Pharmaceutical Impurity Reference Standards

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Structure Chemical Name CAS MF
N-(2,6-dimethylphenyl)nicotinamide N-(2,6-dimethylphenyl)nicotinamide 84951-65-5 C14H14N2O
Difluoro Atorvastatin Acetonide tert-Butyl Ester Difluoro Atorvastatin Acetonide tert-Butyl Ester 693793-87-2 C40H46F2N2O5
Tirofiban hydrochloride Impurity 6 Tirofiban hydrochloride Impurity 6 2250244-31-4 C17H27NO7S2
Demiditraz IMpurity Demiditraz IMpurity 944268-65-9 C20H20N2
Aprepitant Impurity 16 Aprepitant Impurity 16 850354-60-8
Aripiprazole impurity 20 Aripiprazole impurity 20
Aripiprazole impurity 20 Aripiprazole impurity 20
Blonanserin impurity H Blonanserin impurity H
Captopril impurity 1 Captopril impurity 1
Cefodizime Impurity 6 Cefodizime Impurity 6
Clindamycin Impurity 5 Clindamycin Impurity 5
Dapoxetine Impurity 16 Dapoxetine Impurity 16
Doxofylline Impurity 5 Doxofylline Impurity 5
Everolimus impurity B Everolimus impurity B
FeBuxostat Impurity 27 FeBuxostat Impurity 27
Fosaprepitant Impurity 1 Fosaprepitant Impurity 1 172822-01-4 C23H22F7N4O6P
Hydroxychloroquine Impurity 7 Hydroxychloroquine Impurity 7 47493-14-1 C20H28ClN3O2
Indacaterol Impurity 12 Indacaterol Impurity 12 1026461-20-0 C22H24N2O3
Isavuconazole Impurity 15 Isavuconazole Impurity 15
Isavuconazole Impurity 3 Isavuconazole Impurity 3
Isavuconazole Impurity 8 Isavuconazole Impurity 8
Lenvatinib Impurity 3 Lenvatinib Impurity 3
Linagliptin Impurity 44 Linagliptin Impurity 44
MiraBegron impurity E MiraBegron impurity E
Moxifloxacin Impurity 16 Moxifloxacin Impurity 16
Nifedipine Impurity H Nifedipine Impurity H 74936-71-3 C16H16N2O6
Plerixafor Impurity 3 Plerixafor Impurity 3
Posaconazole Impurity 27 Posaconazole Impurity 27
Posaconazole Impurity 44 Posaconazole Impurity 44 357189-97-0 C21H20F2N4O3
Pramipexole Impurity 10 Pramipexole Impurity 10
rac N-Propyl-2-cyanimidopyrrolidine-5-acetic Acid rac N-Propyl-2-cyanimidopyrrolidine-5-acetic Acid
sofosBuvir Impurity 33 sofosBuvir Impurity 33
sofosBuvir impurity 49 sofosBuvir impurity 49
SofosBuvir Impurity 55 SofosBuvir Impurity 55
Tenofovir Impurity W Tenofovir Impurity W 1244022-55-6 C15H24N5O8P
TerButaline Ep Impurity B TerButaline Ep Impurity B
Timolol EP Impurity H Timolol EP Impurity H 158636-97-6 C13H24N4O3S
Tirofiban Impurity 11 Tirofiban Impurity 11
Tofacitinib Impurity 45 Tofacitinib Impurity 45 2407039-29-4 C16H20N6O2
Tofacitinib impurity S Tofacitinib impurity S
Trelagliptin Impurity 25 Trelagliptin Impurity 25
Valaciclovir EP Impurity H Valaciclovir EP Impurity H 84499-64-9 C11H16N6O4
Lidocaine EP Impurity F Lidocaine EP Impurity F 142713-08-4 C14H22N2O
Ampicillin Impurity P Ampicillin Impurity P
Cefdinir Impurity B (CP) Cefdinir Impurity B (CP)
Cloxacillin Impurity A Cloxacillin Impurity A
Erythromycin Impurity E(EP) Erythromycin Impurity E(EP) 857839-61-3 C37H65NO12
Meropenem Trihydrate Impurity B Meropenem Trihydrate Impurity B 166901-45-7 C34H50N6O10S2
Oxacillin Sodium Impurity D(EP) Oxacillin Sodium Impurity D(EP) 1642559-63-4 C18H21N3O4S
Oxacillin Sodium Impurity J(EP) Oxacillin Sodium Impurity J(EP)
Spectinomycin Impurity A Spectinomycin Impurity A
Eriodictyol-6-glucoside Eriodictyol-6-glucoside 118040-45-2 C21H22O11
Rubrofusarin triglucoside Rubrofusarin triglucoside 245724-07-6 C33H42O20
Gabapentin EP Impurity G Gabapentin EP Impurity G 1500558-49-5 C10H19NO2
2-butyrylbenzoic acid 2-butyrylbenzoic acid 19666-03-6 C11H12O3
Cefminox sodium impurities D Cefminox sodium impurities D
(R)-5-chloro-N-(4-(3-oxomorpholino)phenyl)-N- ((2-oxooxazolidin-5-yl)methyl)thiophene-2-carboxamide (R)-5-chloro-N-(4-(3-oxomorpholino)phenyl)-N- ((2-oxooxazolidin-5-yl)methyl)thiophene-2-carboxamide 1879903-65-7 C19H18ClN3O5S
