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Pharmaceutical Impurity Reference Standards

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Structure Chemical Name CAS MF
(S)-3-(3-((3-chloro-2-(3,4-dimethoxyphenyl)propyl)(methyl)amino) propyl)-7,8-dimethoxy-1,3,4,5-tetrahydro-2H-benzo[d]azepin-2-one hydrochloride (S)-3-(3-((3-chloro-2-(3,4-dimethoxyphenyl)propyl)(methyl)amino) propyl)-7,8-dimethoxy-1,3,4,5-tetrahydro-2H-benzo[d]azepin-2-one hydrochloride
(2R,3R)-3-amino-2-methyl-4-oxoazetidine-1-sulfonic acid (2R,3R)-3-amino-2-methyl-4-oxoazetidine-1-sulfonic acid
Osimertinib impurity01 Osimertinib impurity01
(±)-N-[3-acetyl-4-[2-hydroxy-3-[(1-methylethyl)amino]propoxy]phenyl]acetamide monohydrochloride (±)-N-[3-acetyl-4-[2-hydroxy-3-[(1-methylethyl)amino]propoxy]phenyl]acetamide monohydrochloride 73899-76-0 C16H25ClN2O4
Hexanoic acid, 6-chloro-3,5-dihydroxy-, (3R,5S)- Hexanoic acid, 6-chloro-3,5-dihydroxy-, (3R,5S)- 958358-67-3 C6H11ClO4
Oseltamivir Impurity 78 Oseltamivir Impurity 78
Oseltamivir Impurity 67 Oseltamivir Impurity 67
Ixazomib Impurity ABCDEFGHJKL Ixazomib Impurity ABCDEFGHJKL
2-[[[4-(2,2-dimethyl-1-oxopropoxy)phenyl]sulfonyl]amino]-Benzoic acid 2-[[[4-(2,2-dimethyl-1-oxopropoxy)phenyl]sulfonyl]amino]-Benzoic acid 188114-98-9 C18H19NO6S
2-chloromethyl-4-(3-hydroxypropoxy)-3-methylpyridine 2-chloromethyl-4-(3-hydroxypropoxy)-3-methylpyridine 117976-92-8 C10H14ClNO2
8-Methoxy Entecavir 8-Methoxy Entecavir 2203740-23-0 C13H17N5O4
Bortezomib Impurity 32 Bortezomib Impurity 32 1310383-72-2 C17H31BF3NO5
Topiroxostat Impurity 14 Topiroxostat Impurity 14
1-Pyrrolidinecarboxylic acid, 4-hydroxy-2-(3-thiazolidinylcarbonyl)-, 1,1-dimethylethyl ester, (2S,4S)- 1-Pyrrolidinecarboxylic acid, 4-hydroxy-2-(3-thiazolidinylcarbonyl)-, 1,1-dimethylethyl ester, (2S,4S)- 401564-34-9 C13H22N2O4S
Ampicillin Impurity B Ampicillin Impurity B
Clindamycin Phosphate EP Impurity K Clindamycin Phosphate EP Impurity K
7,7'-(butane-1,4-diylbis(oxy))bis(quinolin-2(1H)-one) 7,7'-(butane-1,4-diylbis(oxy))bis(quinolin-2(1H)-one) 2116542-19-7 C22H20N2O4
Descyclopropyl Lenvatinib Descyclopropyl Lenvatinib 417719-51-8 C18H15ClN4O4
4'-Hydroxy TorseMide 4'-Hydroxy TorseMide 99300-67-1 C16H20N4O4S
Hydroxyzine Acetic Acid Dihydrochloride Hydroxyzine Acetic Acid Dihydrochloride 83881-56-5 C23H29ClN2O4
(S)-Duloxetine SuccinaMide (S)-Duloxetine SuccinaMide 199191-66-7 C22H23NO4S
4-Acetyl Rhein 4-Acetyl Rhein 875535-36-7 C17H10O7
1-(2,6-dichlorophenyl)piperazine 1-(2,6-dichlorophenyl)piperazine 63386-61-8 C10H12Cl2N2
1-(2,6-dichlorophenyl)piperazine 1-(2,6-dichlorophenyl)piperazine 63386-61-8 C10H12Cl2N2
Ropivacaine N-Oxide Ropivacaine N-Oxide 1391053-59-0 C17H26N2O2
