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Keywords: 18162-48-6 , 872-50-4 , Methylene Chloride , naphthalene , THF , Titanium Dioxide

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Pharmaceutical Impurity Reference Standards

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Structure Chemical Name CAS MF
2-Propanone, 1-(2-hydroxypropoxy)- (9CI) 2-Propanone, 1-(2-hydroxypropoxy)- (9CI) 90817-38-2 C6H12O3
Nirmatrelvir Impurity 4 Nirmatrelvir Impurity 4
Nifedipine Impurity L Nifedipine Impurity L
2-Pyrrolidinone, 3,4-dihydroxy-5-(hydroxymethyl)-, (3R,4R,5R)- (9CI) 2-Pyrrolidinone, 3,4-dihydroxy-5-(hydroxymethyl)-, (3R,4R,5R)- (9CI) 155102-96-8 C5H9NO4
Bumetanide Impurity 24 Bumetanide Impurity 24
Rocuronium Bromide Impurity 37、38、39 Rocuronium Bromide Impurity 37、38、39
Ritonavir EP Impurity HIJ Ritonavir EP Impurity HIJ
Crisaborole Impurity 42 Crisaborole Impurity 42
TRANS-4-AMINOCROTONIC ACID TRANS-4-AMINOCROTONIC ACID 38090-53-8 C4H7NO2
PeraMpanel PeraMpanel 380919-34-6 C23H17N3O2
Empagliflozin Impurity 83 Empagliflozin Impurity 83
Ambroxol Imp.O Ambroxol Imp.O 1807328-39-7 C13H12Br2N2O
Olopatadine Impurity 10 HBr Olopatadine Impurity 10 HBr 4174-83-8 C22H26Br2NP
Iohexol Impurity Q Iohexol Impurity Q
Avibactam sodium Impurity CIS Avibactam sodium Impurity CIS
Diphenidol Impurity 2 Diphenidol Impurity 2 63645-18-1 C16H17ClO
(2,5-dibromophenyl)(4-ethoxyphenyl)methanone (2,5-dibromophenyl)(4-ethoxyphenyl)methanone 1713015-63-4 C15H12Br2O2
Flucloxacillin Impurity 1 Flucloxacillin Impurity 1
Rocuronium Bromide Impurity 39 Rocuronium Bromide Impurity 39
Ticagrelor Intermediate 1 D-Tartrate Ticagrelor Intermediate 1 D-Tartrate 2376278-72-5 C14H25NO10
2-(3,5-dicyano-4-isobutoxyphenyl)-4-methylthiazole-5-carboxylic acid 2-(3,5-dicyano-4-isobutoxyphenyl)-4-methylthiazole-5-carboxylic acid 2428631-65-4 C17H15N3O3S
Roxadustat impurity ZZ5 Roxadustat impurity ZZ5 C17H12ClNO4
Lenvatinib impurity LFZZ-7 Lenvatinib impurity LFZZ-7 C11H9ClN2O2
Rosuvastatin Impurity 119 Rosuvastatin Impurity 119
Rosuvastatin Impurity 105 Rosuvastatin Impurity 105
(2R,3R,4R,5S,6R)-2-(acetoxymethyl)-6-(4-chloro-3-(4-(((S)-tetrahydrofuran-3-yl)oxy)benzyl)phenyl)tetrahydro-2H-pyran-3,4,5-triyl triacetate (2R,3R,4R,5S,6R)-2-(acetoxymethyl)-6-(4-chloro-3-(4-(((S)-tetrahydrofuran-3-yl)oxy)benzyl)phenyl)tetrahydro-2H-pyran-3,4,5-triyl triacetate 1620758-27-1 C31H35ClO11
