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Pharmaceutical Reference Standards

USP - United States Pharmacopeia Pharmaceutical Analytical Impurities

791 products found

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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-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-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-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-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-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-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-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-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-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-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-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-1A01720

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

Item no.

USP-1A01720

CAS Number

[n/a]

Unit

25 mg

Molecular formula

C16H18ClNO2S.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-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-1A01930

Tacrolimus 5E-ene

Item no.

USP-1A01930

CAS Number

[104987-16-8]

Unit

25 mg

Molecular formula

C44H67NO11

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USP-1A01940

Methoxycyclohexanol methacrylic aldehyde ((E)-3-((1R,3R,4R)-4-hydroxy-3-methoxycyclohexyl)-2-methylacrylaldehyde)

Item no.

USP-1A01940

CAS Number

[109466-74-2]

Unit

25 mg

Molecular formula

C11H18O3

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USP-1A01950

Dimethylacrylamide tolyl ketone ((2E)-N,N-dimethyl-4-(4-methylphenyl)-4-oxobut-2-enamide)

Item no.

USP-1A01950

Unit

25 mg

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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-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-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-1A02020

9-Bromo-16alpha-hydroxyprednisolone ((8S,9R,10S,11S,13S,14S,16R,17S)-9-bromo-11,16,17-trihydroxy-17-(2-hydroxyacetyl)-10,13-dimethyl-6,7,8,9,10,11,12,13,14,15,16,17-dodecahydro-3H-cyclopenta[a]phenanthren-3-one)

Item no.

USP-1A02020

CAS Number

[n/a]

Unit

25 mg

Molecular formula

C21H27BrO6

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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-1A02040

(4-Methylbenzoyl)trifluoroacetone (1,1,1-Trifluoro-4-hydroxy-4-(4-methylphenyl)-3-buten-2-one)

Item no.

USP-1A02040

CAS Number

[910303-54-7]

Unit

25 mg

Molecular formula

C11H9F3O2

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USP-1A02050

Isotachysterol3 (COLD SHIPMENT REQUIRED) (S)-4-methyl-3-((E)-2-((1R,7aR)-7a-methyl-1-((R)-6-methylheptan-2-yl)-2,3,5,6,7,7a-hexahydro-1H-inden-4-yl)vinyl)cyclohex-3-en-1-ol)

Item no.

USP-1A02050

CAS Number

[22350-43-2]

Unit

25 mg

Molecular formula

C27H44O

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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-1A02070

7-Dehydrocholesterol (COLD SHIPMENT REQUIRED) ((3S,9S,10R,13R,14R,17R)-10,13-dimethyl-17-((R)-6-methylheptan-2-yl)-2,3,4,9,10,11,12,13,14,15,16,17-dodecahydro-1H-cyclopenta[a]phenanthren-3-ol)

Item no.

USP-1A02070

CAS Number

[434-16-2]

Unit

25 mg

Molecular formula

C27H44O

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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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