Pharmaceutical Impurity Reference Standards

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Structure Chemical Name CAS MF
Bisoprolol EP IMpurity B HeMifuMarate (Bisoprolol n-Propyl Derivative HeMifuMarate) Bisoprolol EP IMpurity B HeMifuMarate (Bisoprolol n-Propyl Derivative HeMifuMarate) 1447715-44-7 C18H31NO4
Dabigatran iMpurity F Dabigatran iMpurity F 1642853-67-5 C19H20N4O4
Decitabine iMpurity 4 Decitabine iMpurity 4 863396-35-4 C6H12O4
Gliclazide iMpurity D Gliclazide iMpurity D 1136426-19-1 C15H20N2O3S
Losartan IMpurity C (Isolosartan) Losartan IMpurity C (Isolosartan) 114799-13-2 C22H23ClN6O
Posaconazole DiastereoisoMer interMediate 2 Posaconazole DiastereoisoMer interMediate 2 166583-12-6 C21H21F2N3O4S
Quetiapine IMpurity P (11-(4-Ethylpiperazin-1-yl)dibenzo[b,f][1,4]thiazepine fuMarate)) Quetiapine IMpurity P (11-(4-Ethylpiperazin-1-yl)dibenzo[b,f][1,4]thiazepine fuMarate)) 1011758-03-4 C19H21N3S
TaMsulosin IMpurity B TaMsulosin IMpurity B C20H28N2O5S
Ticagrelor iMpurity N Ticagrelor iMpurity N
Tirofiban IMpurity (4,4'-Dipyridyl-1,5-Pentane) Tirofiban IMpurity (4,4'-Dipyridyl-1,5-Pentane) 25382-33-6 C15H18N2
3-Quinolinecarbonitrile,4-chloro-6-Methoxy-7-[3-(4-Methyl-1-piperazinyl)propoxy]- 3-Quinolinecarbonitrile,4-chloro-6-Methoxy-7-[3-(4-Methyl-1-piperazinyl)propoxy]- 492444-39-0 C19H23ClN4O2
Vardenafil Oxopiperazine (IMpurity) Vardenafil Oxopiperazine (IMpurity) 448184-58-5 C21H26N6O5S
IverMectin B1 Aglycon IverMectin B1 Aglycon 73162-95-5 C34H50O8
9α-BroMobudesonide 9α-BroMobudesonide 313474-59-8 C25H33BrO6
N-(5-Chloro-2-pyridinyl)-2-pyrazinecarboxaMide (Zopiclone IMpurity) N-(5-Chloro-2-pyridinyl)-2-pyrazinecarboxaMide (Zopiclone IMpurity) 349125-10-6 C10H7ClN4O
2-Methyl SiMvastatin (Mixture Of DiasteroisoMers) 2-Methyl SiMvastatin (Mixture Of DiasteroisoMers) 774611-54-0 C26H40O5
(4-Chloro-3,5-diMethylpyridin-2-yl)Methanol Hydrochloride (4-Chloro-3,5-diMethylpyridin-2-yl)Methanol Hydrochloride 143016-70-0 C8H11Cl2NO
AMoxicillin DiMer (penicilloic acid forM) AMoxicillin DiMer (penicilloic acid forM) 210289-72-8 C32H40N6O11S2
Desacetyl-7-ACA Lactone Desacetyl-7-ACA Lactone 184696-69-3 C8H8N2O3S
5,6-DiMethoxy-2-[(4-piperidyl)Methyl]indane Hydrochloride (Donepezil IMpurity) 5,6-DiMethoxy-2-[(4-piperidyl)Methyl]indane Hydrochloride (Donepezil IMpurity) 1034439-43-4 C17H26ClNO2
CarfilzoMib IMpurity CarfilzoMib IMpurity 1541171-65-6 C41H61N5O10S
Atracurium Impurity R Atracurium Impurity R
Fludarabine EP impurity K Fludarabine EP impurity K
Ropivacaine Impurity 28 Ropivacaine Impurity 28
Ropivacaine Impurity 6 Ropivacaine Impurity 6