Febuxostat Impurity 99 Febuxostat Impurity 99
Furosemide Impurity 20 Furosemide Impurity 20
1-((2S,3S)-3-(4-(4-cyanophenyl)thiazol-2-yl)-2-(2,5-difluorophenyl)-2-hydroxybutyl)-4-(1-((methyl(3-((2-(methylamino)acetoxy)methyl)pyridin-2-yl)carbamoyl)oxy)ethyl)-1H-1,2,4-triazol-4-ium 1-((2S,3S)-3-(4-(4-cyanophenyl)thiazol-2-yl)-2-(2,5-difluorophenyl)-2-hydroxybutyl)-4-(1-((methyl(3-((2-(methylamino)acetoxy)methyl)pyridin-2-yl)carbamoyl)oxy)ethyl)-1H-1,2,4-triazol-4-ium
(3R,4R,5S)-ethyl 4,5-diacetamido-3-(pentan-3-yloxy)cyclohex-1- enecarboxylate (3R,4R,5S)-ethyl 4,5-diacetamido-3-(pentan-3-yloxy)cyclohex-1- enecarboxylate 1191921-01-3 C18H30N2O5
Ticagrelor Impurity 109 Ticagrelor Impurity 109
Ticagrelor Impurity 134 Ticagrelor Impurity 134
2-Propenamide, 2-cyano-3-(3,4-dihydroxyphenyl)-N,N-diethyl-, (2E)- 2-Propenamide, 2-cyano-3-(3,4-dihydroxyphenyl)-N,N-diethyl-, (2E)- 1217439-96-7 C14H16N2O3
Benzonitrile, 4,4'-[[2,2'-bis(hydroxymethyl)[1,1'-biphenyl]-4,4'-diyl]bis(oxy)]bis- Benzonitrile, 4,4'-[[2,2'-bis(hydroxymethyl)[1,1'-biphenyl]-4,4'-diyl]bis(oxy)]bis- 2254541-79-0 C28H20N2O4
Benzoic acid, 3-(butylamino)-5-[(butylamino)sulfonyl]-4-phenoxy- Benzoic acid, 3-(butylamino)-5-[(butylamino)sulfonyl]-4-phenoxy- 28469-01-4 C21H28N2O5S
Acetamide, N-[9-[[2-(acetyloxy)-1-(hydroxymethyl)ethoxy]methyl]-6,9-dihydro-6-oxo-1H-purin-2-yl]- Acetamide, N-[9-[[2-(acetyloxy)-1-(hydroxymethyl)ethoxy]methyl]-6,9-dihydro-6-oxo-1H-purin-2-yl]- 298197-26-9 C13 H17 N5 O6
Topiroxostat Impurity 46 Topiroxostat Impurity 46
Topiroxostat Impurity 43 Topiroxostat Impurity 43
N-(2-(1-hydroxycyclohexyl)-2-(4-methoxyphenyl)ethyl)-N-methyl formamide N-(2-(1-hydroxycyclohexyl)-2-(4-methoxyphenyl)ethyl)-N-methyl formamide 1643948-40-6 C17H25NO3
Regorafenib Impurity 40 Regorafenib Impurity 40
3-Quinolinecarboxylic acid, 1-cyclopropyl-7-fluoro-1,4-dihydro-6,8-dimethoxy-4-oxo-, ethyl ester 3-Quinolinecarboxylic acid, 1-cyclopropyl-7-fluoro-1,4-dihydro-6,8-dimethoxy-4-oxo-, ethyl ester 2489671-14-7 C17H18FNO5
Bisoprolol Impurity 17 Bisoprolol Impurity 17 109791-19-7 C15H23NO5
Furosemide Impurity 5 Furosemide Impurity 5 518336-22-6 C12H10ClNO3
Lumateperone Impurity 2 Lumateperone Impurity 2 313544-32-0 C16H19N3O3
Pramipexole Impurity 55 Pramipexole Impurity 55 959012-83-0 C8H11NO2
