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Pharmaceutical Impurity Reference Standards

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Structure Chemical Name CAS MF
Empagliflozin Impurity 24 Empagliflozin Impurity 24
FeBuxostat impurity 31 FeBuxostat impurity 31
Formoterol Fumarate Dihydrate EP Impurity I Formoterol Fumarate Dihydrate EP Impurity I 532414-36-1 C19H24N2O4
Fosaprepitant Impurity 3 Fosaprepitant Impurity 3
Fosfomycin Trometamol EP Impurity D Fosfomycin Trometamol EP Impurity D 1262243-12-8 C10H25NO11P2
Isavuconazole Impurity 17 Isavuconazole Impurity 17
Isavuconazole Impurity 5 Isavuconazole Impurity 5
Moxifloxacin Impurity 21 Moxifloxacin Impurity 21
Mupirocin EP Impurity A Mupirocin EP Impurity A C26H44O9
Nifendipine Impurity G Nifendipine Impurity G 74378-10-2 C15H14N2O6
Olaparib Impurity 5 Olaparib Impurity 5
Plerixafor Impurity 5 Plerixafor Impurity 5
Posaconazole Impurity 30 Posaconazole Impurity 30
Posaconazole Impurity 35 Posaconazole Impurity 35 1370190-85-4 C14H13F2N3O
Posaconazole Impurity 51 Posaconazole Impurity 51 357189-94-7 C37H40F2N8O5
Posaconazole Impurity 59 Posaconazole Impurity 59
Ramosetron Impurity 13 Ramosetron Impurity 13 183613-77-6 C17H13N3O
Sitafloxacin Impurity 2 Sitafloxacin Impurity 2
Sitagliptin Impurity 10 Sitagliptin Impurity 10 1253056-01-7 C16H14F6N4O2
SofosBuvir Impurity 18 SofosBuvir Impurity 18
sofosBuvir Impurity 35 sofosBuvir Impurity 35
SofosBuvir Impurity 51 SofosBuvir Impurity 51
SofosBuvir Impurity 58 SofosBuvir Impurity 58
Sulbactam EP Impurity G Sulbactam EP Impurity G
Ticagrelor impurity 21 Ticagrelor impurity 21
Tirofiban Impurity 13 Tirofiban Impurity 13 C27H45N3O3
Tofacitinib impurity U Tofacitinib impurity U
Vortioxetine impurity S Vortioxetine impurity S 1815608-51-5 C18H22N2S
Linagliptin N-Acetyl Impurity Linagliptin N-Acetyl Impurity 1803079-49-3 C27H30N8O3
(1R,3R)-1-(benzo[d][1,3]dioxol-5-yl)-2,3,4,9-tetrahydro-1H-pyrido[3,4-b]indole-3-carboxylic acid (1R,3R)-1-(benzo[d][1,3]dioxol-5-yl)-2,3,4,9-tetrahydro-1H-pyrido[3,4-b]indole-3-carboxylic acid 474668-76-3 C19H16N2O4
Lidocaine Impurity Lidocaine Impurity 70336-49-1 C20H22N2O2
(E)-2-cyano-3-hydroxy-N-[4-(trifluoromethyl)phenyl]but-2-enamide (E)-2-cyano-3-hydroxy-N-[4-(trifluoromethyl)phenyl]but-2-enamide 214782-56-6 C12H9F3N2O2
Amoxicillin Impurity O Amoxicillin Impurity O C16H19N3O5S
Ampicillin Impurity R Ampicillin Impurity R
Spectinomycin Impurity C Spectinomycin Impurity C
Amifostine Impurity 2 Amifostine Impurity 2
Brexpiprazole Impurity Brexpiprazole Impurity 2138169-93-2 C41H47N5O2S2
