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Pharmaceutical Impurity Reference Standards

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Structure Chemical Name CAS MF
Atorvastatin pyrrolidone lactone Atorvastatin pyrrolidone lactone 906552-19-0 C33H33FN2O5
Cabozantinib Impurity G Cabozantinib Impurity G
Clopidogrel Impurity 10 Clopidogrel Impurity 10 C15H14ClNO2S
Dapoxetine Impurity 4 HCl Dapoxetine Impurity 4 HCl 119357-39-0 C21H23NO
Medetomidine Impurity 2 Medetomidine Impurity 2 33967-19-0 C10H14O
Tofacitinib Impurity 34 Tofacitinib Impurity 34 2459302-86-2 C19H22N8
1,2-Ethanediamine, N,N,N',N'-tetrakis(2-aminoethyl)- 1,2-Ethanediamine, N,N,N',N'-tetrakis(2-aminoethyl)- 4097-90-9 C10H28N6
Omeprazole EP Impurity G Omeprazole EP Impurity G 125656-83-9 C16H13N3O2S
Piperazine, 1-methyl-4-[(4-methyl-1-piperazinyl)carbonyl]- Piperazine, 1-methyl-4-[(4-methyl-1-piperazinyl)carbonyl]- 4180-30-7 C11H22N4O
Cefdinan impurity S Cefdinan impurity S
(4S)-2-(((R)-2-Amino-2-phenylacetamido)(carboxy)-methyl)-5,5-dimethylthiazolidine-4-carboxylic (4S)-2-(((R)-2-Amino-2-phenylacetamido)(carboxy)-methyl)-5,5-dimethylthiazolidine-4-carboxylic 1642629-93-3 C16H21N3O5S
3,3'-(ethane-1,2-diyl)bis(1-(2-chloroethyl)-1H-benzo[d]imidazol-2(3H)-one) 3,3'-(ethane-1,2-diyl)bis(1-(2-chloroethyl)-1H-benzo[d]imidazol-2(3H)-one) 191977-79-4 C20H20Cl2N4O2
octakis(6-chloro-6-deoxy)-γ-cyclodextrin octakis(6-chloro-6-deoxy)-γ-cyclodextrin 173094-60-5 C48H72Cl8O32
N-[4-(difluoromethoxy)-2-nitrophenyl]acetamide N-[4-(difluoromethoxy)-2-nitrophenyl]acetamide 97963-75-2 C9H8F2N2O4
Ropivacaine-ET Ropivacaine-ET 2180-94-1 C16H24N2O
Pitavastatin Dihydrobenzophenanthridine Pitavastatin Dihydrobenzophenanthridine 1187966-91-1 C25H24FNO4
BDJS-SH 3 BDJS-SH 3 1817657-89-8 C12H18N2O2
Aprepitant Impurity 19 Aprepitant Impurity 19 1333995-14-4
Blonanserin impurity E Blonanserin impurity E
Clindamycin Impurity 17 Clindamycin Impurity 17
Edaravone Impurity 12 Edaravone Impurity 12 2061958-41-4 C12H16N2O2
Empagliflozin Impurity 19 Empagliflozin Impurity 19
Erythromycin impurity D Erythromycin impurity D
FeBuxostat Impurity 40 FeBuxostat Impurity 40
Formoterol Impurity 13 Formoterol Impurity 13 150513-24-9 C18H24N2O3
Fosaprepitant Impurity 4 Fosaprepitant Impurity 4 1523569-85-8 C37H34F7N4O6P
Fudosteine Impurity 2 Fudosteine Impurity 2 1480319-53-6 C6H13NO5S
Ilaprazole Impurity 1 Ilaprazole Impurity 1
Ilaprazole Impurity 2 Ilaprazole Impurity 2
Isavuconazole Impurity 10 Isavuconazole Impurity 10
Isavuconazole Impurity 18 Isavuconazole Impurity 18
Isavuconazole Impurity 6 Isavuconazole Impurity 6
Lercanidipine Impurity 4 Lercanidipine Impurity 4 2727061-30-3 C18H23NO2
Nitrendipine Impurity 4 Nitrendipine Impurity 4
Olaparib Impurity 6 Olaparib Impurity 6
Paclitaxel EP Impurity H Paclitaxel EP Impurity H
Paroxetine Impurity 10 Paroxetine Impurity 10
