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Pharmaceutical Reference Standards

USP - United States Pharmacopeia Pharmaceutical Analytical Impurities

1507 products found

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USP-1A00820

Atorvastatin Pyrrolidone Lactone (5-(4-Fluorophenyl)-1-{2-[(2R,4R)-4-hydroxy-6-oxotetrahydro-2H-pyran-2-yl]ethyl}-3-isopropyl-2-oxo-N,4-diphenyl-2,3-dihydro-1H-pyrrole-3-carboxamide)

Item no.

USP-1A00820

CAS Number

[906552-19-0]

Unit

25 mg

Molecular formula

C33H33FN2O5

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USP-1A02380

rac-Pregabalin Imide Dimer Amide (3-((3-(aminomethyl)-5-methylhexanamido)methyl)-5-methylhexanoic acid)

Item no.

USP-1A02380

CAS Number

[1486961-58-3]

Unit

25 mg

Molecular formula

C16H32N2O3

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USP-1A02540

Aripiprazole Spiro Analog (8-(2,3-dichlorophenyl)-5,8-diazaspiro[4.5]decan-5-ium, bromide)

Item no.

USP-1A02540

CAS Number

[795313-24-5]

Unit

25 mg

Molecular formula

C14H19Cl2N2. Br

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USP-1A02910

Benzoylphenylacetonitrile (3-Benzoylbenzeneacetonitrile)

Item no.

USP-1A02910

CAS Number

[21288-34-6]

Unit

25 mg

Molecular formula

C15H11NO

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USP-1A03070

Piperazinedionecarbonyl D-phenylglycylglycine ((R)-(2-(4-ethyl-2,3-dioxopiperazine-1-carboxamido)-2-phenylacetyl) glycine)

Item no.

USP-1A03070

CAS Number

[2170771-47-6]

Unit

25 mg

Molecular formula

C17H20N4O6

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USP-1A03310

O-Desmethylmetoprolol (1-(4-(2-hydroxyethyl)phenoxy)-3-(isopropylamino)propan-2-ol)

Item no.

USP-1A03310

Unit

25 mg

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USP-1A03350

Methyl Varenicline (rel-(6S,10R)-2-methyl-7,8,9,10-tetrahydro-6H-6,10-methanoazepino[4,5-g]quinoxaline)

Item no.

USP-1A03350

Unit

25 mg

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USP-1A03360

N-Methyl Varenicline (7,8,9,10-tetrahydro-8-methyl-6,10-Methano-6H-pyrazino[2,3-h][3]benzazepine)

Item no.

USP-1A03360

Unit

25 mg

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USP-1A03390

N-Formyl Lenalidomide (N-(2-(2,6-dioxopiperidin-3-yl)-1-oxoisoindoIin-4-yl)formamide)

Item no.

USP-1A03390

Unit

25 mg

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USP-1A03470

O-Acetyl Bosentan (2-((6-((4-(tert-butyl)phenyl)sulfonamido)-5-(2-methoxyphenoxy)-[2,2'-bipyrimidin]-4-yl)oxy)ethyl acetate)

Item no.

USP-1A03470

Unit

25 mg

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USP-1A03480

Bosentan Bis4(tert-butylbenzenesulfonamide) (N,N'-(5-(2-methoxyphenoxy)-[2,2'-bipyrimidine]-4,6-diyl)bis(4-(tert-butyl)benzenesulfonamide))

Item no.

USP-1A03480

Unit

25 mg

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USP-1A03490

(1S,2R)-Eliglustat Diastereomer (N-[(1S,2R)-2-(2,3-Dihydro-1,4-benzodioxin-6-yl)-2-hydroxy-1-(1-pyrrolidinylmethyl)ethyl]octanamide)

Item no.

USP-1A03490

Unit

25 mg

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USP-1A03910

Vilanterol Diamine Triphenylacetate (4,4'-((1R,1'R)-((oxybis(hexane-6,1-diyl))bis(azanediyl))bis(1-hydroxyethane-2,1-diyl))bis(2-(hydroxymethyl)phenol), 2,2,2-triphenylacetate))

Item no.

USP-1A03910

Unit

25 mg

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USP-1A03960

N-Nitroso Sitagliptin Amine (NTTP) Solution (1 mg/mL in Methanol) (7-nitroso-3-(trifluoromethyl)-5,6,7,8-tetrahydro-[1,2,4]triazolo[4,3-a]pyrazine)

Item no.

USP-1A03960

Unit

1 mL

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USP-1A04030

N-Nitroso Rasagiline Solution (1 mg/mL in Methanol) ((R)-N-(2,3-Dihydro-1H-inden-1-yl)-N-(prop-2-yn-1-yl)nitrous amide)

Item no.

USP-1A04030

Unit

1 mL

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USP-1A04390

N-Nitroso Tamsulosin ((R)-5-(2-((2-(2-ethoxyphenoxy)ethyl)(nitroso)amino)propyl)-2-methoxybenzenesulfonamide)

Item no.

