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Pharmaceutical Reference Standards

USP - United States Pharmacopeia Pharmaceutical Analytical Impurities

1527 products found

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USP-1A00910

Celecoxib Open Ring (4-((1,1,1-trifluoro-4-hydroxy-4-(p-tolyl)but-3-en-2-ylidene)amino)benzenesulfonamide)

Item no.

USP-1A00910

CAS Number

[n/a]

Unit

25 mg

Molecular formula

C17H15F3N2O3S

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USP-1A01230

16Alpha-Hydroxy Prednisolone-14-ene ((8R,9S,10R,11S,13S,16R,17S)-11,16,17-trihydroxy-17-(2-hydroxyacetyl)-10,13-dimethyl-6,7,8,9,10,11,12,13,16,17-decahydro-3H-cyclopenta[a]phenanthren-3-one)

Item no.

USP-1A01230

CAS Number

[131918-73-5]

Unit

25 mg

Molecular formula

C21H26O6

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USP-1A01290

TEMED Dihydrochloride (N1,N1,N2,N2-tetramethylethane-1,2-diamine, hydrochloride)

Item no.

USP-1A01290

CAS Number

[7677-21-6]

Unit

25 mg

Molecular formula

C6H16N2·2HCl

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USP-1A01300

Bis(dimethylaminoethyl) Ether Dihydrochloride (2,2'-oxybis(N,N-dimethylethan-1-amine), hydrochloride)

Item no.

USP-1A01300

CAS Number

[103526-47-2]

Unit

25 mg

Molecular formula

C8H20N2O·2HCl

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USP-1A01310

tert-Octylamine (2,4,4-trimethylpentan-2-amine)

Item no.

USP-1A01310

CAS Number

[107-45-9]

Unit

25 mg

Molecular formula

C8H19N

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USP-1A01340

2,3-Dimethyl-2,3-butanediamine Dihydrochloride (2,3-dimethylbutane-2,3-diamine, hydrochloride)

Item no.

USP-1A01340

CAS Number

[75804-28-3]

Unit

25 mg

Molecular formula

C6H16N2·2HCl

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USP-1A01530

Aminophenylmorpholinone (4-(4-aminophenyl)morpholin-3-one)

Item no.

USP-1A01530

CAS Number

[438056-69-0]

Unit

25 mg

Molecular formula

C10H12N2O2

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USP-1A01570

Rivaroxaban Phthalimido Analog ((R)-2-(2-hydroxy-3-((4-(3-oxomorpholino)phenyl)amino)propyl) isoindoline-1,3-dione)

Item no.

USP-1A01570

CAS Number

[446292-07-5]

Unit

25 mg

Molecular formula

C21H21N3O5

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USP-1A05170

N-Nitroso Epinephrine Solution (1 mg/mL in Acetonitrile) ((R)-N-(2-(3,4-dihydroxyphenyl)-2-hydroxyethyl)-N-methylnitrous amide)

Item no.

USP-1A05170

Unit

1 mL

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USP-1A06140

17a-Homobetamethasone Phosphoric Acid (((1S,3S,4aS,4bS,10aS,10bR,11S,12aS)-10b-fluoro-1,11-dihydroxy-3,10a,12a-trimethyl-2,8-dioxo-1,2,3,4,4a,4b,5,6,8,10a,10b,11,12,12a-tetradecahydrochrysen-1-yl)methyl dihydrogen phosphate)

Item no.

USP-1A06140

Unit

10 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-1A06860

Orlistat Open Ring Epimer ((2S,3R,5S)-5-((formyl-L-leucyl)oxy)-2-hexyl-3-hydroxyhexadecanoic acid)

Item no.

USP-1A06860

Unit

25 mg

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USP-1A07130

Ditranexamic Acid Amine (Cyclohexanecarboxylic acid, 4,4', -[iminobis(methylene)]bis-, [trans(trans)], trans,trans-4,4'-[Iminobis(methylene)]dicyclohexanecarboxylic acid)

Item no.

USP-1A07130

Unit

25 mg

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USP-1A07480

Doxylamine Dioxide (N,N-Dimethyl-2-(1-(1-oxidopyridin-2-yl)-1-phenylethoxy)ethan-1-amine N-oxide, N,N-Dimethyl-2-(1-(1-oxidopyridin-2-yl)-1-phenylethoxy)ethan-1-amine oxide) (COLD SHIPMENT REQUIRED)

Item no.

