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Pharmaceutical Impurity Reference Standards

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Structure Chemical Name CAS MF
7-[[[(CyanoMethyl)thio]acetyl]aMino]-7-Methoxy Cephalosporanic Acid 7-[[[(CyanoMethyl)thio]acetyl]aMino]-7-Methoxy Cephalosporanic Acid 56796-16-8 C15H17N3O7S2
7S-Cefdinir 7S-Cefdinir 178601-89-3 C14H13N5O5S2
Dehydroxy BroMocelecoxib Dehydroxy BroMocelecoxib 170570-75-9 C17H13BrF3N3O2S
Desethylene Norfloxacin Hydrochloride Desethylene Norfloxacin Hydrochloride 75001-77-3 C14H16FN3O3
p-(2,3-Epoxypropoxy)benzyl Alcohol p-(2,3-Epoxypropoxy)benzyl Alcohol 4204-78-8 C10H12O3
α-Etoposide α-Etoposide 100007-53-2 C29H32O13
N-Desmethyl-N-benzyl Sildenafil N-Desmethyl-N-benzyl Sildenafil 1446089-82-2 C28H34N6O4S
4-Hydroxy AtoMoxetine Oxalate 4-Hydroxy AtoMoxetine Oxalate 457634-21-8 C19H23NO6
6-Chloro-1-Ethyl-4-Oxo-7-(Piperazin-1-yl)-1,4-Dihydroquinoline-3-Carboxylic acid 6-Chloro-1-Ethyl-4-Oxo-7-(Piperazin-1-yl)-1,4-Dihydroquinoline-3-Carboxylic acid 67681-84-9 C16H18ClN3O3
Afatinib IMpurity J Afatinib IMpurity J 1456696-14-2 C18H22N4O4
Aprepitant iMpurity A Aprepitant iMpurity A
Atorvastatin LactaM Phenanthrene CalciuM Salt Atorvastatin LactaM Phenanthrene CalciuM Salt 1046378-58-8 C33H35CaFN2O6
Avanafil IMpurity 7 Avanafil IMpurity 7
Desfluoro flurbiprofen axetil Desfluoro flurbiprofen axetil 1685278-08-3 C19H20O4
Desloratadine IMpurity 6 Desloratadine IMpurity 6 38092-90-9 C20H21ClN2
ErtapeneM Ring Open IMpurity ErtapeneM Ring Open IMpurity
LincoMycin iMpurity C LincoMycin iMpurity C
Norfloxacin iMpurity E Norfloxacin iMpurity E
Posaconazole iMpurity 2 Posaconazole iMpurity 2
Quetiapine IMpurity [2-(2-Piperazin-1-yl)ethoxy)ethanol] Quetiapine IMpurity [2-(2-Piperazin-1-yl)ethoxy)ethanol] 2206135-50-2 C25H18N2S2
Rabeprazole iMpurity (Chloro interMediate) Rabeprazole iMpurity (Chloro interMediate)
TaMsulosin IMpurity F TaMsulosin IMpurity F C20H28N2O5S
TiaMulin IMpurity E (TiaMulone,11-Oxo TiaMulin) TiaMulin IMpurity E (TiaMulone,11-Oxo TiaMulin) 113323-39-0 C28H45NO4S
2-(2-(4-(Dibenzo[b,f][1,4]thiazepin-11-yl)piperazin-1-yl)ethoxy)ethanol 2-(2-(4-(Dibenzo[b,f][1,4]thiazepin-11-yl)piperazin-1-yl)ethoxy)ethanol 848814-27-7 C21H27N3O3S
(3aR,7R,7aR)-2,2-Diethyl-3a,6,7,7a-tetrahydro-7-[(Methylsulfonyl)oxy]-1,3-benzodioxole-5-carboxylic Acid Ethyl Ester (3aR,7R,7aR)-2,2-Diethyl-3a,6,7,7a-tetrahydro-7-[(Methylsulfonyl)oxy]-1,3-benzodioxole-5-carboxylic Acid Ethyl Ester 204254-90-0 C15H24O7S
TorseMide Carboxylic Acid TorseMide Carboxylic Acid 113844-99-8 C16H18N4O5S
