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Pharmaceutical Impurity Reference Standards

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Structure Chemical Name CAS MF
Alogliptin Impurity 17 Alogliptin Impurity 17
Aprepitant Impurity 15 Aprepitant Impurity 15 1447693-83-5 C20H19ClF7NO2
Betamethasone EP Impurity H Betamethasone EP Impurity H 185613-71-2 C22H29FO5
Blonanserin Impurity 10 Blonanserin Impurity 10 132810-87-8 C23H30ClN3
Blonanserin impurity G Blonanserin impurity G
Cefodizime Impurity 5 Cefodizime Impurity 5
Clindamycin Impurity 4 Clindamycin Impurity 4
Doxofylline Impurity 4 Doxofylline Impurity 4 2095554-12-2 C11H16N4O5
Eltrombopag Impurity 1 Eltrombopag Impurity 1 1246929-02-1 C25H23N5O3
Everolimus impurity A Everolimus impurity A
Fosaprepitant Impurity 13 Fosaprepitant Impurity 13
Gefitinib Impurity J Gefitinib Impurity J
Isavuconazole Impurity 23 Isavuconazole Impurity 23
Isavuconazole Impurity 29 Isavuconazole Impurity 29
Isavuconazole Impurity 7 Isavuconazole Impurity 7
Lercanidipine Impurity 6 Lercanidipine Impurity 6 786625-22-7 C37H43N3O6
Linagliptin Impurity 43 Linagliptin Impurity 43
MiraBegron Impurity A MiraBegron Impurity A
Moxifloxacin Impurity 15 Moxifloxacin Impurity 15
Moxifloxacin Impurity 32 Moxifloxacin Impurity 32
Nifedipine Impurity F Nifedipine Impurity F 53055-15-5 C18H20N2O6
Olaparib Impurity 15 Olaparib Impurity 15 2250243-17-3 C24H25FN4O3
Olopatadine Impurity 4 Olopatadine Impurity 4 55690-15-8 C18H18O5
Posaconazole Impurity 26 Posaconazole Impurity 26
Posaconazole Impurity 48 Posaconazole Impurity 48 1902954-03-3 C37H42F2N8O5
Posaconazole Impurity 9 Posaconazole Impurity 9
Roxithromycin Impurity E Roxithromycin Impurity E
SofosBuvir impurity 48 SofosBuvir impurity 48
SofosBuvir Impurity 54 SofosBuvir Impurity 54 1431932-81-8 C12H17ClNO4P
Timolol EP Impurity G Timolol EP Impurity G 75202-36-7 C6H9N3O3S
Tofacitinib Impurity 44 Tofacitinib Impurity 44 2374700-39-5 C13H19N5
Trelagliptin Impurity 24 Trelagliptin Impurity 24
dimethyl 3- isobutylpentanedioate dimethyl 3- isobutylpentanedioate 145328-03-6 C11H20O4
Phenol, 4-chloro-3-[(4-ethoxyphenyl)methyl]- Phenol, 4-chloro-3-[(4-ethoxyphenyl)methyl]- 1408077-50-8 C15H15ClO2
2-amino-9-((3aS,4S,6S,6aR)-3a,6-dihydroxyhexahydro-1H-cyclopenta[c]furan-4-yl)-1,9-dihydro-6H-purin-6-one 2-amino-9-((3aS,4S,6S,6aR)-3a,6-dihydroxyhexahydro-1H-cyclopenta[c]furan-4-yl)-1,9-dihydro-6H-purin-6-one 1984788-96-6 C12H15N5O4
Ampicillin Impurity C Ampicillin Impurity C
Ampicillin Impurity O Ampicillin Impurity O
mixture of PD 312236 and PD 312237 mixture of PD 312236 and PD 312237
Axitinib Impurity 27 Axitinib Impurity 27 1639137-80-6 C24H20N4O2S
(4R,5R,6S)-4-nitrobenzyl 6-((R)-1-hydroxyethyl)-4-methyl-3,7-dioxo-1-azabicyclo[3.2.0]heptane-2-carboxylate (4R,5R,6S)-4-nitrobenzyl 6-((R)-1-hydroxyethyl)-4-methyl-3,7-dioxo-1-azabicyclo[3.2.0]heptane-2-carboxylate 104873-15-6 C17H18N2O7
Lesinurad Impurity Lesinurad Impurity