USP-1A07480

Unit

25 mg

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USP-1A08380

Pseudoerythromycin A Enol Ether

Item no.

USP-1A08380

Unit

25 mg

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USP-1A08620

Trifluoro-4-cresol (4-trifluoromethylphenol)

Item no.

USP-1A08620

Unit

25 mg

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USP-1A08660

N-Despropyl Propafenone Hydrochloride (2'-(2-Hydroxy-3-aminopropoxy)-3-phenylpropiophenone hydrochloride)

Item no.

USP-1A08660

Unit

25 mg

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USP-1A08670

Fluvoxketone (5-Methoxy-1-(4-(trifluoromethyl)phenyl)pentan-1-one)

Item no.

USP-1A08670

Unit

25 mg

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USP-1A08680

Dihydroquinine (R-[(2S,4S,5R)-5-Ethylquinuclidin-2-yl](6-methoxyquinolin-4-yl)methanol)

Item no.

USP-1A08680

Unit

25 mg

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USP-1A08750

Estradiol Divalerate (Estra-1,3,5(10)-trien-3,17beta-diyl divalerate)

Item no.

USP-1A08750

Unit

25 mg

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USP-1A09080

N-Nitroso Landiolol Solution (1 mg/mL in Methanol) (((S)-2,2-dimethyl-1,3-dioxolan-4-yl)methyl 3-(4-((S)-2-hydroxy-3-((2-(morpholine-4-carboxamido)ethyl)(nitroso)amino)propoxy)phenyl)propanoate)

Item no.

USP-1A09080

Unit

1 mL

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USP-1A09110

N-Nitroso Perindopril Solution (1 mg/mL in Acetonitrile) ((2S,3aS,7aS)-1-(N-((S)-1-ethoxy-1-oxopentan-2-yl)-N-nitroso-L-alanyl)octahydro-1H-indole-2-carboxylic acid)

Item no.

USP-1A09110

Unit

1 mL

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USP-1A09140

N-Nitroso Salmeterol Solution (1 mg/mL in Acetonitrile) (N-(2-hydroxy-2-(4-hydroxy-3-(hydroxymethyl)phenyl)ethyl)-N-(6-(4-phenylbutoxy)hexyl)nitrous amide)

Item no.

USP-1A09140

Unit

1 mL

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USP-1A09950

Propafenone Glycidyl Analog

Item no.

USP-1A09950

Unit

25 mg

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USP-1A10030

Promethazine Sulfoxide

Item no.

USP-1A10030

Unit

25 mg

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USP-1A10040

Rizatriptan N-Oxide (2-{5-[(1H-1,2,4-Triazol-1-yl)methyl]-1H-indol-3-yl}-N,N-dimethylethanamine oxide)

Item no.

USP-1A10040

Unit

25 mg

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USP-1A10060

17-Acetyl Norethindrone Acetate (3,20-Dioxo-19-nor-17alpha-pregn-4-en-17-yl acetate)

Item no.

USP-1A10060

Unit

25 mg

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USP-1A10160

Epoxy Betamethasone (9,11Beta-Epoxy-17,21-dihydroxy-16Beta-methyl-9Beta-pregna-1,4-diene-3,20-dione)

Item no.

USP-1A10160

Unit

25 mg

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USP-1A10290

Anhydroerythromycin A

Item no.

USP-1A10290

Unit

25 mg

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USP-1A10360

Diclofenac Acetamide (N-(4-Chlorophenyl)-2-(2,6-dichlorophenyl)acetamide)

Item no.

USP-1A10360

Unit

25 mg

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USP-1A10370

Diclofenac Methyl Ester (Methyl 2-{2-[(2,6-dichlorophenyl)amino]phenyl}acetate)

Item no.

USP-1A10370

Unit

25 mg

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USP-1A10400

Metronidazole Acid (2-(2-Methyl-5-nitroimidazol-1-yl)acetic acid)

Item no.

USP-1A10400

Unit

25 mg

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USP-1A10430

Iodo Naproxen ((S)-2-(5-Iodo-6-methoxynaphthalen-2-yl)propanoic acid)

Item no.