(6-BroMo-2-ethyl-3-benzofuranyl)(3,5-dibroMo-4-hydroxyphenyl)Methanone (6-BroMo-2-ethyl-3-benzofuranyl)(3,5-dibroMo-4-hydroxyphenyl)Methanone 1402819-05-9 C17H11Br3O3
ApreMilast IMpurity ApreMilast IMpurity
5'-broMo-[2,3'-bipyridin]-6'(1'H)-one 5'-broMo-[2,3'-bipyridin]-6'(1'H)-one 381233-79-0 C10H7BrN2O
Piperacillin Impurity N Piperacillin Impurity N
2-(1-(dimethylamino)ethyl)phenol 2,3-dihydroxysuccinate 2-(1-(dimethylamino)ethyl)phenol 2,3-dihydroxysuccinate 26050-44-2 C10H15NO
1,11-ditosyl-1,4,8,11-tetraazacyclotetradecane dihydrochloride 1,11-ditosyl-1,4,8,11-tetraazacyclotetradecane dihydrochloride 117152-73-5 C24H36N4O4S2
PeraMpanel PeraMpanel 684648-40-6 C10H10BNO2
3-CHLORO-N-(3-METHOXYPHENYL)PROPANAMIDE 3-CHLORO-N-(3-METHOXYPHENYL)PROPANAMIDE 21261-76-7 C10H12ClNO2
Amlodipine Impurity 31 Amlodipine Impurity 31 496024-43-2 C20H22ClNO5
Fudosteine Impurity 5 Fudosteine Impurity 5
Rasagiline Impurity 4 Rasagiline Impurity 4 1175018-79-7 C12H14ClN
Miconazole EP Impurity F Miconazole EP Impurity F 47447-55-2 C18H14Cl4N2O
Raltegravir USP RC E Raltegravir USP RC E 1193687-87-4 C20H22N6O5
Dehydronitrosonisoldipine Dehydronitrosonisoldipine 87375-91-5 C20H22N2O5
Brexpiprazole Impurity 49 Brexpiprazole Impurity 49 1700655-67-9 C13H14N2O2S
Etoricoxib Impurity 38 Etoricoxib Impurity 38 887479-63-2 C13H17NO2S
Pemetrexed Impurity 19 Pemetrexed Impurity 19 1644286-36-1 C20H21N5O8
Empagliflozin Impurity 31 Empagliflozin Impurity 31
Iguratimod Iguratimod 123663-50-3 C18H16N2O6S
1,4-bis(4-((1,4,8,11-tetraazacyclotetradecan-4,8,11-trifluoroacetyl- 1-yl)methyl)benzyl)-8,11-difluoroacetyl-1,4,8,11-tetraazacyclotetra decane 1,4-bis(4-((1,4,8,11-tetraazacyclotetradecan-4,8,11-trifluoroacetyl- 1-yl)methyl)benzyl)-8,11-difluoroacetyl-1,4,8,11-tetraazacyclotetra decane
Imidafenacin Related Compound 10 Imidafenacin Related Compound 10 212756-27-9 C21H23N3O
Aprepitant Aprepitant 1242175-36-5 C20H18F7NO2
Idebenone Impurity 5 Idebenone Impurity 5 88543-33-3 C18H28O5
Entacapone Impurity 4 Entacapone Impurity 4 1202160-40-4 C11H8N2O6
L-Leucine, N-formyl-, (1S)-1-[[(2S,3S)-3-hexyl-4-oxo-2-oxetanyl]methyl]tridecyl ester L-Leucine, N-formyl-, (1S)-1-[[(2S,3S)-3-hexyl-4-oxo-2-oxetanyl]methyl]tridecyl ester 1119226-56-0 C30H55NO5
Itraconazole Impurity 17 Itraconazole Impurity 17 854372-78-4 C14H15Cl2N3O5S
sodium (41S,12R,13aS)-13a-ethyl-12-hydroxy-2,3,41,5,6,12, 13,13a-octahydro-1H-indolo[3,2,1-de]pyrido[3,2,1-ij][1,5] naphthyridine-12-carboxylate sodium (41S,12R,13aS)-13a-ethyl-12-hydroxy-2,3,41,5,6,12, 13,13a-octahydro-1H-indolo[3,2,1-de]pyrido[3,2,1-ij][1,5] naphthyridine-12-carboxylate 53448-45-6 C20H24N2O3
Rivaroxaban Impurity 35 Rivaroxaban Impurity 35 2206360-74-7 C23H24N4O6
