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Pharmaceutical Reference Standards

USP - United States Pharmacopeia Pharmaceutical Analytical Impurities

1015 products found

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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-1A00070

3'-(N,N-Didemethyl)azithromycin (Aminoazithromycin)

Item no.

USP-1A00070

CAS Number

[612069-27-9]

Unit

25 mg

Molecular formula

C36H68N2O12

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USP-1A00100

6alpha-Hydroxy ethinyl estradiol (COLD SHIPMENT REQUIRED) (19-Nor-17alpha-pregna-1,3,5(10)-trien-20-yne-3,6alpha,17-triol)

Item no.

USP-1A00100

CAS Number

[27521-34-2]

Unit

25 mg

Molecular formula

C20H24O3

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USP-1A00110

6Beta-Hydroxy Ethinyl Estradiol ((6R,8R,9S,13S,14S,17R)-17-ethynyl-13-methyl-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthrene-3,6,17-triol)

Item no.

USP-1A00110

CAS Number

[56324-28-8]

Unit

25 mg

Molecular formula

C20H24O3

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USP-1A00120

Fluoroandrostadiene Carboxylic Acid ((8S,9R,10S,11S,13S,14S,16R,17R)-9-fluoro-11,17-dihydroxy-10,13,16-trimethyl-3-oxo-6,7,8,9,10,11,12,13,14,15,16,17-dodecahydro-3H-cyclopenta[a]phenanthrene-17-carboxylic acid)

Item no.

USP-1A00120

CAS Number

[37927-01-8]

Unit

25 mg

Molecular formula

C21H27FO5

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USP-1A00140

R,R,S-Ezetimibe ((3R,4S)-1-(4-fluorophenyl)-3-((R)-3-(4-fluorophenyl)-3-hydroxypropyl)-4-(4-hydroxyphenyl)azetidin-2-one)

Item no.

USP-1A00140

CAS Number

[163380-16-3]

Unit

25 mg

Molecular formula

C24H21F2NO3

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USP-1A00150

Bis(dibenzothiazepinyl) Piperazine (1,4-Bis(dibenzo[b,f][1,4]thiazepin-11-yl)piperazine)

Item no.

USP-1A00150

CAS Number

[945668-94-0]

Unit

25 mg

Molecular formula

C30H24N4S2

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USP-1A00160

Decarboxy Levofloxacin ((S)-9-fluoro-3-methyl-7-oxo-10-(4-methylpiperazine-1-yl)-2,3-dihydro-7H-pyrido [1,2,3-de] -1,4-benzoxazine)

Item no.

USP-1A00160

CAS Number

[178964-53-9]

Unit

25 mg

Molecular formula

C17H20FN3O2

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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-1A00210

3'-(N,N-Didemethyl)-3'-N-formylazithromycin

Item no.

USP-1A00210

CAS Number

[765927-71-7]

Unit

25 mg

Molecular formula

NA

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USP-1A00220

Desoximetasone Acid (COLD SHIPMENT) ((11Beta,16alpha,17Beta)-9-Fluoro-11-hydroxy-16-methyl-3-oxoandrosta-1,4- diene-17-carboxylic acid, 9-Fluoro-11Beta-hydroxy-16alpha-methyl-3-oxoandrosta-1,4-diene-17Beta-carboxylic acid)

Item no.

USP-1A00220

CAS Number

[75262-69-0]

Unit

25 mg

Molecular formula

C21H27FO4

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USP-1A00230

N-Isopropyl Carvedilol (1-(9H-Carbazol-4-yloxy)-3-[[2-(2-methoxyphenoxy)ethyl](1-methylethyl)amino]-2-propanol)

Item no.

USP-1A00230

CAS Number

[1246819-01-1]

Unit

25 mg

Molecular formula

C27H32N2O4

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USP-1A00240

o-Celecoxib (4-(5-(o-tolyl)-3-(trifluoromethyl)-1H-pyrazol-1-yl)benzenesulfonamide)

Item no.

USP-1A00240

CAS Number

[170569-99-0]

Unit

25 mg

Molecular formula

C17H14F3N3O2S

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USP-1A00250

Donepezil quaternary salt (donepezilbenzyl Bromide) (1,1-dibenzyl-4-((5,6-dimethoxy-1-oxo-2,3-dihydro-1H-inden-2-yl)methyl)piperidin-1-ium, bromide)

Item no.

USP-1A00250

CAS Number

[844694-85-5]

Unit

25 mg

Molecular formula

C31H36BrNO3

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USP-1A00270

Azacitidine Isomer -3 (1-Beta-D-Ribofuranosyl-3-aminocarbonyl guanidine acetate)

Item no.

USP-1A00270

CAS Number

[n/a]

Unit

25 mg

Molecular formula

C9H18N4O7

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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-1A00330

Amoxicilloic amoxilloic acid dimers 1, 2, 3, and 4

Item no.

USP-1A00330

Unit

5 mg

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USP-1A00360

Ethylpyrazinediethanol (2,2'-(3-ethylpyrazine-2,5-diyl)bis(ethan-1-ol))

Item no.