Cefmetazole impurity Cefmetazole impurity 56796-19-1 C28H27N7O5S3
3-ethylisobenzofuran-1(3H)-one 3-ethylisobenzofuran-1(3H)-one 17475-41-1 C10H10O2
Ivabradine Impurity 21 HCl Ivabradine Impurity 21 HCl 304465-03-0 C26H34N2O5
Moxifloxacin EP Impurity C HCl Moxifloxacin EP Impurity C HCl
Moxifloxacin Impurity 23 Moxifloxacin Impurity 23 855661-74-4 C21H24FN3O4
Solifenacin Related Compound 18 Solifenacin Related Compound 18 1225338-27-1 C23H26N2O2
N-(2-hydroxy-3-(4-((2-isopropoxyethoxy)methyl)phenoxy)propyl) -N-isopropylformamide N-(2-hydroxy-3-(4-((2-isopropoxyethoxy)methyl)phenoxy)propyl) -N-isopropylformamide 1447715-45-8 C19H31NO5
Tofacitinib Related Compound Tofacitinib Related Compound 1206824-85-2 C10H18ClN3O
Fluvastatin EP impurity A -G Fluvastatin EP impurity A -G 93957-58-5 C24H26FNO4
PWKRNMKZGWGSDV-UHFFFAOYSA-N PWKRNMKZGWGSDV-UHFFFAOYSA-N 1422960-88-0 C33H34ClN4+
sodium:(2S)-2-[12-ethyl-8-(hydroxymethyl)-9-oxo-2-(4-piperidin-1-ylpiperidine-1-carbonyl)oxy-11H-indolizino[1,2-b]quinolin-7-yl]-2-hydroxybutanoate sodium:(2S)-2-[12-ethyl-8-(hydroxymethyl)-9-oxo-2-(4-piperidin-1-ylpiperidine-1-carbonyl)oxy-11H-indolizino[1,2-b]quinolin-7-yl]-2-hydroxybutanoate 1329502-92-2 C33H41N4NaO7
QFJAHHNMKTWTGZ-DZAPPIOQSA-N QFJAHHNMKTWTGZ-DZAPPIOQSA-N 2045402-27-3 C35H36ClNO4S
N-(3R)-1-Azabicyclo[2.2.2]oct-3-yl-5,6,7,8-tetrahydro-1-naphthalenecarboxamide N-(3R)-1-Azabicyclo[2.2.2]oct-3-yl-5,6,7,8-tetrahydro-1-naphthalenecarboxamide 1374226-74-0 C18H24N2O
Cefminox Impurity 1 Cefminox Impurity 1
Amlodipine Impurity 25 Amlodipine Impurity 25 C26H31ClN2O8S
Axitinib Impurity 13 Axitinib Impurity 13
Axitinib Impurity 18 Axitinib Impurity 18
Erlotinib Impurity 38 Erlotinib Impurity 38
Etoricoxib Impurity 31 Etoricoxib Impurity 31
Nicorandil Impurity 6 Nicorandil Impurity 6
tirofiban Impurity 1 DIHCl tirofiban Impurity 1 DIHCl
Fingolimod 2-Phenethyl Analog Fingolimod 2-Phenethyl Analog 851039-25-3 C35H57NO2
Ritonavir EP Impurity O Ritonavir EP Impurity O 1414933-81-5 C37H48N6O5S2
Entecavir Impurity 17(Entecavir EP Impurity C) Entecavir Impurity 17(Entecavir EP Impurity C) 2204369-23-1 C12H15N5O4
Gemcitabine Impurity 9 Gemcitabine Impurity 9 2174019-90-8 C16H15F2N3O5
Sacubitril Sacubitril 1361408-17-4 C18H20ClNO2
Empagliflozin Impurity 43 Empagliflozin Impurity 43
1-tosyl-1,4,8,11-tetraazacyclotetradecane trihydrochloride 1-tosyl-1,4,8,11-tetraazacyclotetradecane trihydrochloride 128495-30-7 C17H31ClN4O2S
Fluconazole Fluconazole 163921-62-8 C13H10F2N6
4-(4-chlorothiophen-2-yl)-5-(4-cyclohexylpiperazin-1-yl)thiazol-2-amine 4-(4-chlorothiophen-2-yl)-5-(4-cyclohexylpiperazin-1-yl)thiazol-2-amine 570407-42-0 C17H23ClN4S2
Vecuronium Bromide EP Impurity F Vecuronium Bromide EP Impurity F 18668-29-6 C26H41NO3
4,8-bis(4-((1,4,8,11-tetraazacyclotetradecan-4,8,11- trifluoroacetyl-1-yl)methyl)benzyl)-1,11-difluoroacetyl- 1,4,8,11-tetraazacyclotetradecane 4,8-bis(4-((1,4,8,11-tetraazacyclotetradecan-4,8,11- trifluoroacetyl-1-yl)methyl)benzyl)-1,11-difluoroacetyl- 1,4,8,11-tetraazacyclotetradecane
Imidafenacin Related Compound 11 Imidafenacin Related Compound 11 170105-09-6 C19H17N3
4-[3-(Hydroxymethyl)phenoxy]benzonitrile 4-[3-(Hydroxymethyl)phenoxy]benzonitrile 888967-63-3 C14H11NO2
Acetaminophen Impurity B Acetaminophen Impurity B 98966-17-7 C16H16N2O4
Furosemide Impurity 2 Furosemide Impurity 2 C12H11ClN2O5S
Ribavirin Impurity I Ribavirin Impurity I
Silodosin Impurity 2 Silodosin Impurity 2
Tenofovir Impurity 52 Tenofovir Impurity 52 146297-30-5
Amifostine Impurity 7 Amifostine Impurity 7 174397-83-2 C7H16Br2N2
Bendamustine Impurity 31 Bendamustine Impurity 31
Carbidopa Impurity 2 Carbidopa Impurity 2 1361017-74-4 C11H16N2O4
Cefazolin Impurity 2 Cefazolin Impurity 2
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