INDEX NAME NOT YET ASSIGNED INDEX NAME NOT YET ASSIGNED 2438857-80-6 C27H22F2N6O5
Nicergoline Impurity 01 Nicergoline Impurity 01
impurity 38 impurity 38
Aprepitant impurity 1 Aprepitant impurity 1
Benzonitrile, 4-[3-[(acetyloxy)methyl]-4-bromophenoxy]- Benzonitrile, 4-[3-[(acetyloxy)methyl]-4-bromophenoxy]- 2227126-09-0 C16H12BrNO3
3-Pyridineacrylonitrile, α-(m-chlorophenyl)-β-hydroxy- (8CI) 3-Pyridineacrylonitrile, α-(m-chlorophenyl)-β-hydroxy- (8CI) 18206-80-9 C14H9ClN2O
Androsta-3,16-dien-17-ol, acetate, (5α)- (9CI) Androsta-3,16-dien-17-ol, acetate, (5α)- (9CI) 103088-58-0 C21H30O2
1-Naphthalenamine, 1,2,3,4-tetrahydro-N-methyl-4-phenyl-, (1S,4S)- 1-Naphthalenamine, 1,2,3,4-tetrahydro-N-methyl-4-phenyl-, (1S,4S)- 91797-61-4 C17H19N
2-Pyridineethanamine, N-methyl-N-nitroso- 2-Pyridineethanamine, N-methyl-N-nitroso- 32635-81-7 C8H11N3O
2-AMino-5-(trifluoroMethoxy)phenyl Thiocyanate 2-AMino-5-(trifluoroMethoxy)phenyl Thiocyanate 1391054-04-8 C8H5F3N2OS
2-(2-Ethoxyphenoxy)ethyl Methanesulfonate 2-(2-Ethoxyphenoxy)ethyl Methanesulfonate 169506-15-4 C11H16O5S
1-(5-(benzyloxy)-2-hydroxy-3-nitrophenyl)ethanone 1-(5-(benzyloxy)-2-hydroxy-3-nitrophenyl)ethanone 861841-94-3 C15H13NO5
acetylated penicilloic acids of piperacillin acetylated penicilloic acids of piperacillin
Atorvastatin Dehydro Lactone Atorvastatin Dehydro Lactone 442851-50-5 C33H31FN2O3
penicilloic acids of piperacillin penicilloic acids of piperacillin
BJQMFFOQQWEWAF-DGBYXFBUSA-N BJQMFFOQQWEWAF-DGBYXFBUSA-N 1709825-83-1 C31H41ClO8
3-Oxo Atorvastatin tert-Butyl Ester 3-Oxo Atorvastatin tert-Butyl Ester 134394-98-2 C37H41FN2O5
(1S,2S,3R,5S)-3-(7-(((1R,2S)-2-(4-fluorophenyl)cyclopropyl)amino)-5-(propylthio)-3H-[1,2,3]triazolo[4,5-d]pyrimidin-3-yl)-5-(2-hydroxyethoxy)cyclopentane-1,2-diol (1S,2S,3R,5S)-3-(7-(((1R,2S)-2-(4-fluorophenyl)cyclopropyl)amino)-5-(propylthio)-3H-[1,2,3]triazolo[4,5-d]pyrimidin-3-yl)-5-(2-hydroxyethoxy)cyclopentane-1,2-diol C23H29FN6O4S
(5-Ethyl-1H-imidazol-4-yl)methanol (5-Ethyl-1H-imidazol-4-yl)methanol 38603-74-6 C6H10N2O
(Z)-1-(6-methylpyridin-3-yl)-2-(4-(methylsulfonyl)phenyl)ethanone oxime (Z)-1-(6-methylpyridin-3-yl)-2-(4-(methylsulfonyl)phenyl)ethanone oxime 1810761-43-3 C15H16N2O3S
tert-butyl 2-((4R,6S)-6-(2-aminoethyl)-2,2-dimethyl-1,3-dioxan-4-yl)acetate tert-butyl 2-((4R,6S)-6-(2-aminoethyl)-2,2-dimethyl-1,3-dioxan-4-yl)acetate C14H27NO4