Posaconazole Impurity 31 Posaconazole Impurity 31
Posaconazole Impurity 60 Posaconazole Impurity 60 2134652-05-2 C14H14F2O4
Regorafenib impurity D Regorafenib impurity D
SofosBuvir impurity 21 SofosBuvir impurity 21 1496552-50-1 C22H29ClN3O9P
sofosBuvir impurity 36 sofosBuvir impurity 36
SofosBuvir Impurity 52 SofosBuvir Impurity 52
SofosBuvir Impurity 59 SofosBuvir Impurity 59
Ticagrelor impurity 25 Ticagrelor impurity 25
Tirofiban Impurity 14 Tirofiban Impurity 14 1103300-75-9 C12H17NO5S
Tirofiban Impurity 19 Tirofiban Impurity 19 158808-75-4 C18H28N2O3
Amoxicillin Impurity P Amoxicillin Impurity P C16H19N3O5S
Ampicillin Impurity S Ampicillin Impurity S
Cefdinir Impurity F (CP) Cefdinir Impurity F (CP)
Flucloxacillin Sodium Impurity A Flucloxacillin Sodium Impurity A 68728-50-7 C19H20ClFN3NaO6S
Oxacillin Sodium Impurity G(EP) Oxacillin Sodium Impurity G(EP) 724695-30-1 C19H18ClN3O5S
Spectinomycin Impurity D Spectinomycin Impurity D
(4R,4aS,5aR,12aS)-9-[2-(tert-butylamino)acetamido]-4,7-bis(dimethylamino)-3,10,12,12a-tetrahydroxy-1,11-dioxo-1,4,4a,5,5a,6,11,12a-octahydrotetracene-2-carboxamide (4R,4aS,5aR,12aS)-9-[2-(tert-butylamino)acetamido]-4,7-bis(dimethylamino)-3,10,12,12a-tetrahydroxy-1,11-dioxo-1,4,4a,5,5a,6,11,12a-octahydrotetracene-2-carboxamide C29H39N5O8
Amifostine Impurity 3 Amifostine Impurity 3 41510-53-6 C5H15N2O3PS
Cefradine impurity C Cefradine impurity C
Cefuroxime sodium impurity H Cefuroxime sodium impurity H C16H16N4NaO8S
Bilastine N-Oxide Bilastine N-Oxide 2069238-47-5 C28H37N3O4
Cefoxitin impurity F Cefoxitin impurity F
Tenofovir Disoproxil Fumarate impurity N Tenofovir Disoproxil Fumarate impurity N 1962114-92-6 C29H44N10O14P2
Prednisolone Impurity 7 Prednisolone Impurity 7 61549-70-0 C21H26O6
Tenofovir Related Compound 10 Tenofovir Related Compound 10 16958-60-4 C8H11N5O
N-(4-methyl-3-(N-(4-(pyridin-3-yl)pyrimidin-2-yl)acetamido)phenyl)-4-((4-methylpiperazin-1-yl)methyl)benzamide N-(4-methyl-3-(N-(4-(pyridin-3-yl)pyrimidin-2-yl)acetamido)phenyl)-4-((4-methylpiperazin-1-yl)methyl)benzamide C31H33N7O2
N1-benzyl-N1,4-dimethyl-N3-(4-(pyridin-3-yl)pyrimidin-2-yl)benzene-1,3-diamine N1-benzyl-N1,4-dimethyl-N3-(4-(pyridin-3-yl)pyrimidin-2-yl)benzene-1,3-diamine C24H23N5
(E)-4-(((5-(2-fluorophenyl)-1-(pyridin-3-ylsulfonyl)-1H-pyrrol-3- yl)methyl)(methyl)amino)-4-oxobut-2-enoic acid (E)-4-(((5-(2-fluorophenyl)-1-(pyridin-3-ylsulfonyl)-1H-pyrrol-3- yl)methyl)(methyl)amino)-4-oxobut-2-enoic acid C21H18FN3O5S
Apremilast Apremilast 1384439-80-8 C17H16N2O6S
TROXACITABINE TROXACITABINE 145511-98-4 C8H11N3O4
XXZJUZXKBFUPQH-IKGGRYGDSA-N XXZJUZXKBFUPQH-IKGGRYGDSA-N 1618657-31-0 C18H17FO4
6-methyl-2-oxo-5-pyridin-2-yl-1H-pyridine-3-carbonitrile 6-methyl-2-oxo-5-pyridin-2-yl-1H-pyridine-3-carbonitrile 106637-42-7 C12H9N3O
Levofloxacin Impurity 15 Levofloxacin Impurity 15 94714-58-6 C14H12F4O4