Ticagrelor IMpurity L (Mixture of DiastereoMers) Ticagrelor IMpurity L (Mixture of DiastereoMers)
α-Hydroxy-α-3-thienyl-2-thiopheneacetic Acid 9-Methyl-3-oxa-9-azatricyclo[3.3.1.02,4]non-7-yl Ester α-Hydroxy-α-3-thienyl-2-thiopheneacetic Acid 9-Methyl-3-oxa-9-azatricyclo[3.3.1.02,4]non-7-yl Ester 783273-13-2 C18H19NO4S2
3H-4,7a-Methanocyclohept[3,3a]indeno[5,4-b]oxete Benzenepropanoic Acid Derivative 3H-4,7a-Methanocyclohept[3,3a]indeno[5,4-b]oxete Benzenepropanoic Acid Derivative 146139-03-9 C47H51NO14
Fluvastatin 3-Hydroxy-4,6-diene Fluvastatin 3-Hydroxy-4,6-diene 1207963-21-0 C24H24FNO3
Cyclosporine iMpurity Cyclosporine iMpurity
ThiaMine IMpurity ThiaMine IMpurity C12H17ClN4OS
CitalopraM IMpurity CitalopraM IMpurity
Bupivacaine Impurity Bupivacaine Impurity 780736-98-3 C14H20N2O
rel-(4aR,7aR)-6-Benzyloctahydro-1H-pyrrolo[3,4-b]pyridine rel-(4aR,7aR)-6-Benzyloctahydro-1H-pyrrolo[3,4-b]pyridine 161594-54-3 C14H20N2
1,2-bis(4-(3-(trifluoromethyl)phenyl)piperazin-1-yl)ethane 1,2-bis(4-(3-(trifluoromethyl)phenyl)piperazin-1-yl)ethane 51299-16-2 C24H28F6N4
(R)-N-(1-(7,8-dihydronaphthalen-1-yl)ethyl)-3-(3-(trifluoromethyl)phenyl)propan-1-amine (R)-N-(1-(7,8-dihydronaphthalen-1-yl)ethyl)-3-(3-(trifluoromethyl)phenyl)propan-1-amine 802918-35-0 C22H24F3N
Demiditraz racemate Demiditraz racemate 944263-08-5 C13H16N2
Ropivacaine-iPr Ropivacaine-iPr 175888-75-2 C17H26N2O
Demiditraz IMpurity Demiditraz IMpurity 944267-48-5 C19H18N2O
Apremilast impurity 18 Apremilast impurity 18 1407140-51-5 C20H32N2O6S
Betamethasone EP Impurity F Betamethasone EP Impurity F 330157-04-5 C22H28O4
Capecitabine Impurity 8 Capecitabine Impurity 8
Carfilzomib Impurity D Carfilzomib Impurity D
3-Piperidinemethanol, 4-(4-fluorophenyl)-1-methyl-, (3R,4R)-rel- 3-Piperidinemethanol, 4-(4-fluorophenyl)-1-methyl-, (3R,4R)-rel- 54088-21-0 C13H18FNO
1'-Hydroxy Bilastine 1'-Hydroxy Bilastine 1638785-23-5 C28H37N3O4
Brexpiprazole Impurity 4 Brexpiprazole Impurity 4 2116542-20-0 C25H27N3O2S
Fosaprepitant Impurity 5 Fosaprepitant Impurity 5 327623-35-8 C21H19F6NO3
Moxifloxacin Ethyl Ester Moxifloxacin Ethyl Ester 1403836-23-6 C23H28FN3O4
Pantoprazole Impurity 5 Pantoprazole Impurity 5 1806469-15-7 C8H6F2N2O2
Venlafaxine Impurity 5 Venlafaxine Impurity 5 1346600-77-8 C17H27NO2
N-(4-methyl-3-(4-methyl-6-(pyridin-3-yl)pyrimidin-2-ylamino)phenyl)-4-((4-methylpiperazin-1-yl)methyl)benzamide N-(4-methyl-3-(4-methyl-6-(pyridin-3-yl)pyrimidin-2-ylamino)phenyl)-4-((4-methylpiperazin-1-yl)methyl)benzamide C30H33N7O
Exemestane impurity B -F Exemestane impurity B -F 184972-09-6 C20H26O3
Fesoterodine Impurity 8 Fesoterodine Impurity 8 1380491-71-3 C48H66N2O4
QBWNUEJPRUVNTD-FOIQADDNSA-N QBWNUEJPRUVNTD-FOIQADDNSA-N 1346602-17-2 C22H17N3O5