USP-1A00360

CAS Number

[86917-74-0]

Unit

10 mg

Molecular formula

C10H16N2O2

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USP-1A00370

R-Levetiracetam Hydroxybutyramide Analog ((R)-N-(1-amino-1-oxobutan-2-yl)-4-hydroxybutanamide)

Item no.

USP-1A00370

CAS Number

[1847568-87-9]

Unit

10 mg

Molecular formula

C8H16N2O3

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USP-1A00380

Pyrazinediethanol Propionic Acid (3-(3,6-bis(2-hydroxyethyl)pyrazin-2-yl)propanoate, sodium salt)

Item no.

USP-1A00380

CAS Number

[96681-85-5] (free acid)

Unit

5 mg

Molecular formula

C11H15NaN2O4

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USP-1A00410

Budesonide Sulfate Triethylamine Salt

Item no.

USP-1A00410

CAS Number

[1436872-65-9]

Unit

10 mg

Molecular formula

C25H34O9S·C6H15N

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USP-1A00440

S-Levetiracetam Hydroxybutyramide Analog ((S)-N-(1-amino-1-oxobutan-2-yl)-4-hydroxybutanamide)

Item no.

USP-1A00440

CAS Number

[1868118-63-1]

Unit

10 mg

Molecular formula

C8H16N2O3

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USP-1A00450

Pyrazinediethanol (2,2'-(pyrazine-2,5-diyl)bis(ethan-1-ol))

Item no.

USP-1A00450

CAS Number

[4744-51-8]

Unit

10 mg

Molecular formula

C8H12N2O2

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USP-1A00460

Pyrrolic acid Derivative (4-(2-hydroxyethyl)-1H-pyrrole-3-carboxylic acid)

Item no.

USP-1A00460

CAS Number

[404839-11-8]

Unit

10 mg

Molecular formula

C7H9NO3

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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-1A00500

Budesonide D-homo Analog ((4aR,4bS,5S,6aS,7aR,10aR,11aS,11bS)-5-hydroxy-7a-(hydroxymethyl)-4a,6a-dimethyl-9-propyl-4b,6,6a,7a,10a,11,11a,11b,12,13-decahydrochryseno[2,3-d][1,3]dioxole-2,7(4aH,5H)-dione)

Item no.

USP-1A00500

CAS Number

[1040085-99-1]

Unit

10 mg

Molecular formula

C25H34O6

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USP-1A00510

Budesonide Acetaldehyde Acetal (16alpha,17-[(1RS)-ethylidenebis(oxy)]-11beta,21-dihydroxypregna-1,4-diene-3,20-dione)

Item no.

USP-1A00510

CAS Number

[1040085-98-0]

Unit

25 mg

Molecular formula

C23H30O6

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USP-1A00650

Rivaroxaban Open Ring Methylamine ((S)-4-(4-((2-hydroxy-3-(methylamino)propyl)amino)phenyl)morpholin-3-one)

Item no.

USP-1A00650

CAS Number

[2459303-14-9]

Unit

10 mg

Molecular formula

C14H21N3O3

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USP-1A00680

Budesonide 9(11)-ene ((6aS,8aS,8bS,11aR,12aS,12bS)-8b-(2-hydroxyacetyl)-6a,8a-dimethyl-10-propyl-1,2,6a,8,8a,8b,11a,12,12a,12b-decahydro-4H-naphtho[2',1':4,5]indeno[1,2-d][1,3]dioxol-4-one)

Item no.

USP-1A00680

CAS Number

[313474-58-7]

Unit

25 mg

Molecular formula

C25H32O5

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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-1A00710

Methoxyamiodarone ([2-[(1RS)-1-Methoxybutyl]benzofuran-3-yl][4-[2-(diethylamino)ethoxy]-3,5-diiodophenyl]methanone)

Item no.

USP-1A00710

CAS Number

[1087223-70-8]

Unit

25 mg

Molecular formula

C26H31I2NO4

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USP-1A00720

Desiodoamiodarone ((2-butylbenzofuran-3-yl)(4-(2-(diethylamino)ethoxy)phenyl)methanone)

Item no.

USP-1A00720

CAS Number

[23551-25-9]

Unit

25 mg

Molecular formula

C25H31NO3

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USP-1A00731

Fexofenadine Olefin (2-(4-(4-(4-(diphenylmethylene)piperidin-1-yl)-1-hydroxybutyl)phenyl)-2-methylpropanoic acid)

Item no.

USP-1A00731

CAS Number

[1187954-57-9]

Unit

25 mg

Molecular formula

C32H37NO3

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USP-1A00760

Atorvastatin 3-deoxyhept-2-enoic Acid ((S,E)-7-(2-(4-fluorophenyl)-5-isopropyl-3-phenyl-4-(phenylcarbamoyl)-1H-pyrrol-1-yl)-5-hydroxyhept-2-enoic acid)

Item no.

USP-1A00760

CAS Number

[1105067-93-3]

Unit

25 mg

Molecular formula

C33H33FN2O4

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USP-1A00770

Diamino Atorvastatin Calcium (Calcium (3R,5R)-7-[[(3R,5R)-7-[2-(4-fluorophenyl)-5-(1-methylethyl)-3-phenyl-4-(phenylcarbamoyl)-1H-pyrrol-1-yl]-3,5-dihydroxyheptanoyl]amino]-3,5-dihydroxyheptanoate)

Item no.