Chrysophanol triglucoside Chrysophanol triglucoside 120181-07-9 C33H40O19
7H-Pyrazolo[4,3-d]pyrimidin-7-one, 5-(5-chloro-2-ethoxyphenyl)-1,6-dihydro-1-methyl-3-propyl- 7H-Pyrazolo[4,3-d]pyrimidin-7-one, 5-(5-chloro-2-ethoxyphenyl)-1,6-dihydro-1-methyl-3-propyl- 1829588-57-9 C17H19ClN4O2
Cefminox sodium impurities Ⅲ Cefminox sodium impurities Ⅲ
Canagliflozin Impurity 18 Canagliflozin Impurity 18 1951467-29-0 C24H25FO6S
Fosaprepitant Impurity 6 Fosaprepitant Impurity 6 327623-34-7 C21H19F6NO3
Ivabradine Impurity 16 HCl Ivabradine Impurity 16 HCl 304464-98-0 C26H34N2O5
Moxifloxacin EP Impurity A HCl Moxifloxacin EP Impurity A HCl
Paroxetine EP Impurity H HCl Paroxetine EP Impurity H HCl 503834-41-1 C19H23ClFNO
Solifenacin Related Compound 13 Solifenacin Related Compound 13 1251905-45-9 C17H17NO2
1-(3-fluorobenzyl)-1H-pyrazolo[3,4-b]pyridine-3-carboximidamide 1-(3-fluorobenzyl)-1H-pyrazolo[3,4-b]pyridine-3-carboximidamide 2101651-50-5 C14H12FN5
N1-(4-chlorophenyl)-3,12-diimino-N14-phenyl-2,4,11,13-Tetraazatetradecanediimidamide N1-(4-chlorophenyl)-3,12-diimino-N14-phenyl-2,4,11,13-Tetraazatetradecanediimidamide 152504-12-6 C22H31ClN10
Ethylmethyl-carbamic chloride Ethylmethyl-carbamic chloride 42252-34-6 C4H8ClNO
Cisatracurium-20-methyl Dibenzenesulfonate Cisatracurium-20-methyl Dibenzenesulfonate 1193104-85-6 C60H79N2O15S+
Oxaliplatin impurity Oxaliplatin impurity
NiMesulide EP IMpurity NiMesulide EP IMpurity 38880-53-4 C7H8N2O5S
Alogliptin Impurity D Alogliptin Impurity D 1926163-25-8 C61H86N16O13
Moxifloxacin Impurities Moxifloxacin Impurities
Parecoxib Impurity K Parecoxib Impurity K 198471-69-1 C17H16N2O3S
Linagliptin Impurity K Linagliptin Impurity K 1638744-06-5 C25H29BrN8O2
(R)-2-((6-(3-((3-(2-cyano-5-fluorobenzyl)-1-methyl-2,6-dioxo-1,2,3,6-tetrahydropyrimidin-4-yl)amino)piperidin-1-yl)-3-methyl-2,4-dioxo-3,4-dihydropyrimidin-1(2H)-yl)methyl)-4-fluorobenzonitrile (R)-2-((6-(3-((3-(2-cyano-5-fluorobenzyl)-1-methyl-2,6-dioxo-1,2,3,6-tetrahydropyrimidin-4-yl)amino)piperidin-1-yl)-3-methyl-2,4-dioxo-3,4-dihydropyrimidin-1(2H)-yl)methyl)-4-fluorobenzonitrile 1917324-13-0 C31H28F2N8O4
L-Phenylalanine, N-[(5,7-dichloro-1,2,3,4-tetrahydro-6-isoquinolinyl)carbonyl]-3-(methylsulfonyl)-, phenylmethyl ester, hydrochloride (1:1) L-Phenylalanine, N-[(5,7-dichloro-1,2,3,4-tetrahydro-6-isoquinolinyl)carbonyl]-3-(methylsulfonyl)-, phenylmethyl ester, hydrochloride (1:1) 1194550-65-6 C27H27Cl3N2O5S
Alogliptin Related Compound 23 Alogliptin Related Compound 23 1618644-29-3 C20H13ClN4O2
Etoricoxib Impurity 14 Etoricoxib Impurity 14
Riociguat Impurtiy 3 Riociguat Impurtiy 3
Trelagliptin Impurity 2 Trelagliptin Impurity 2
Chlorhexidine Impurity B Chlorhexidine Impurity B 1308292-89-8 C16H26ClN9O
Dapoxetine Impurity D Dapoxetine Impurity D
Eltrombopag Impurity 5 Eltrombopag Impurity 5
Exemestane Impurity 1 Exemestane Impurity 1 159354-61-7 C20H24O3
Iguratimod Impurity 9 Iguratimod Impurity 9 1179354-65-4 C18H16N2O6S