USP-1A04390

Unit

10 mg

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USP-1A04470

O-Desmethyl Apremilast ((S)-N-(2-(1-(3-ethoxy-4-hydroxyphenyl)-2-(methylsulfonyl)ethyl)-1,3-dioxoisoindolin-4-yl)acetamide)

Item no.

USP-1A04470

Unit

25 mg

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USP-1A04630

Fluticasone Propionate Thioacid ((6alpha,11Beta,16alpha,17alpha)-6,9-Difluoro-11-hydroxy-16-methyl-3-oxo-17-(1-oxopropoxy)androsta-1,4-diene-17-carbothioic acid)

Item no.

USP-1A04630

Unit

25 mg

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USP-1A04730

Tolvaptan Open Ring Hydroxyacid (4-(5-chloro-2-(2-methyl-4-(2-methylbenzamido)benzamido)phenyl)-4-hydroxybutanoic acid)

Item no.

USP-1A04730

Unit

25 mg

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USP-1A04760

Rac-Trans-4-Hydroxy Tolvaptan (rel-N-(4-((4S,5S)-7-chloro-4,5-dihydroxy-2,3,4,5-tetrahydro-1H-benzo[b]azepine-1-carbonyl)-3-methylphenyl)-2-methylbenzamide)

Item no.

USP-1A04760

Unit

10 mg

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USP-1A04820

4-Phenylbutyl(benzyl)amine hydrochloride (N-benzyl-4-phenylbutan-1-amine, hydrochloride)

Item no.

USP-1A04820

Unit

25 mg

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USP-1A04900

7-Hydroxymethyl Drospirenone (7Beta-(Hydroxymethyl)-3-oxo-15alpha,16alpha-dihydro-3'H-cyclopropa[15,16]-17alpha-pregn-4-ene-21,17-carbolactone)

Item no.

USP-1A04900

Unit

10 mg

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USP-1A05000

Mirabegron S-Enantiomer ((S)-2-(2-aminothiazol-4-yl)-N-(4-(2-((2-hydroxy-2-phenylethyl)amino)ethyl)phenyl)acetamide)

Item no.

USP-1A05000

Unit

25 mg

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USP-1A05680

Eltrombopag Amide ((Z)-3'-(2-(1-(3,4-dimethylphenyl)-3-methyl-5-oxo-1,5-dihydro-4H-pyrazol-4-ylidene)hydrazinyl)-2'-hydroxy-[1,1'-biphenyl]-3-carboxamide)

Item no.

USP-1A05680

Unit

25 mg

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USP-1A05690

Macitentan Amine (5-(4-bromophenyl)-6-(2-((5-bromopyrimidin-2-yl)oxy)ethoxy)pyrimidin-4-amine)

Item no.

USP-1A05690

Unit

25 mg

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USP-1A05740

2'-[Hydroxybiphenyl]-3-carboxylic acid (2'-hydroxy-[1,1'-biphenyl]-3-carboxylic acid)

Item no.

USP-1A05740

Unit

25 mg

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USP-1A05880

Carbidopa Ethyl Ester (Ethyl (S)-3-(3,4-dihydroxyphenyl)-2-hydrazineyl-2-methylpropanoate)

Item no.

USP-1A05880

Unit

25 mg

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USP-1A05890

Cisatracurium Besylate cis-Quaternary Methyl Ester ((1R,2R)-1-(3,4-dimethoxybenzyl)-6,7-dimethoxy-2-(3-methoxy-3-oxopropyl)-2-methyl-1,2,3,4-tetrahydroisoquinolin-2-iumbenzenesulfonate)

Item no.

USP-1A05890

Unit

25 mg

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USP-1A06130

Rosuvastatin Ethyl Ester

Item no.

USP-1A06130

CAS Number

[851443-04-4]

Unit

25 mg

Molecular formula

C24H32FN3O6S

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USP-1A06250

4-Epi-6-oxo Docetaxel (5beta,20-epoxy-1,7alpha-dihydroxy-9,10-dioxotax-11-ene-2alpha,4,13alpha-triyl 4-acetate 2-benzoate 13-[(2R,3S)-3-[[(1,1-dimethylethoxy)carbonyl]amino]-2-hydroxy-3-phenylpropanoate])

Item no.

USP-1A06250

Unit

25 mg

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USP-1A06260

6-Dichloroethoxycarbonyl Docetaxel

Item no.

USP-1A06260

Unit

25 mg

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USP-1A06480

Atazanavir Dipeptide Analog (methyl ((5S,8S,13S,14S,17S)-14-benzyl-5,8-di-tert-butyl-13-hydroxy-18,18-dimethyl-3,6,9,16-tetraoxo-11-(4-(pyridin-2-yl)benzyl)-2-oxa-4,7,10,11,15-pentaazanonadecan-17-yl)carbamate)

Item no.