Losartan Impurity 2 Losartan Impurity 2 1407521-00-9 C22H20ClN3O
Epoxy Exemestane (6-Alfa Isomer) Epoxy Exemestane (6-Alfa Isomer) 152764-24-4 C20H24O3
6-Cyclopropyl-10-fluoro-7,8-dihydrobenzo[k]phenanthridine 6-Cyclopropyl-10-fluoro-7,8-dihydrobenzo[k]phenanthridine 1187966-94-4 C20H16FN
2-methoxy-1,7,9-trimethylpurine-6,8-dione 2-methoxy-1,7,9-trimethylpurine-6,8-dione 51168-26-4 C9H12N4O3
2-CHLORO-N-(2,5-DIMETHYLPHENYL)ACETAMIDE 2-CHLORO-N-(2,5-DIMETHYLPHENYL)ACETAMIDE 5177-35-5 C10H12ClNO
(R)-(+)-(3-CHLORO-2-HYDROXYPROPYL)TRIMETHYLAMMONIUM CHLORIDE (R)-(+)-(3-CHLORO-2-HYDROXYPROPYL)TRIMETHYLAMMONIUM CHLORIDE 117604-42-9 C6H15Cl2NO
REICHSTEIN'S SUBSTANCE S 21-ACETATE REICHSTEIN'S SUBSTANCE S 21-ACETATE 640-87-9 C23H32O5
N,N'-(OXYDI-4,1-PHENYLENE)BISACETAMIDE N,N'-(OXYDI-4,1-PHENYLENE)BISACETAMIDE 3070-86-8 C16H16N2O3
3-(2-hydroxyethyl) 5-methyl 2,6-dimethyl-4-(3-nitrophenyl)-1,4-dihydropyridine-3,5-dicarboxylate 3-(2-hydroxyethyl) 5-methyl 2,6-dimethyl-4-(3-nitrophenyl)-1,4-dihydropyridine-3,5-dicarboxylate 85677-95-8 C18H20N2O7
3-isobutylisobenzofuran-1(3H)-one 3-isobutylisobenzofuran-1(3H)-one 199736-94-2 C12H14O2
isopropyl(4,6-diamino-2-(1-(2-fluorobenzyl)-1H-pyrazolo[3,4-b] pyridin-3-yl)pyrimidin-5-yl)(methyl)carbamate isopropyl(4,6-diamino-2-(1-(2-fluorobenzyl)-1H-pyrazolo[3,4-b] pyridin-3-yl)pyrimidin-5-yl)(methyl)carbamate 625115-54-0 C22H23FN8O2
Malvidin 3-O-glucoside Malvidin 3-O-glucoside 18470-06-9 C23H25O12+
(S)-Olodaterol (S)-Olodaterol 868049-50-7 C21H26N2O5
5,6-DIHYDRO-3-METHYLAMINO-2H-1,4-THIAZIN-2-ONE OXIME 5,6-DIHYDRO-3-METHYLAMINO-2H-1,4-THIAZIN-2-ONE OXIME 148639-72-9 C5H9N3OS
M-ISOBUTYL IBUPROFEN M-ISOBUTYL IBUPROFEN 66622-47-7 C13H18O2
1,3-BIS(METHYLTHIO)-2-PROPANOL 1,3-BIS(METHYLTHIO)-2-PROPANOL 31805-83-1 C5H12OS2
4-ISOTHIOCYANATO-4'-NITRODIPHENYL ETHER 4-ISOTHIOCYANATO-4'-NITRODIPHENYL ETHER 19881-18-6 C13H8N2O3S
(R)-N-Glycidylphthalimide (R)-N-Glycidylphthalimide 181140-34-1 C11H9NO3
6-chloro-N-((1R,2S)-2-(3,4-difluorophenyl)cyclopropyl)-5- nitro-2-(propylthio)pyrimidin-4-amine 6-chloro-N-((1R,2S)-2-(3,4-difluorophenyl)cyclopropyl)-5- nitro-2-(propylthio)pyrimidin-4-amine 1427523-93-0 C16H15ClF2N4O2S
Bendamustine Impurity 15 Bendamustine Impurity 15
Bendamustine Related Impurity 10 Bendamustine Related Impurity 10
Bortezomib Impurity 16 Bortezomib Impurity 16
Captopril Related Compound 8 Captopril Related Compound 8 112243-88-6 C9H15NO3S
Edoxaban Impurity 25 (1R,2S,4R) Oxalate Edoxaban Impurity 25 (1R,2S,4R) Oxalate
Ezetimibe Impurity 35 Ezetimibe Impurity 35 1650568-82-3 C39H46F2N2O5Si2
Fosaprepitant Impurity 8 Fosaprepitant Impurity 8
Linagliptin Impurity 28 Linagliptin Impurity 28 2074688-84-7 C22H23N7O3
Pantoprazole Impurity 3 Pantoprazole Impurity 3
Ticagrelor Related Compound 58 Ticagrelor Related Compound 58
Vildagliptin Impurity 9 Vildagliptin Impurity 9
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