Cefoxitin impurity EF Cefoxitin impurity EF
Tenofovir Impurity 38 Tenofovir Impurity 38 161760-09-4 C8H11O6PS
N-(4-methyl-3-(3-(4-((4-methylpiperazin-1-yl)methyl)benzoyl)guanidino)phenyl)-4-(4-methylpiperazin-1-yl)benzamide N-(4-methyl-3-(3-(4-((4-methylpiperazin-1-yl)methyl)benzoyl)guanidino)phenyl)-4-(4-methylpiperazin-1-yl)benzamide C33H42N8O2
Apremilast Apremilast 1384440-16-7 C19H20N2O6S
XMUJPIDSOJTMMS-VTBMCCKRSA-N XMUJPIDSOJTMMS-VTBMCCKRSA-N 212505-49-2 C21H30O3
XLMHAABXFLIUNQ-UHFFFAOYSA-N XLMHAABXFLIUNQ-UHFFFAOYSA-N 368451-15-4 C24H26O3
NMEICKDXQPVPKK-UHFFFAOYSA-N NMEICKDXQPVPKK-UHFFFAOYSA-N 120244-82-8 C16H19ClN2O
4-Methylpiperazine-1-carbonyl chloride 4-Methylpiperazine-1-carbonyl chloride 39539-66-7 C6H11ClN2O
Epoxy Exemestane (6-Beta Isomer) Epoxy Exemestane (6-Beta Isomer) 152764-31-3 C20H24O3
AFTMPFJWAIDLME-QWHCGFSZSA-N AFTMPFJWAIDLME-QWHCGFSZSA-N 1808087-53-7 C15H19N3O3S
6-Cyclopropyl-10-fluorobenzo[k]phenanthridine 6-Cyclopropyl-10-fluorobenzo[k]phenanthridine 1187966-95-5 C20H14FN
4-[2-fluoro-4-[2-(methylcarbamoyl)pyridin-4-yl]oxyanilino]-N-methylpyridine-2-carboxamide 4-[2-fluoro-4-[2-(methylcarbamoyl)pyridin-4-yl]oxyanilino]-N-methylpyridine-2-carboxamide 1855006-12-0 C20H18FN5O3
2,2'-((piperazine-1,4-disulfonyl)bis(2-ethoxy-5,1-phenylene))bis(5-methyl-7-propylimidazo[5,1-f][1,2,4]triazin-4(3H)-one) 2,2'-((piperazine-1,4-disulfonyl)bis(2-ethoxy-5,1-phenylene))bis(5-methyl-7-propylimidazo[5,1-f][1,2,4]triazin-4(3H)-one) 1255919-03-9 C38H46N10O8S2
Bortezomib Impurity P Bortezomib Impurity P
Esmolol impurity A Esmolol impurity A
(5-(4-fluorophenyl)thiophen-2-yl)(5-iodo-2-methylphenyl)methanol (5-(4-fluorophenyl)thiophen-2-yl)(5-iodo-2-methylphenyl)methanol 1818268-45-9 C18H14FIOS
2-propyl-1H-indene-1,3(2H)-dione 2-propyl-1H-indene-1,3(2H)-dione 14570-43-5 C12H12O2
GLORIOSINE GLORIOSINE 7411-12-3 C21H23NO6
Labetalone hydrochloride Labetalone hydrochloride 96441-14-4 C19H22N2O3.ClH
6-amino-2-(1-(2-fluorobenzyl)-1H-pyrazolo[3,4-b]pyridin-3-yl)- 7,9-dimethyl-7,9-dihydro-8H-purin-8-one 6-amino-2-(1-(2-fluorobenzyl)-1H-pyrazolo[3,4-b]pyridin-3-yl)- 7,9-dimethyl-7,9-dihydro-8H-purin-8-one 1361569-23-4 C20H17FN8O
5-(1-amino-2-(methylsulfonyl)ethyl)-2-methoxyphenol 5-(1-amino-2-(methylsulfonyl)ethyl)-2-methoxyphenol 2169153-70-0 C10H15NO4S
Bendamustine Impurity 14 Bendamustine Impurity 14
Canagliflozin Impurity 28 Canagliflozin Impurity 28
Edoxaban Impurity 24 (1S,2S,4R) Edoxaban Impurity 24 (1S,2S,4R) 2024614-21-7 C21H30ClN5O5
Edoxaban Impurity 39 Edoxaban Impurity 39 2081883-55-6 C14H27N3O3
