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Pharmaceutical Impurity Reference Standards

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Structure Chemical Name CAS MF
FG-4592 intermediate 8 FG-4592 intermediate 8 1509958-20-6 C20H17NO6
Parecoxib Sodium Imp.E Parecoxib Sodium Imp.E
Trelagliptin Impurity 7 Trelagliptin Impurity 7
Ofloxacin/Levofloxacin Impurity B Ofloxacin/Levofloxacin Impurity B
Pramipexole impurity II Pramipexole impurity II
(2S,5R)-3α-Chloromethyl-3-methyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2β-carboxylic acid benzhydryl ester (2S,5R)-3α-Chloromethyl-3-methyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2β-carboxylic acid benzhydryl ester 85573-73-5 C21H20ClNO3S
2-Propylidenepropanedinitrile 2-Propylidenepropanedinitrile 52833-34-8 C6H6N2
4,4'-Dihydroxyazoxybenzene 4,4'-Dihydroxyazoxybenzene 15596-57-3 C12H10N2O3
5-[[(2-Aminoethyl)thio]methyl]-N,N-dimethyl-2-furfurylamine 5-[[(2-Aminoethyl)thio]methyl]-N,N-dimethyl-2-furfurylamine 66356-53-4 C10H18N2OS
2-[2-(2-METHOXY-PHENOXY)-ETHYL]-ISOINDOLE-1,3-DIONE 2-[2-(2-METHOXY-PHENOXY)-ETHYL]-ISOINDOLE-1,3-DIONE 26646-63-9 C17H15NO4
(3AS,7AS)-HEXAHYDRO-1H-ISOINDOLE-1,3(2H)-DIONE (3AS,7AS)-HEXAHYDRO-1H-ISOINDOLE-1,3(2H)-DIONE 117307-09-2 C8H11NO2
Amifostine Thiol Dihydrochloride Amifostine Thiol Dihydrochloride 14653-77-1 C5H14N2S
Butyl Itraconazole Butyl Itraconazole 89848-51-1 C35H38Cl2N8O4
Betamethasone 9,11-Epoxide Propionate Betamethasone 9,11-Epoxide Propionate 205105-83-5 C25H32O6
8-Methoxyquinolin-2(1H)-one 8-Methoxyquinolin-2(1H)-one 22614-69-3 C10H9NO2
7-Bromo Epinastine 7-Bromo Epinastine 1217052-16-8 C16H14BrN3
1,3-Bis[4-(2-methoxyethyl)phenoxy]- 1,3-Bis[4-(2-methoxyethyl)phenoxy]- 230975-30-1 C21H28O5
5-Deshydroxymethyl-5-chloro Losartan (Losartan Impurity K) 5-Deshydroxymethyl-5-chloro Losartan (Losartan Impurity K) 1159977-26-0 C21H20Cl2N6
Capecitabine Related Compound B Capecitabine Related Compound B
lamivudine sulfoxide lamivudine sulfoxide 160552-55-6 C8H11N3O4S
Vitamin B12 e-Monocarboxylic Acid Vitamin B12 e-Monocarboxylic Acid 26264-28-8 C63H87CoN13O15P
caffeidine caffeidine 20041-90-1 C7H12N4O
metreleptin metreleptin 186018-45-1
3,5-DIIODO-4'-(4-HYDROXYPHENOXY)BENZOIC ACID 3,5-DIIODO-4'-(4-HYDROXYPHENOXY)BENZOIC ACID 2055-97-2 C13H6I4O4
Sotalol EP Impurity A Sotalol EP Impurity A 16974-42-8 C12H20N2O2S
digoxigenin-mono(digitoxoside) digoxigenin-mono(digitoxoside) 5352-63-6 C29H44O8
W 36017 W 36017 21236-54-4 C12H18N2O
ONO EI-601 ONO EI-601 155023-59-9 C15H14N2O6S
norchlorpromazine norchlorpromazine 1225-64-5 C16H17ClN2S
ETHYLISOPROPYLNITROSAMINE ETHYLISOPROPYLNITROSAMINE 16339-04-1 C5H12N2O