USP-1A06480

Unit

25 mg

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USP-1A06680

3'-O-(5-deoxy-alpha-D-ribofuranosyl) Capecitabine ([1-[5-Deoxy-3-O-(5-deoxy-alpha-d-ribofuranosyl)-beta-d-ribofuranosyl]-5-fluoro-2-oxo-1,2-dihydropyrimidin-4-yl]-carbamic acid pentyl ester)

Item no.

USP-1A06680

Unit

10 mg

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USP-1A06820

Montelukast Sulfoxide ([1-[[[1-[3-[(E)-2-(7-Chloroquinolin-2-yl)ethenyl]phenyl]-3-[2-(1-hydroxy -1methylethyl)phenyl]propyl]sulfinyl]methyl]cyclopropyl]acetic acid)

Item no.

USP-1A06820

Unit

25 mg

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USP-1A06930

3-Chlorophenyl Sertraline Hydrochloride ((1RS,4RS)-4-(3-chlorophenyl)-N-methyl-1,2,3,4-tetrahydronaphthalen-1-amine hydrochloride)

Item no.

USP-1A06930

Unit

25 mg

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USP-1A07070

1,4-Bis(4-(benzothiophen-4-yl)piperazin-1-yl)butane (1,4-bis(4-(benzo[b]thiophen-4-yl)piperazin-1-yl)butane)

Item no.

USP-1A07070

Unit

25 mg

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USP-1A07230

Alprazolam Quinoline Derivative (7-chloro-1-methyl-5-phenyl[1,2,4]triazolo[4,3-a]quinolin-4-amine)

Item no.

USP-1A07230

Unit

10 mg

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USP-1A07420

Deschloroclomiphene Chlorophenyl Citrate Analog ((E,Z)-2-{4-[1,2-Bis(4-chlorophenyl)vinyl]phenoxy}-N,N-diethylethan-1-amine citrate)

Item no.

USP-1A07420

Unit

25 mg

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USP-1A07460

Mirtazapine N-Oxide (1,2,3,4,10,14b-Hexahydro-2-methylpyrazino[2,1-a]pyrido[2,3-c][2]benzazepine 2-oxide)

Item no.

USP-1A07460

Unit

25 mg

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USP-1A07490

Donepezil Alkene Pyridine N-Oxide (4-[(5,6-Dimethoxy-1-oxo-1,3-dihydro-2H-inden-2-ylidene)methyl]pyridine 1-oxide)

Item no.

USP-1A07490

Unit

25 mg

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USP-1A07600

Ammonium Methoxyiminofuranyl Acetate ((Z)-2-(Furan-2-yl)-2-(methoxyimino)acetic acid ammonium salt)

Item no.

USP-1A07600

Unit

25 mg

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USP-1A07620

4-(4-Chlorophenyl)-4-Piperidinol (4-(4-Chlorophenyl)piperidin-4-ol)

Item no.

USP-1A07620

Unit

25 mg

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USP-1A07730

2-Benzimidazolinone (1,3-Dihydro-2H-benzimidazol-2-one)

Item no.

USP-1A07730

Unit

25 mg

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USP-1A07820

Carbamazepine Dione (10,11-dioxo-10,11-dihydro-5H-dibenzo[b,f]azepine-5-carboxamide)

Item no.

USP-1A07820

CAS Number

[537693-29-1]

Unit

25 mg

Molecular formula

C15H10N2O3

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USP-1A07920

15-Keto-travoprost (10 mg) (INTERNATIONAL COLD CHAIN SHIPMENT REQUIRED) (isopropyl (Z)-7-((1R,2R,3R,5S)-3,5-dihydroxy-2-((E)-3-oxo-4-(3-(trifluoromethyl)phenoxy)but-1-en-1-yl)cyclopentyl)hept-5-enoate)

Item no.

USP-1A07920

Unit

10 mg

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USP-1A08220

7-O-Acetylpaclitaxel

Item no.

USP-1A08220

Unit

25 mg

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USP-1A08330

Ceftriaxone Triazine Analog (2-Methyl-3-thioxo-1,2,4-triazinane-5,6-dione, 3-Mercapto-2-methyl-1,2-dihydro-1,2,4-triazine-5,6-dione)

Item no.

USP-1A08330

Unit

25 mg

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USP-1A08400

Desmethoxy Fluvoxamine Maleate ((E)-1-[4-(Trifluoromethyl)phenyl]pentan-1-one O-(2-aminoethyl)oxime maleate)

Item no.

USP-1A08400

Unit

25 mg

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USP-1A08430

Minoxidil Pyrimidine Analog (6-Chloropyrimidine-2,4-diamine)

Item no.

USP-1A08430

Unit

25 mg

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USP-1A08440

16alpha-Methylprednisone (17,21-Dihydroxy-16alpha-methylpregna-1,4-diene-3,11,20-trione)

Item no.

USP-1A08440

Unit

25 mg

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