Cefodizime Impurity 4 Cefodizime Impurity 4
Cefradine impurity 5 Cefradine impurity 5 1379292-16-6 C10H17NO2
Clopidogrel Impurity 13 Clopidogrel Impurity 13 2173294-69-2 C16H16ClNO5S2
DecitaBine Impurity 12 DecitaBine Impurity 12
Erlotinib Impurity 28 Erlotinib Impurity 28
Fosaprepitant Impurity 12 Fosaprepitant Impurity 12 172673-19-7 C23H22F7N4O6P
Ibuprofen Impurity 2 Ibuprofen Impurity 2 C13H18O2
Imatinib Impurity 9 Imatinib Impurity 9
Isavuconazole Impurity 22 Isavuconazole Impurity 22
Isavuconazole Impurity 28 Isavuconazole Impurity 28
Levothyroxine Impurity 16 Levothyroxine Impurity 16 909279-46-5 C15H11ClI3NO4
Linagliptin Impurity 42 Linagliptin Impurity 42
PalBociclib Impurity 25 PalBociclib Impurity 25
Posaconazole Impurity 13 Posaconazole Impurity 13 357189-98-1 C37H40F2N8O6
Posaconazole Impurity 25 Posaconazole Impurity 25 1042398-26-4 C16H19F2IO3
Posaconazole Impurity 42 Posaconazole Impurity 42 357189-96-9 C36H40F2N8O5
Posaconazole Impurity 65 Posaconazole Impurity 65 2947625-11-6
Pramipexole Dimer Impurity (Mixture of Diastereomers) Pramipexole Dimer Impurity (Mixture of Diastereomers) 1147937-31-2 C13H23N3S
Sitafloxacin Impurity 1 Sitafloxacin Impurity 1
Sitagliptin Impurity 25 Sitagliptin Impurity 25
sofosBuvir impurity 47 sofosBuvir impurity 47
SofosBuvir Impurity 64 SofosBuvir Impurity 64
Tofacitinib Impurity W Tofacitinib Impurity W
Trelagliptin Impurity 21 Trelagliptin Impurity 21
Kaempferol-3-rhamnoglucoside-7-glucoside Kaempferol-3-rhamnoglucoside-7-glucoside 34336-18-0 C33H40O20
Mupirocin iMpurity 2 Mupirocin iMpurity 2 C26H44O9
Cytarabine Impurity 10 Cytarabine Impurity 10 32830-01-6 C9H11N3O4
Ceftriaxone Sodium impurity 5 Ceftriaxone Sodium impurity 5
Sugammadex sodium Org48302 Impurity Sugammadex sodium Org48302 Impurity
176761-00-5 176761-00-5 176761-00-5 C17H15FN2O5
Pramipexole Impurity W Pramipexole Impurity W
Aprepitant Impurity 44 Aprepitant Impurity 44 172676-88-9 C23H21F7N4O3
Oseltamivir Impurity 26 Oseltamivir Impurity 26 241465-24-7
Afatinib Impurity I Afatinib Impurity I
Moxifloxacin Impurity 5 Moxifloxacin Impurity 5
Moxifloxacin Impurity 24 Moxifloxacin Impurity 24
Fosaprepitant Impurity 1 Fosaprepitant Impurity 1
Ticagrelor Impurity 1 Ticagrelor Impurity 1
Ezetimibe Impurity 36 Ezetimibe Impurity 36
Pitavastatin Impurity 2 Pitavastatin Impurity 2
Fudosteine Impurity 2 Fudosteine Impurity 2
Sugammadex Impurity 18 Sugammadex Impurity 18
Mirabegron Impurity 21 Mirabegron Impurity 21
Apixaban Impurity 18 Apixaban Impurity 18 473927-65-0 C20H17IN4O3
Clopidogrel Impurity 12 Clopidogrel Impurity 12 C15H14ClNO2S
Oseltamivir Impurity 25 Oseltamivir Impurity 25
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