Solifenacin ring opening Impurity 11 Solifenacin ring opening Impurity 11
Sugammadex sodium Org210839-1 Impurity Sugammadex sodium Org210839-1 Impurity
Sugammadex sodium Org284426-1 Impurity Sugammadex sodium Org284426-1 Impurity
Bendamustine Related Impurity 6 Bendamustine Related Impurity 6
Butyphthalide impurity 39 Butyphthalide impurity 39 1841089-57-3 C24H28O4
Butyphthalide impurity 45 Butyphthalide impurity 45
Dapoxetine impurity 18 Dapoxetine impurity 18
Febuxostat Impurity 76 Febuxostat Impurity 76
Febuxostat Impurity 91 Febuxostat Impurity 91
Ipratropium Bromide Impurity 1 Ipratropium Bromide Impurity 1 C20H29Br2NO3
Lenvatinib Impurity 18 Lenvatinib Impurity 18
Moxifloxacin Impurity 44 Moxifloxacin Impurity 44 1048972-52-6 C14H12FNO5
Nintedanib Impurity 32 Nintedanib Impurity 32
Olsalazine Impurity C Olsalazine Impurity C
Parecoxib sodium Impurity 33 Parecoxib sodium Impurity 33
Tofacitinib Impurity 96 Tofacitinib Impurity 96
Vildagliptin Impurity ZA5 Vildagliptin Impurity ZA5
Linagliptin Impurity CD10925 Linagliptin Impurity CD10925
Nintedanib Impurity N Nintedanib Impurity N
(2R,3R,4R,5S,6S)-2-(acetoxymethyl)-6-(4-chloro-3-(4- hydroxybenzyl)phenyl)tetrahydro-2H-pyran-3,4,5-triyl triacetate (2R,3R,4R,5S,6S)-2-(acetoxymethyl)-6-(4-chloro-3-(4- hydroxybenzyl)phenyl)tetrahydro-2H-pyran-3,4,5-triyl triacetate 1079083-63-8 C27H29ClO10
Vildagliptin Impurity 25 Vildagliptin Impurity 25 1563006-28-9 C7H10N2O2
(2R,3R,4R,5S,6S)-2-(acetoxymethyl)-6-(4-chloro-3- (4-methoxybenzyl)phenyl)tetrahydro-2H-pyran-3,4,5-triyl triacetate (2R,3R,4R,5S,6S)-2-(acetoxymethyl)-6-(4-chloro-3- (4-methoxybenzyl)phenyl)tetrahydro-2H-pyran-3,4,5-triyl triacetate 872980-38-6 C28H31ClO10
Vinorelbine Impurity DX Vinorelbine Impurity DX 89368-94-5 C46H55BrN4O8
1-hydroxypropan-2-yl 2-(2-(4-((4-chlorophenyl)(phenyl)
methyl)piperazin-1-yl)ethoxy)acetate compound with 2-
hydroxypropyl 2-(2-(4-((4-chlorophenyl)(phenyl)methyl)
piperazin-1-yl)ethoxy)acetate (1:1) hydrochloride 1-hydroxypropan-2-yl 2-(2-(4-((4-chlorophenyl)(phenyl) methyl)piperazin-1-yl)ethoxy)acetate compound with 2- hydroxypropyl 2-(2-(4-((4-chlorophenyl)(phenyl)methyl) piperazin-1-yl)ethoxy)acetate (1:1) hydrochloride
Eltrombopag Impurity 2 Eltrombopag Impurity 2
Dapoxetine Impurity 17 Dapoxetine Impurity 17
Avibactam Impurity Avibactam Impurity 2064219-26-5 C7H12N3NaO6S
(1s,4s)-4-((2-aminobenzyl)amino)cyclohexan-1-ol hydrochloride (1s,4s)-4-((2-aminobenzyl)amino)cyclohexan-1-ol hydrochloride C13H21ClN2O
Solifenacin impurity 23 Solifenacin impurity 23
Edaravone impurity DEE Edaravone impurity DEE
