit

25 mg

Molecular formula

C14H20N2O3

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USP-1A02400

Diisobutyl Diazecinedione (4,9-Diisobutyl-1,6-diazecane-2,7-dione)

Item no.

USP-1A02400

CAS Number

[1990538-03-8]

Unit

25 mg

Molecular formula

C16H30N2O2

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USP-1A02450

2-Dechloro Aripiprazole (7-(4-(4-(3-chlorophenyl)piperazin-1-yl)butoxy)-3,4-dihydroquinolin-2(1H)-one)

Item no.

USP-1A02450

CAS Number

[203395-82-8]

Unit

25 mg

Molecular formula

C23H28ClN3O2

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USP-1A02520

Aripiprazole N-oxide Isomer (4-(2,3-dichlorophenyl)-1-(4-((2-oxo-1,2,3,4-tetrahydroquinolin-7-yl)oxy)butyl)piperazine 4-oxide)

Item no.

USP-1A02520

CAS Number

[573691-11-9]

Unit

25 mg

Molecular formula

C23H27Cl2N3O3

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USP-1A02580

N1-(2-Chloroethyl)-N2-(2,3-dichlorophenyl)ethane-1,2-diamine hydrochloride (N1-(2-chloroethyl)-N2-(2,3-dichlorophenyl)ethane-1,2-diamine, hydrochloride)

Item no.

USP-1A02580

CAS Number

[n/a]

Unit

25 mg

Molecular formula

C10H13Cl3N2. HCl

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USP-1A02630

(S)-Sitagliptin Phosphate ((S)-3-amino-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 phosphate)

Item no.

USP-1A02630

CAS Number

[823817-58-9]

Unit

25 mg

Molecular formula

C16H18F6N5O5P

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USP-1A02940

Ivabradine Amine Hydrochloride ((S)-1-(3,4-dimethoxybicyclo[4.2.0]octa-1(6),2,4-trien-7-yl)-N-methylmethanamine, hydrochloride)

Item no.

USP-1A02940

CAS Number

[866783-13-3]

Unit

25 mg

Molecular formula

C12H17NO2. HCl

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USP-1A02970

7-Desmethyl Ivabradine ((S)-3-(3-(((3,4-dimethoxybicyclo[4.2.0]octa-1(6),2,4-trien-7-yl)methyl)(methyl)amino)propyl)-7-hydroxy-8-methoxy-1,3,4,5-tetrahydro-2H-benzo[d]azepin-2-one)

Item no.

USP-1A02970

CAS Number

[304462-60-0]

Unit

25 mg

Molecular formula

C26H34N2O5

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USP-1A03090

Ivabradine N-Oxide (3-(7,8-dimethoxy-2-oxo-1,2,4,5-tetrahydro-3H-benzo[d]azepin-3-yl)-N-(((S)-3,4-dimethoxybicyclo[4.2.0]octa-1(6),2,4-trien-7-yl)methyl)-N-methylpropan-1-amine oxide)

Item no.

USP-1A03090

CAS Number

[n/a]

Unit

25 mg

Molecular formula

C27H36N2O6

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