1,3,5,7-Tetrmethyl-adamantane 1,3,5,7-Tetrmethyl-adamantane 1687-36-1 C14H24
4-[1-(hydroxyamino)ethylidene]cyclohexa-2,5-dien-1-one 4-[1-(hydroxyamino)ethylidene]cyclohexa-2,5-dien-1-one 34523-34-7 C8H9NO2
Methyl 4-(4'-fluorophenyl)-2-(cyclopropyl)-3-quinolinecarboxylate Methyl 4-(4'-fluorophenyl)-2-(cyclopropyl)-3-quinolinecarboxylate 121659-86-7 C20H16FNO2
Silodosin Silodosin 160970-64-9 C25H32F3N3O4
3-phenylpyrazin-2-ol 3-phenylpyrazin-2-ol 73200-73-4 C10H8N2O
1-(Isopropylamino)-3-(4-methylphenoxy)propane-2-ol 1-(Isopropylamino)-3-(4-methylphenoxy)propane-2-ol 5790-46-5 C13H21NO2
5H-Dibenz[b,f]azepine-10,11-dione 5H-Dibenz[b,f]azepine-10,11-dione 19579-83-0 C14H9NO2
Ethanesulfonic acid ethyl ester Ethanesulfonic acid ethyl ester 1912-30-7 C4H10O3S
DONEPEZIL HYDROCHLORIDE DONEPEZIL HYDROCHLORIDE 110119-84-1 C24H30ClNO3
Desfluoro Fluvoxamine Desfluoro Fluvoxamine 1217214-94-2 C15H22F2N2O2
Nilotinib N-Oxide Nilotinib N-Oxide 1246817-85-5 C28H22F3N7O2
Bis[(2-guanidino-4-thiazolyl)methyl]disulfide Bis[(2-guanidino-4-thiazolyl)methyl]disulfide 129083-44-9 C10H14N8S4
N-[(1R,3r,5S)-9-azabicyclo[3.3.1]non-3-yl]-1-Methyl-1H-indazole-3-carboxaMide hydrochloride N-[(1R,3r,5S)-9-azabicyclo[3.3.1]non-3-yl]-1-Methyl-1H-indazole-3-carboxaMide hydrochloride 141136-01-8 C17H23ClN4O
BIRG 616 BS BIRG 616 BS 287980-84-1 C12H10N4O
3-AMino-4-(2-chlorophenyl)-6-nitro-2(1H)-quinolinone 3-AMino-4-(2-chlorophenyl)-6-nitro-2(1H)-quinolinone 55198-89-5 C15H10ClN3O3
3-Dehydroxy-3-oxo-4,5-dihydro OxazepaM 3-Dehydroxy-3-oxo-4,5-dihydro OxazepaM 19554-95-1 C15H11ClN2O2
8-DeMethyl Ivabradine 8-DeMethyl Ivabradine 304464-97-9 C26H34N2O5
CitalopraM DiMethylaMinobutanone CitalopraM DiMethylaMinobutanone 1329745-98-3 C25H33FN2O2
DesMethyl Erlotinib Carboxylate Acid DesMethyl Erlotinib Carboxylate Acid 882172-60-3 C21H19N3O5
[[4-[(3-Methylphenyl)aMino]-3-pyridinyl]sulfonyl]carbaMic Acid Ethyl Ester [[4-[(3-Methylphenyl)aMino]-3-pyridinyl]sulfonyl]carbaMic Acid Ethyl Ester 72810-57-2 C15H17N3O4S
12-Hydroxy Irinotecan 12-Hydroxy Irinotecan 185336-12-3 C33H38N4O7
Losartan IsoMer IMpurity, PotassiuM Salt Losartan IsoMer IMpurity, PotassiuM Salt 860644-28-6 C22H22ClKN6O
PidotiMod Diketopiperazine-6-propanoic Acid PidotiMod Diketopiperazine-6-propanoic Acid 161771-75-1 C9H12N2O4S
RofluMilast N-Oxide RofluMilast N-Oxide 292135-78-5 C17H14Cl2F2N2O4
(3S)-6,6-DIBROMO-2,2-DIMETHYLPENAM-3-CARBOXYLIC ACID 1,1-DIOXIDE (3S)-6,6-DIBROMO-2,2-DIMETHYLPENAM-3-CARBOXYLIC ACID 1,1-DIOXIDE 76646-91-8 C8H9Br2NO5S
(S)-Citalopram N-Oxide (S)-Citalopram N-Oxide 917482-45-2 C20H21FN2O2