Apixaban Impurity A Apixaban Impurity A
ethylidene phthalide ethylidene phthalide 61658-90-0 C10H8O2
6-amino-2-(1-(2-fluorobenzyl)-1H-pyrazolo[3,4-b]pyridin-3-yl) -7-methyl-7,9-dihydro-8H-purin-8-one 6-amino-2-(1-(2-fluorobenzyl)-1H-pyrazolo[3,4-b]pyridin-3-yl) -7-methyl-7,9-dihydro-8H-purin-8-one 1361569-18-7 C19H15FN8O
5-(TRIFLUOROMETHYL)-3-P-TOLYL-1H-PYRAZOLE 5-(TRIFLUOROMETHYL)-3-P-TOLYL-1H-PYRAZOLE 219986-64-8 C11H9F3N2
LORATADINE IMPURITY F LORATADINE IMPURITY F C22H23ClN2O2
ZIDOVUDINE IMPURITY A ZIDOVUDINE IMPURITY A
Propanoic acid, 2-[[(Z)-[1-(2-amino-4-thiazolyl)-2-[[(2S,3S)-2-methyl-4-oxo-1-sulfo-3-azetidinyl]amino]-2-oxoethylidene]amino]oxy]-2-methyl-, 1-(1,1-dimethylethyl) ester Propanoic acid, 2-[[(Z)-[1-(2-amino-4-thiazolyl)-2-[[(2S,3S)-2-methyl-4-oxo-1-sulfo-3-azetidinyl]amino]-2-oxoethylidene]amino]oxy]-2-methyl-, 1-(1,1-dimethylethyl) ester 330944-50-8 C17H25N5O8S2
Canagliflozin Peroxide Impurity Canagliflozin Peroxide Impurity 2247196-28-5 C24H25FO7S
(αR)-α-Methyl-N-[3-[3-(trifluoromethyl)phenyl]propyl]-2-naphthalenemethanamine Hydrochloride (αR)-α-Methyl-N-[3-[3-(trifluoromethyl)phenyl]propyl]-2-naphthalenemethanamine Hydrochloride 2200269-28-7 C22H23ClF3N
2-(4-Fluorophenyl)-δ-hydroxy-5-(1-methylethyl)-β-oxo-3-phenyl-4-[(phenylamino)carbonyl]-1H-pyrrole-1-heptanoic Acid 1,1-Dimethylethyl Ester 2-(4-Fluorophenyl)-δ-hydroxy-5-(1-methylethyl)-β-oxo-3-phenyl-4-[(phenylamino)carbonyl]-1H-pyrrole-1-heptanoic Acid 1,1-Dimethylethyl Ester 947262-20-6 C37H41FN2O5
Atorvastatin Impurity E Intermediate Atorvastatin Impurity E Intermediate
Ceftazidime Double Mother Nucleus Impurity Ceftazidime Double Mother Nucleus Impurity
Cefuroxime Sodium Trans Impurity I，(E)-Cefuroxime Sodium Impurity I Cefuroxime Sodium Trans Impurity I，(E)-Cefuroxime Sodium Impurity I
Faropenem Degradation Impurity B Faropenem Degradation Impurity B
2-chloro-1-(5-isopropoxy-5H-chromeno[2,3-b]pyridin-7-yl)propan-1-one 2-chloro-1-(5-isopropoxy-5H-chromeno[2,3-b]pyridin-7-yl)propan-1-one
Oxacillin Impurity 1 Oxacillin Impurity 1 36231-30-8 C19H19N3O6S
Brivaracetam Impurity 33 Brivaracetam Impurity 33
Arformoterol Impurity 24 Arformoterol Impurity 24 477552-93-5 C19H24N2O3
Pregabalin Impurity 99 Pregabalin Impurity 99 949890-75-9 C16H23NO4
Roxatidine Impurity 9 Roxatidine Impurity 9 87327-60-4 C4H6O4
Peramivir Impurity 45 Peramivir Impurity 45
