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Pharmaceutical Impurity Reference Standards

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Structure Chemical Name CAS MF
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
22,23-Didehydro SelaMectin 22,23-Didehydro SelaMectin 165108-09-8 C43H61NO11
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
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
S,S-Efinaconazole S,S-Efinaconazole 164650-45-7 C18H22F2N4O
BendaMustine IMpurity BendaMustine IMpurity
Acetic acid, 2-chloro-2-[2-(2-Methoxyphenyl)hydrazinylidene]-, ethyl ester Acetic acid, 2-chloro-2-[2-(2-Methoxyphenyl)hydrazinylidene]-, ethyl ester 85014-68-2 C11H13ClN2O3
D-Alanine, N-[[P(S),2'R]-2'-cyano-2'-deoxy-2'-Methyl-P-phenyl-5'-cytidylyl]-, 1-Methylethyl ester D-Alanine, N-[[P(S),2'R]-2'-cyano-2'-deoxy-2'-Methyl-P-phenyl-5'-cytidylyl]-, 1-Methylethyl ester 1496552-28-3 C22H29FN3O9P
D-Glucitol, 1,5-anhydro-1-C-[4-Methyl-3-[(5-phenyl-2-thienyl)Methyl]phenyl]-, (1S)- D-Glucitol, 1,5-anhydro-1-C-[4-Methyl-3-[(5-phenyl-2-thienyl)Methyl]phenyl]-, (1S)- 842133-16-8 C24H26O5S
Phthalic acid, 3,3'-azoxydi- (8CI) Phthalic acid, 3,3'-azoxydi- (8CI) 22895-28-9 C16H10N2O9
(alphaE)-alpha-[(3,4-Dihydroxy-5-nitrophenyl)methylene]-beta-oxo-1-piperidinepropanenitrile (alphaE)-alpha-[(3,4-Dihydroxy-5-nitrophenyl)methylene]-beta-oxo-1-piperidinepropanenitrile 1150310-15-8 C15H15N3O5
(2E)-2-Cyano-3-(3-ethoxy-4-hydroxy-5-nitrophenyl)-N,N-diethyl-2-propenamide (2E)-2-Cyano-3-(3-ethoxy-4-hydroxy-5-nitrophenyl)-N,N-diethyl-2-propenamide 857629-79-9 C16H19N3O5
(R,E)-ethyl 5-([1,1'-biphenyl]-4-yl)-4-((tert-butoxycarbonyl)aMino)-2-Methylpent-2-enoate (R,E)-ethyl 5-([1,1'-biphenyl]-4-yl)-4-((tert-butoxycarbonyl)aMino)-2-Methylpent-2-enoate 149709-59-1 C25H31NO4
1-(3-AMinopropyl)-4-(2-Methoxyphenyl)piperazine 97% 1-(3-AMinopropyl)-4-(2-Methoxyphenyl)piperazine 97% 20529-23-1 C14H23N3O
(R)-3-((S)-5-(4-fluorophenyl)-5-hydroxypentanoyl)-4-phenyloxazolidin-2-one (R)-3-((S)-5-(4-fluorophenyl)-5-hydroxypentanoyl)-4-phenyloxazolidin-2-one 404874-94-8 C20H20FNO4
(S)-3-((S)-5-hydroxy-5-phenylpentanoyl)-4-phenyloxazolidin-2-one (S)-3-((S)-5-hydroxy-5-phenylpentanoyl)-4-phenyloxazolidin-2-one C20H21NO4
Apixaban Impurity 20 Apixaban Impurity 20 1421823-20-2 C27H29ClN4O5
Posaconazole iMpurity 4 Posaconazole iMpurity 4 2125944-53-6 C30H35N5O3
Everolimus Ring-Opening Impurity Everolimus Ring-Opening Impurity 1708118-13-1 C53H83NO14
Topiroxostat Impurity 6 Topiroxostat Impurity 6 2044704-63-2 C7H8N4O2
Dienogest Impurity I Dienogest Impurity I 65928-65-6 C20H27NO2
Febuxostat Impurity 8 Febuxostat Impurity 8 144060-62-8 C16H17NO4S
Lornoxicam Impurity 9 Lornoxicam Impurity 9 70374-36-6 C6H6ClNO4S2
Ticagrelor Related Compound 3 Ticagrelor Related Compound 3 88756-83-6 C8H15NO3
135270-10-9 135270-10-9 135270-10-9 C12H11F2N3O
Tadalafil EP Impurity Tadalafil EP Impurity 479545-76-1 C21H16N2O5
Vonoprazan Impurity C Vonoprazan Impurity C
(5RS)-5-Ethyl-2,6-diimino-5-phenyl-1,2,5,6-tetrahydropyrimidin-4(3H)-one (5RS)-5-Ethyl-2,6-diimino-5-phenyl-1,2,5,6-tetrahydropyrimidin-4(3H)-one 69125-70-8 C12H14N4O
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
3-(methyl-d3)pyridin-4,5,6-d3-2-amine 3-(methyl-d3)pyridin-4,5,6-d3-2-amine 2247346-23-0 C6H2D6N2
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 2753060-21-6
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
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
Afatinib impurity 48 Afatinib impurity 48
Cabozantinib impurity M Cabozantinib impurity M
Rotigotine Impurity 8 Rotigotine Impurity 8
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