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Pharmaceutical Reference Standards

USP - United States Pharmacopeia Pharmaceutical Analytical Impurities

1335 products found

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USP-1A00490

Amoxicilloic Acid Dimers 1 and 2

Item no.

USP-1A00490

CAS Number

[2088961-38-8]

Unit

10 mg

Molecular formula

C32H40N6O11S2

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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-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-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-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-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

C23H25I2NO3 · HCl

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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-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-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-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-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-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-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-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-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-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-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-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-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-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-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-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-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-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-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-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-1A02100

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

Item no.

USP-1A02100

CAS Number

[1319197-73-3]

Unit

25 mg

Molecular formula

C15H14ClNO3S

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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-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-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-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-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-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-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-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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