Linagliptin Impurity 49 Linagliptin Impurity 49
(1r,4r)-4-(7,9-dibromo-2,3-dihydro-1H-benzo[e][1,4]diazepin-4(5H)-yl)cyclohexanol hydrochloride (1r,4r)-4-(7,9-dibromo-2,3-dihydro-1H-benzo[e][1,4]diazepin-4(5H)-yl)cyclohexanol hydrochloride 2376577-10-3 C15H21Br2ClN2O
Procatero Impurity Procatero Impurity 90098-93-4 C11H9NO3
4-((2-amino-3,5-dibromobenzyl)amino)cyclohexanone hydrochloride 4-((2-amino-3,5-dibromobenzyl)amino)cyclohexanone hydrochloride C13H17Br2ClN2O
Pazufloxacin Impurity 5 Pazufloxacin Impurity 5 777824-29-0 C15H15FN2O2
Vonoprazan Impurity Z-4 Vonoprazan Impurity Z-4
Olanzapine impurity O Olanzapine impurity O C17H20N4S
Cabozantinib impurity 26 Cabozantinib impurity 26 2840522-80-5 C28H25ClFN3O5
Afatinib impurity 45 Afatinib impurity 45 99281-87-5 C5H9NO2
Dapoxetine impurity 24 Dapoxetine impurity 24 1445281-20-8 C20H20O4S
Tazobactam Impurity E Tazobactam Impurity E
Vildagliptin Impurity 42 Vildagliptin Impurity 42
Canagliflozin Impurity 45 Canagliflozin Impurity 45
Pralatrexate Impurity 5 Pralatrexate Impurity 5
Pitavastatin Impurity 61 Pitavastatin Impurity 61
Sitafloxacin Impurity 17 Sitafloxacin Impurity 17
Cilastatin Isomer Impurity Cilastatin Isomer Impurity
Prednicarbate Impurity E Prednicarbate Impurity E
Olprinone Impurity B Olprinone Impurity B
Atracurium Impurity 28 Atracurium Impurity 28
Canagliflozin Impurity 51 Canagliflozin Impurity 51
Canagliflozin Impurity 67 Canagliflozin Impurity 67
Cefazolin Impurity Q Cefazolin Impurity Q
Acyclovir Impurity 13 Acyclovir Impurity 13
Afatinib impurity 48 Afatinib impurity 48
Cabozantinib impurity M Cabozantinib impurity M
Rotigotine Impurity 8 Rotigotine Impurity 8
Palbociclib-025 Palbociclib-025 2174002-16-3 C25H29N7O3
Nitrendipine iMpurity 3 Nitrendipine iMpurity 3
Cefminox Impurity 3 Cefminox Impurity 3
Afatinib Impurity 57 Afatinib Impurity 57
Apremilast Impurity 34 Apremilast Impurity 34 2469037-82-7 C20H20N2O7S
Aprepitant Impurity 35 Aprepitant Impurity 35
Bosutinib Impurity 15 Bosutinib Impurity 15
Ertapenem Impurity 2 Ertapenem Impurity 2
Febuxostat Impurity 68 Febuxostat Impurity 68
Indacaterol Impurity 9 Indacaterol Impurity 9
Olanzapine Impurity 22 Olanzapine Impurity 22 C17H20N4S
Olopatadine Impurity 9 Olopatadine Impurity 9 680579-52-6 C39H36Br2P2
Oseltamivir Impurity 59 Oseltamivir Impurity 59
Palbociclib Impurity 36 Palbociclib Impurity 36
Regorafenib Impurity 34 Regorafenib Impurity 34
Rosuvastatin Impurity 47 Rosuvastatin Impurity 47
Sildenafil Impurity 36 Sildenafil Impurity 36 C25H27N3O5
Sunitinib Impurity 4 Sunitinib Impurity 4
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