Ezetimibe Impurity 34 Ezetimibe Impurity 34 2280081-69-6 C20H21NO4
Linagliptin Impurity 33 Linagliptin Impurity 33 2443735-53-1 C38H42N10O4
Milrinone Impurity 15 Milrinone Impurity 15 156033-07-7 C12H9N3O2
Milrinone Impurity 6 Milrinone Impurity 6
Pantoprazole Impurity 2 Pantoprazole Impurity 2
rac-Valsartan EP Impurity B rac-Valsartan EP Impurity B 1894176-44-3 C31H35N5O3
Sitafloxacin Dechloro Impurity Sitafloxacin Dechloro Impurity
Ticagrelor Related Compound 85 Ticagrelor Related Compound 85 1628340-74-8 C28H34F2N6O5S
Valsartan Impurity 12 Valsartan Impurity 12 1189547-11-2 C11H21NO3
Vonoprazan Impurity 17 Vonoprazan Impurity 17
Avibactam Impurity B Avibactam Impurity B
Brexpiprazole Impurity L Brexpiprazole Impurity L
Cefaclor Impurity 4 Cefaclor Impurity 4
Linagliptin Impurity 38 Linagliptin Impurity 38 1979144-52-9 C20H17ClN6O2
Pidotimod Impurity N Pidotimod Impurity N
Pitavastatin (3S,5S)-Isomer Ethyl Ester Pitavastatin (3S,5S)-Isomer Ethyl Ester
Pramipexole Impurity 3 Pramipexole Impurity 3
Rupatadine Impurity A Rupatadine Impurity A
Sulpiride Impurity 2 Sulpiride Impurity 2
Tenofovir Impurity 55 Tenofovir Impurity 55
Voriconazole Impurity F Voriconazole Impurity F
Atorvastatin Impurity F Atorvastatin Impurity F 1371615-56-3 C66H68CaF2N4O10
Ambroxol Impurity 8(Ambroxol Impurity M) Ambroxol Impurity 8(Ambroxol Impurity M) 1445719-53-8 C13H16Br2N2O
Cefdinir impurity PQ mixture Cefdinir impurity PQ mixture
Loratadine Impurity 16 Loratadine Impurity 16 C22H23ClN2O2
Meptazinol BP Impurity D Meptazinol BP Impurity D 1883577-02-3 C30H44N2O
Prasugrel Impurity 12 Prasugrel Impurity 12
Pregabalin Impurity 16 Pregabalin Impurity 16
Nintedanib Impurity 26 Nintedanib Impurity 26
(3R,4R)-N,1,4-trimethyl-N-{7H-pyrrolo[2,3-d]pyrimidin-4-yl}piperidin-3-amine (3R,4R)-N,1,4-trimethyl-N-{7H-pyrrolo[2,3-d]pyrimidin-4-yl}piperidin-3-amine 2227197-38-6 C14H21N5
Varenicline Impurity 1 Varenicline Impurity 1
Amlodipine Impurity 27 Disodium Salt Amlodipine Impurity 27 Disodium Salt 120289-11-4 C19H20ClNO7
Erlotinib Impurity 47 HCl Erlotinib Impurity 47 HCl
Etoricoxib Impurity 33 Etoricoxib Impurity 33
2,2-dichloro-N-(2,3-dimethylphenyl)acetamide 2,2-dichloro-N-(2,3-dimethylphenyl)acetamide 18823-63-7 C10H11Cl2NO
2-(1-HydroxyCyclohexyl)-2-(4-MethoxyPhenyl)Acetonitrile 2-(1-HydroxyCyclohexyl)-2-(4-MethoxyPhenyl)Acetonitrile 93413-76-4 C15H19NO2
7-Hydroxy Alosetron 7-Hydroxy Alosetron 863485-44-3 C17H18N4O2
Dolutegravir 2-Desfluoro Impurity Dolutegravir 2-Desfluoro Impurity 1863916-88-4 C20H20FN3O5
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