USP-1A10430

Unit

25 mg

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USP-1A10440

Naproxen Ethyl Ester ((S)-Ethyl 2-(6-methoxynaphthalen-2-yl)propanoate)

Item no.

USP-1A10440

Unit

25 mg

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USP-1A10450

2-Ethylnerolin (2-Ethyl-6-methoxynaphthalene)

Item no.

USP-1A10450

Unit

25 mg

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USP-1A10460

Vildagliptin Dimer ((2S,2'S)-1,1'-{2,2'-[(3-Hydroxyadamantan-1-yl)azanediyl]bis(acetyl)}bis(pyrrolidine-2-carbonitrile))

Item no.

USP-1A10460

Unit

25 mg

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USP-1A10520

Chloro Dapsone (4-[(4-Chlorophenyl)sulfonyl]aniline)

Item no.

USP-1A10520

Unit

25 mg

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USP-1A10540

Dideoxy Albuterol (4-[2-[(1,1-dimethylethyl)amino]ethyl]-2-methylphenol)

Item no.

USP-1A10540

Unit

25 mg

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USP-1A10560

4-Hydroxy 3-Hydroxymethylbenzaldehyde (4-Hydroxy-3-(hydroxymethyl)benzaldehyde)

Item no.

USP-1A10560

Unit

25 mg

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USP-1A10580

Amlodipine Phthalic Acid Analog (2-[(2-{[4-(2-Chlorophenyl)-3-(ethoxycarbonyl)-5-(methoxycarbonyl)-6-methyl-1,4-dihydropyridin-2-yl]methoxy}ethyl)carbamoyl]benzoic acid)

Item no.

USP-1A10580

Unit

25 mg

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USP-1A10620

Desmethyl Naproxen ((S)-2-(6-Hydroxynaphthalen-2-yl)propanoic acid)

Item no.

USP-1A10620

Unit

25 mg

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USP-1A10680

Ethyl Dapagliflozin ((2S,3R,4R,5S,6R)-2-[4-Chloro-3-(4-ethoxy-3-ethylbenzyl)phenyl]-6-(hydroxymethyl)tetrahydro-2H-pyran-3,4,5-triol)

Item no.

USP-1A10680

Unit

25 mg

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USP-1A10980

5-Chloro Bupropion Hydrochloride (2-(tert-Butylamino)-1-(3,5-dichlorophenyl)propan-1-one hydrochloride)

Item no.

USP-1A10980

Unit

25 mg

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USP-1A11180

N-[(2-Isopropylthiazol-4-yl)methyl]-N-methylnitrous amide (NITMA) (N-((2-isopropylthiazol-4-yl)methyl)-N-methylnitrous amide)

Item no.

USP-1A11180

Unit

10 mg

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USP-1A11360

17-Deoxy Prednisolone (11Beta,21-Dihydroxypregna-1,4-diene-3,20-dione)

Item no.

USP-1A11360

Unit

25 mg

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USP-1A18640

(R)-Sertraline Ketone ((4R)-4-(3,4-Dichlorophenyl)-3,4-dihydro-1(2H)-naphthalenone)

Item no.

USP-1A18640

Unit

25 mg

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USP-1A19760

[(2,4-Difluorobenzyl)amino](oxo)acetic acid ([(2,4-Difluorobenzyl)amino](oxo)acetic acid)

Item no.

USP-1A19760

Unit

25 mg

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USP-1A19920

Desacryloyl Desdiamino Nitro Osimertinib (5-Methoxy-N,N-dimethyl-N'-[4-(1-methyl-1H-indol-3-yl)-2-pyrimidinyl]-2-nitro-1,4-benzenediamine)

Item no.

USP-1A19920

Unit

25 mg

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USP-1A20340

Febuxostat Acid (2-(3-Carboxy-4-(2-methylpropoxy)phenyl)-4-methylthiazole-5-carboxylic acid)

Item no.

USP-1A20340

Unit

25 mg

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USP-1A20350

Febuxostat Oxime (2-{3-[(Hydroxyimino)methyl]-4-isobutoxyphenyl}-4-methylthiazole-5-carboxylic acid)

Item no.

USP-1A20350

Unit

25 mg

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