7-Epi-docetaxel (Docetaxel Impurity C) 7-Epi-docetaxel (Docetaxel Impurity C) 153381-68-1 C43H53NO14
Amido Methyl Meloxicam (Meloxicam Impurity) Amido Methyl Meloxicam (Meloxicam Impurity) 892395-41-4 C15H15N3O4S2
DESETHYLENE CIPROFLOXACIN DESETHYLENE CIPROFLOXACIN 103222-12-4 C15H16FN3O3
2-aminobutanenitrile 2-aminobutanenitrile 40651-89-6 C4H8N2
4-Nitrofluorobenzol 4-Nitrofluorobenzol 352-15-8 C6H4FNO
propyl[2,6'-bi-1H-benzimidazol]-1'-yl]methyl]- propyl[2,6'-bi-1H-benzimidazol]-1'-yl]methyl]- 144702-27-2 C33H29N5
4-(2-Hydroxy-3-isopropylaminopropoxy)benzoic Acid 4-(2-Hydroxy-3-isopropylaminopropoxy)benzoic Acid 72570-70-8 C13H19NO4
Fluvoxamino Acid Fluvoxamino Acid 192876-02-1 C14H19F3N2O2
3,5-androstadien-17-one 3,5-androstadien-17-one 1912-63-6 C19H26O
AzithroMycin IMpurity J AzithroMycin IMpurity J
EsMolol Acid SodiuM Salt EsMolol Acid SodiuM Salt 83356-60-9 C15H22NNaO4
Thyroxine Ethyl Ester Thyroxine Ethyl Ester 76353-71-4 C17H15I4NO4
(4-Chlorophenyl)[4-(1-Methylethoxy)phenyl]Methanone (Fenofibrate IMpurity) (4-Chlorophenyl)[4-(1-Methylethoxy)phenyl]Methanone (Fenofibrate IMpurity) 154356-96-4 C16H15ClO2
5-Acetyl Rhein 5-Acetyl Rhein 875535-35-6 C17H10O7
7'-Methyl-2'-propyl-1H,3'H-2,5'-bibenzo[d]iMidazole 7'-Methyl-2'-propyl-1H,3'H-2,5'-bibenzo[d]iMidazole 884330-09-0 C18H18N4
5-Des[2-(tert-butylaMino)] BaMbuterol-5-ethanol 5-Des[2-(tert-butylaMino)] BaMbuterol-5-ethanol 112935-93-0 C14H20N2O5
Deoxy Fesoterodine Deoxy Fesoterodine 895137-81-2 C26H37NO2
Bisacodyl Related Compound C (20 mg) (4-[(4-Hydroxyphenyl)(pyridin-2-yl)methyl]phenyl acetate) Bisacodyl Related Compound C (20 mg) (4-[(4-Hydroxyphenyl)(pyridin-2-yl)methyl]phenyl acetate) 72901-16-7 C20H17NO3
(6R,7R)-7-((Z)-2-(2-aMinothiazol-4-yl)-2-(hydroxyiMino)acetaMido)-8-oxo-3-vinyl-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid 5-oxide (6R,7R)-7-((Z)-2-(2-aMinothiazol-4-yl)-2-(hydroxyiMino)acetaMido)-8-oxo-3-vinyl-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid 5-oxide 934986-48-8 C14H13N5O6S2
(2S)-1-[(2S)-2-Methyl-3-Methylsulfinylpropanoyl]pyrrolidine-2-carboxylic acid (2S)-1-[(2S)-2-Methyl-3-Methylsulfinylpropanoyl]pyrrolidine-2-carboxylic acid 78636-31-4 C14H22N2O6S2
Mixture of diastereoisoMers of (6S)-6-N-[3-[(6S)-2-aMino-4,5, 6,7-tetrahydro-1,3-benzothiazol-6-yl]-1-ethyl-2-Methylpropyl]- 4,5,6,7-tetrahydro-1,3-benzothiazole-2,6-diaMine Mixture of diastereoisoMers of (6S)-6-N-[3-[(6S)-2-aMino-4,5, 6,7-tetrahydro-1,3-benzothiazol-6-yl]-1-ethyl-2-Methylpropyl]- 4,5,6,7-tetrahydro-1,3-benzothiazole-2,6-diaMine
penilloic acids of piperacillin penilloic acids of piperacillin