Pentanamide, 5-(diphenylphosphinyl)-N-ethyl- Pentanamide, 5-(diphenylphosphinyl)-N-ethyl- 2512198-63-7 C19H24NO2P
1H-Pyrido[3',4':4,5]pyrrolo[1,2,3-de]quinoxaline-8(7H)-carboxylic acid, 2,3,6b,9,10,10a-hexahydro-, ethyl ester, (6bR,10aS)- 1H-Pyrido[3',4':4,5]pyrrolo[1,2,3-de]quinoxaline-8(7H)-carboxylic acid, 2,3,6b,9,10,10a-hexahydro-, ethyl ester, (6bR,10aS)- 313369-17-4 C16H21N3O2
Ergoline-8-methanol, 10-hydroxy-1,6-dimethyl-, 8-(5-bromo-3-pyridinecarboxylate), (8β)- Ergoline-8-methanol, 10-hydroxy-1,6-dimethyl-, 8-(5-bromo-3-pyridinecarboxylate), (8β)- 57935-66-7 C23H24BrN3O3
(5S,6S,7S)-7-(2-(1H-tetrazol-1-yl)acetamido)-3-(((5-methyl-1,3,4- thiadiazol-2-yl)thio)methyl)-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2- ene-2-carboxylic acid 5-oxide (5S,6S,7S)-7-(2-(1H-tetrazol-1-yl)acetamido)-3-(((5-methyl-1,3,4- thiadiazol-2-yl)thio)methyl)-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2- ene-2-carboxylic acid 5-oxide
Ethanone, 2-chloro-1-[3-nitro-4-(phenylmethoxy)phenyl]- Ethanone, 2-chloro-1-[3-nitro-4-(phenylmethoxy)phenyl]- 871266-45-4 C15H12ClNO4
Benzeneethanamine, N-[2-(3,4-dimethoxyphenyl)ethyl]-3,4-dimethoxy- Benzeneethanamine, N-[2-(3,4-dimethoxyphenyl)ethyl]-3,4-dimethoxy- 24997-88-4 C20H27NO4
1H-Pyrazolo[3,4-c]pyridine-3-carboxamide, 4,5,6,7-tetrahydro-1-(4-methoxyphenyl)-6-(4-nitrophenyl)-7-oxo- 1H-Pyrazolo[3,4-c]pyridine-3-carboxamide, 4,5,6,7-tetrahydro-1-(4-methoxyphenyl)-6-(4-nitrophenyl)-7-oxo- 1642569-42-3 C20H17N5O5
1H-Pyrazolo[3,4-c]pyridine-3-carboxamide, 4,5,6,7-tetrahydro-1-(4-methoxyphenyl)-6-(4-nitrophenyl)-7-oxo- 1H-Pyrazolo[3,4-c]pyridine-3-carboxamide, 4,5,6,7-tetrahydro-1-(4-methoxyphenyl)-6-(4-nitrophenyl)-7-oxo- 1642569-42-3 C20H17N5O5
Avatrombopag Impurity 23 Avatrombopag Impurity 23
Avatrombopag Impurity 34 Avatrombopag Impurity 34
Cisatracurium besylate impurity11 Cisatracurium besylate impurity11
(3R,5S,E)-tert-butyl 7-(4-(2-fluorophenyl)-6-isopropyl-2-(N-methyl methylsulfonamido)pyrimidin-5-yl)-3,5-dihydroxyhept-6-enoate (3R,5S,E)-tert-butyl 7-(4-(2-fluorophenyl)-6-isopropyl-2-(N-methyl methylsulfonamido)pyrimidin-5-yl)-3,5-dihydroxyhept-6-enoate
Acetamide, N-?[4-?[5-?(acetylamino)?-?2-?hydroxyphenoxy]?phenyl]?- Acetamide, N-?[4-?[5-?(acetylamino)?-?2-?hydroxyphenoxy]?phenyl]?- 2575516-61-7 C16H16N2O4
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