USP-1A00770

CAS Number

[1105067-87-5]

Unit

25 mg

Molecular formula

C40H47FN3O8 . 1/2Ca

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USP-1A00790

Atorvastatin Calcium Epoxy Pyrrolooxazin 7-Hydroxy Analog (Calcium 4-(1b-(4-fluorophenyl)-7-hydroxy-7-isopropyl-1a-phenyl-7a-(phenylcarbamoyl)hexahydro-3H-oxireno[2',3':3,4]pyrrolo[2,1-b][1,3]oxazin-3-yl)-3-hydroxybutanoate)

Item no.

USP-1A00790

CAS Number

[n/a]

Unit

25 mg

Molecular formula

C66H68CaF2N4O14 (2C33H34CFN2O7.Ca)

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USP-1A00810

Atorvastatin Sodium Pyrrolidone Analog ((3R,5R)-5-(4-Fluorophenyl)-2,3-dihydro-3,5-dihydroxy-3-(1-methylethyl)-2-oxo-4-phenyl-3-[(phenylamino)carbonyl]-1H-pyrrole-1-heptanoic Acid Sodium Salt)

Item no.

USP-1A00810

CAS Number

[148217-40-7]

Unit

25 mg

Molecular formula

C33H34FN2NaO6

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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-1A00960

Duloxetine Alcohol ((R)-3-(methylamino)-1-(thiophen-2-yl)propan-1-ol)

Item no.

USP-1A00960

CAS Number

[116539-57-2]

Unit

25 mg

Molecular formula

C8H13NOS

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USP-1A01000

Floxacin Amine (7-amino-1-cyclopropyl-6-fluoro-8-methoxy-4-oxo-1,4-dihydroquinoline-3-carboxylic acid)

Item no.

USP-1A01000

CAS Number

[172426-88-9]

Unit

25 mg

Molecular formula

C14H13FN2O4

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USP-1A01120

Fluticasone sulfenic acid ((6S,8S,9R,10S,11S,13S,14S,16R,17R)-6,9-difluoro-11-hydroxy-10,13,16-trimethyl-3-oxo-17-(propionyloxy)-6,7,8,9,10,11,12,13,14,15,16,17-dodecahydro-3H-cyclopenta[a]phenanthrene-17-carbo(thioperoxoic )O-acid)

Item no.

USP-1A01120

CAS Number

[948566-12-9]

Unit

25 mg

Molecular formula

C24H30F2O6S

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USP-1A01190

Rivaroxaban N-acyl glycolic acid ((S)-2-(2-(5-chloro-N-(4-(5-((5-chlorothiophene-2-carboxamido)methyl)-2-oxooxazolidin-3-yl)phenyl)thiophene-2-carboxamido)ethoxy)acetic acid)

Item no.

USP-1A01190

CAS Number

[1151893-81-0]

Unit

25 mg

Molecular formula

C24H21Cl2N3O7S2

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USP-1A01220

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

Item no.

USP-1A01220

CAS Number

[131918-72-4]

Unit

25 mg

Molecular formula

C23H28O7

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USP-1A06880

Orlistat Open Ring ((2S,3S,5S)-5-[(Formyl-L-leucyl)oxy]-2-hexyl-3-hydroxyhexadecanoic acid)

Item no.

USP-1A06880

Unit

25 mg

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USP-1A07520

Bicyclorisperidone Chloride (3-(4-Fluoro-2-hydroxyphenyl)-1-2-(6,7,8,9-tetrahydro-2-methyl-4-oxo-4H-pyrido- [1,2-a]pyrimidin-3-yl)ethyl-2-aza-1-azoniabicyclo[2.2.2]oct-2-ene Chloride)

Item no.

USP-1A07520

Unit

25 mg

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USP-1A08520

Fluvoxamine Oxime ((E)-5-Methoxy-1-[4-(trifluoromethyl)phenyl]pentan-1-one oxime)

Item no.

USP-1A08520

Unit

25 mg

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USP-1A08850

N-Nitroso Piperazine Solution (1 mg/mL in Methanol) (1-nitrosopiperazine)

Item no.

USP-1A08850

Unit

1 mL

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USP-1A08890

N-Nitroso Cinacalcet Solution (1 mg/mL in Methanol) ((R)-N-(1-(naphthalen-1-yl)ethyl)-N-(3-(3-(trifluoromethyl)phenyl)propyl)nitrous amide)

Item no.

USP-1A08890

Unit

1 mL

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USP-1A09800

N-Nitroso Desmethyl Diltiazem Solution (1 mg/mL in Acetonitrile) ((2S,3S)-2-(4-Methoxyphenyl)-5-{2-[methyl(nitroso)amino]ethyl}-4-oxo-2,3,4,5-tetrahydrobenzo[b][1,4]thiazepin-3-yl acetate)

Item no.

USP-1A09800

Unit

1 mL

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