Tirofiban hydrochloride monohydrate Impurity 7 Tirofiban hydrochloride monohydrate Impurity 7 2250244-28-9 C13H19NO5S
Acarbose Impurity G Acarbose Impurity G
Imidafenacin Related Compound 7 Imidafenacin Related Compound 7 191592-57-1 C16H13N
17β-Cyanmethyl-oestra-1,3,5(10)-trien-3,17β-diol 17β-Cyanmethyl-oestra-1,3,5(10)-trien-3,17β-diol 16669-06-0 C20H25NO2
Cefaclor Impurity 6 Cefaclor Impurity 6
Cephalexin Impurity 6 Cephalexin Impurity 6 C16H17N3O4S
Pitavastatin Impurity 42 Pitavastatin Impurity 42
Rocuronium bromide Impurity J Rocuronium bromide Impurity J C32H53BrN2O4
Tofacitinib Impurity 72 Tofacitinib Impurity 72
Tofacitinib Impurity 81 Tofacitinib Impurity 81
Topiroxostat Impurity 9 Topiroxostat Impurity 9 2044708-04-3 C7H10N6O
Vinorelbine EP Impurity C Vinorelbine EP Impurity C
Atracurium Impurity 26 Atracurium Impurity 26
Aztreonam Impurity 2 Aztreonam Impurity 2
Benazepril Impurity E Benazepril Impurity E C24H28N2O5
Canagliflozin Impurity 44 Canagliflozin Impurity 44
Clotrimazole Impurity 3 Clotrimazole Impurity 3
Dithio-Desethyl Carbodenafil Dithio-Desethyl Carbodenafil 1610830-81-3 C22H28N6OS2
Erlotinib Impurity 57 Erlotinib Impurity 57
Esomeprazole Impurity 41 Esomeprazole Impurity 41
Oseltamivir Impurity 29 Oseltamivir Impurity 29
Pramipexole Impurity 36 Pramipexole Impurity 36
Riboflavin Impurity 1 Riboflavin Impurity 1 64480-68-8 C16H20N2O7
Rocuronium Bromide Impurity 10 Rocuronium Bromide Impurity 10
Rocuronium Bromide Impurity 23 Rocuronium Bromide Impurity 23 C23H39NO3
Adefovir Impurity 10 Adefovir Impurity 10
Apremilast Impurity SY Apremilast Impurity SY
Atracurium Impurity L Atracurium Impurity L
Cefoxitin EP Impurity G Cefoxitin EP Impurity G
Dextrorotation lansoprazole Impurity L Dextrorotation lansoprazole Impurity L
lansoprazole Impurity 25 lansoprazole Impurity 25
Mirabegron Enantiomer Impurity Mirabegron Enantiomer Impurity
Ropivacaine Impurity 44 Ropivacaine Impurity 44
Ropivacaine Impurity 7 Ropivacaine Impurity 7
Sugammadex sodium Org199010-1 Impurity Sugammadex sodium Org199010-1 Impurity
Sugammadex sodium Org226100-1 Impurity Sugammadex sodium Org226100-1 Impurity
Afatinib impurity 32 Afatinib impurity 32
Butyphthalide impurity 26 Butyphthalide impurity 26
Butyphthalide impurity 32 Butyphthalide impurity 32
Canagliflozin Impurity 30 Canagliflozin Impurity 30
Celecoxib Impurity 20 Celecoxib Impurity 20 343853-74-7 C6H7N3O3S
Emtricitabine Impurity CFTU1 Emtricitabine Impurity CFTU1
Esomeprazole Impurity 34 Esomeprazole Impurity 34
Febuxostat Impurity 82 Febuxostat Impurity 82
Febuxostat Impurity 87 Febuxostat Impurity 87
Gefitinib Impurity R Gefitinib Impurity R
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