Lidocaine Impurity Lidocaine Impurity 35891-84-0 C11H16N2O.ClH
Pramipexole Impurity J Pramipexole Impurity J
Solifenacin Related Compound 14 Solifenacin Related Compound 14 605696-10-4 C25H30N2O2
4-amino-1-((2R,3R,5S)-2-(hydroxymethyl)-3-oxido-1,3-oxathiolan-5-yl)pyrimidin-2(1H)-one 4-amino-1-((2R,3R,5S)-2-(hydroxymethyl)-3-oxido-1,3-oxathiolan-5-yl)pyrimidin-2(1H)-one 160552-54-5 C8H11N3O4S
1-(4-Hydroxyphenyl)-7-oxo-6-[4-(2-oxopiperidin-1-yl)phenyl]-4,5,6,7-tetrahydro-1H-pyrazolo[3,4-c]pyridine-3-carboxamide 1-(4-Hydroxyphenyl)-7-oxo-6-[4-(2-oxopiperidin-1-yl)phenyl]-4,5,6,7-tetrahydro-1H-pyrazolo[3,4-c]pyridine-3-carboxamide 503612-76-8 C24H23N5O4
8-[(1R)-1-Hydroxy-2-[[2-(4-methoxyphenyl)-1,1-dimethylethyl]amino]ethyl]-6-(phenylmethoxy)-2H-1,4-benzoxazin-3(4H)-one 8-[(1R)-1-Hydroxy-2-[[2-(4-methoxyphenyl)-1,1-dimethylethyl]amino]ethyl]-6-(phenylmethoxy)-2H-1,4-benzoxazin-3(4H)-one 869478-13-7 C28H32N2O5
1-(2-(methylamino)ethyl)piperidin-4-yl [1,1'-biphenyl]-2-ylcarbamate 1-(2-(methylamino)ethyl)piperidin-4-yl [1,1'-biphenyl]-2-ylcarbamate 743460-48-2 C21H27N3O2
Cefuroxime Sodium impurity D Cefuroxime Sodium impurity D C16H16N4NaO8S
Silodosin impurity A Silodosin impurity A
cefditoren △-3 isomer cefditoren △-3 isomer
Ixazomib Impurity 1 Ixazomib Impurity 1 1201903-02-7 C24H33BCl2N2O4
Ofloxacin/Levofloxacin Impurity E Ofloxacin/Levofloxacin Impurity E
(3S)-9,10-difluoro-3-methyl-7-oxo-2,3,6,7-tetrahydro-5H-[1,4]oxazino[2,3,4-ij]quinoline-6-carboxylic acid (3S)-9,10-difluoro-3-methyl-7-oxo-2,3,6,7-tetrahydro-5H-[1,4]oxazino[2,3,4-ij]quinoline-6-carboxylic acid 1026952-91-9 C13H11F2NO4
((4-Methoxyphenoxy)methylene)dibenzene ((4-Methoxyphenoxy)methylene)dibenzene 85686-16-4 C20H18O2
Tofacitinib Impurity L Tofacitinib Impurity L
1-chloro-3-(dimethoxymethyl)benzene 1-chloro-3-(dimethoxymethyl)benzene 3395-80-0 C9H11ClO2
N-(3-bromo-4-oxocyclohexyl)acetamide N-(3-bromo-4-oxocyclohexyl)acetamide 687639-03-8 C8H12BrNO2
methyl (Z)-3-(hydroxy(phenyl)methylene)-2-oxoindoline-6-carboxylate methyl (Z)-3-(hydroxy(phenyl)methylene)-2-oxoindoline-6-carboxylate C44H51N9O4
Alvimopan Impurity 5 Alvimopan Impurity 5
Palbociclib-d8 Palbociclib-d8 1628752-83-9 C24H21D8N7O2
Ivabradine Impurity 15 Ivabradine Impurity 15 1132667-04-9 C12H17NO2
Sofosbuvir Impurity27 Sofosbuvir Impurity27
Isavuconazole Impurity 12 Isavuconazole Impurity 12
Tacrolimus Impurity 3 Tacrolimus Impurity 3 161861-10-5 C45H71NO13
Aprepitant EP Impurity C Aprepitant EP Impurity C 2208275-99-2 C29H25F7N4O3
[R-(R*,S*)]-(-)-N-(1-PHENYLETHYL)-1-AZABICYCLO[2.2.2]OCTAN-3-AMINE DIHYDROCHLORIDE [R-(R*,S*)]-(-)-N-(1-PHENYLETHYL)-1-AZABICYCLO[2.2.2]OCTAN-3-AMINE DIHYDROCHLORIDE 128311-06-8 C15H24Cl2N2
GURKHSYORGJETM-MGDILKBHSA-N GURKHSYORGJETM-MGDILKBHSA-N 1992961-26-8 C33H39ClN4O6
DVCUGHHGLKCBMT-QVDQXJPCSA-N DVCUGHHGLKCBMT-QVDQXJPCSA-N 1356353-76-8 C15H24N6O6
5,6-Dehydro-Tigecycline 5,6-Dehydro-Tigecycline 1633815-62-9 C29H37N5O8
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