2-PyrazinecarboxaMide, 6-nitro-3,4-dihydro-3-oxo- 2-PyrazinecarboxaMide, 6-nitro-3,4-dihydro-3-oxo- 259793-97-0 C5H4N4O4
Methyl 3-aMino-2-((2'-carbaMoylbiphenyl-4-yl)MethylaMino)benzoate Methyl 3-aMino-2-((2'-carbaMoylbiphenyl-4-yl)MethylaMino)benzoate 147404-75-9 C22H21N3O3
3-Methyl cefdinir 3-Methyl cefdinir 71091-93-5 C13H13N5O5S2
3-Methyl- N-[4-trifluo- roMethyl) phenyl]-4- isoxazole carboxaMide 3-Methyl- N-[4-trifluo- roMethyl) phenyl]-4- isoxazole carboxaMide
2-[[[4-(2,2,2-Trifluoroethoxy)-3-Methyl-1-oxopyridin-2-yl]Methyl]sulfanyl]-1H-benziMidazole 2-[[[4-(2,2,2-Trifluoroethoxy)-3-Methyl-1-oxopyridin-2-yl]Methyl]sulfanyl]-1H-benziMidazole 163119-30-0 C16H14F3N3O2S
(11β,16β)-9-BroMo-11-hydroxy-16-Methyl-17,21-bis(1-oxopropoxy)pregna-1,4-diene-3,20-dione (11β,16β)-9-BroMo-11-hydroxy-16-Methyl-17,21-bis(1-oxopropoxy)pregna-1,4-diene-3,20-dione 52092-14-5 C28H37BrO7
3-((3S,4R)-4-Methyl-3-(Methyl(7H-pyrrolo[2,3-d]pyriMidin-4-yl)aMino)piperidin-1-yl)-3-oxopropanenitrile 3-((3S,4R)-4-Methyl-3-(Methyl(7H-pyrrolo[2,3-d]pyriMidin-4-yl)aMino)piperidin-1-yl)-3-oxopropanenitrile 1092578-48-7 C16H20N6O
4-aMino-5-chloro-2,3-dihydro-N-4-piperidinyl-7-BenzofurancarboxaMide 4-aMino-5-chloro-2,3-dihydro-N-4-piperidinyl-7-BenzofurancarboxaMide 137211-64-4 C14H18ClN3O2
(1S,3S,4R)-Entecavir (1S,3S,4R)-Entecavir 1367369-79-6 C12H15N5O3
Prasugrel Impurity III Prasugrel Impurity III 1391194-50-5 C20H20FNO3S
Bendamustine Deschloro Dimer Impurity Bendamustine Deschloro Dimer Impurity 1391052-61-1 C32H44N6O7
Benzenepropanoic acid, β-aMino-α-hydroxy-, Methyl ester, (αR,βR)- Benzenepropanoic acid, β-aMino-α-hydroxy-, Methyl ester, (αR,βR)- 157722-44-6 C10H13NO3
Benzenebutanoicacid,b-aMino-2,4,5-trifluoro-,Methylester,(bR)- Benzenebutanoicacid,b-aMino-2,4,5-trifluoro-,Methylester,(bR)- 881995-69-3 C11H12F3NO2
Avanafil iMpurity 2 Avanafil iMpurity 2
Bisoprolol IMpurity Bisoprolol IMpurity 2226263-67-6 C18H31NO4
Decitabine iMpurity 5 Decitabine iMpurity 5
Erlotinib iMpurity 3 Erlotinib iMpurity 3 328528-74-1 C20H22BrN3O4
LevetiracetaM IMpurity 3 LevetiracetaM IMpurity 3 1543353-92-9 C8H15NO4
(3R,4R,5R)-4-(1-Ethylpropoxy)-3-hydroxy-5-[(Methylsulfonyl)oxy]-1-cyclohexene-1-carboxylic Acid Ethyl Ester (3R,4R,5R)-4-(1-Ethylpropoxy)-3-hydroxy-5-[(Methylsulfonyl)oxy]-1-cyclohexene-1-carboxylic Acid Ethyl Ester 204254-94-4 C15H26O7S
9,11-Anhydrobudesonide 9,11-Anhydrobudesonide 313474-58-7 C25H32O5
iperazineacetic acid, 4-[(4- chlorophenyl)phenylMethyl]- iperazineacetic acid, 4-[(4- chlorophenyl)phenylMethyl]- 113740-61-7 C19H21ClN2O2
EveroliMus-d4 EveroliMus-d4 1338452-54-2 C53H79D4NO14
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