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Pharmaceutical Impurity Reference Standards

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Structure Chemical Name CAS MF
Levosimendan Nitrosogenin Impurities Levosimendan Nitrosogenin Impurities
7-(ALPHA-BROMOACETAMIDO)CEPHALOSPORANIC ACID 7-(ALPHA-BROMOACETAMIDO)CEPHALOSPORANIC ACID 26973-80-8 C12H13BrN2O6S
Bumetanide Impurity 20 Bumetanide Impurity 20
Rocuronium Bromide Impurity 28 、29 Rocuronium Bromide Impurity 28 、29
Roxadustat Impurity 22 Roxadustat Impurity 22
Olaparib Impurity 41 Olaparib Impurity 41
Perospirone Impurity 22 Perospirone Impurity 22
Perospirone Impurity 14 Perospirone Impurity 14 87691-94-9 C15H20BrN3S
Dolutegravir Impurity 22 Dolutegravir Impurity 22
Paxlovid Impurity 20 Paxlovid Impurity 20
Related impurities 7 of fluoxetine sodium Related impurities 7 of fluoxetine sodium
Revefenacin Impurity 16 Revefenacin Impurity 16
Fondaparinux sodium impurity 8 Fondaparinux sodium impurity 8
Fondaparinux sodium impurity 14 Fondaparinux sodium impurity 14
Fondaparinux Sodium Impurity 9 Fondaparinux Sodium Impurity 9
Oxacillin sodium Impurity D Oxacillin sodium Impurity D
Piracetam IMPURITY Piracetam IMPURITY
Nilotinib N-Oxide Impurity 4 Nilotinib N-Oxide Impurity 4
sodium (6R,7S)-7-amino-7-methoxy-6-methyl-3-(((1-methyl-1H-tetrazol-5-yl)thio)methyl)-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylate sodium (6R,7S)-7-amino-7-methoxy-6-methyl-3-(((1-methyl-1H-tetrazol-5-yl)thio)methyl)-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylate
Olodaterol Impurity 32 Olodaterol Impurity 32
(R)-Lercanidipine Hydrochloride (R)-Lercanidipine Hydrochloride 187731-34-6 C36H42ClN3O6
2-Oxo Clopidogrel Hydrochloride (Mixture of diastereomers) 2-Oxo Clopidogrel Hydrochloride (Mixture of diastereomers) 109904-27-0 C16H16ClNO3S
5-Hydroxy-6-methoxy-1-indanone 5-Hydroxy-6-methoxy-1-indanone 127399-78-4 C10H10O3
Desfluoro Citalopram Oxalate Desfluoro Citalopram Oxalate 1093072-86-6 C22H24N2O5
Didesmethyl Zolmitriptan Didesmethyl Zolmitriptan 139264-15-6 C14H17N3O2
Gabapentin Related Compound E Gabapentin Related Compound E 67950-95-2 C9H14O4
Hydroxy Bosentan Hydroxy Bosentan 253688-60-7 C27H29N5O7S
Lisinopril S,S,S-Diketopiperazine Lisinopril S,S,S-Diketopiperazine 328385-86-0 C21H29N3O4
rac 4-Desmethoxy-4-nitro Omeprazole rac 4-Desmethoxy-4-nitro Omeprazole 317807-10-6 C16H16N4O4S
trans 1-Benzyl-4-(4-fluorophenyl)-3-piperidinemethanol trans 1-Benzyl-4-(4-fluorophenyl)-3-piperidinemethanol 201855-60-9 C19H22FNO
ETHYL 7-CHLORO-1-ETHYL-6-FLUORO-1,4-DIHYDRO-4-OXO-QUINOLINE-5-CARBOXYLATE ETHYL 7-CHLORO-1-ETHYL-6-FLUORO-1,4-DIHYDRO-4-OXO-QUINOLINE-5-CARBOXYLATE 70458-94-5 C14H13ClFNO3
Diltiazem impurity Diltiazem impurity 115992-91-1 C17H18N2O3S
Raloxifene EP IMpurity Raloxifene EP IMpurity 1700655-64-6 C13H15ClN2O2S
Parecoxib Impurity M Parecoxib Impurity M
Cycloocta[b]pyridine, 2-(4-ethyl-1-piperazinyl)-4-[4-(4-ethyl-1-piperazinyl)phenyl]-5,6,7,8,9,10-hexahydro- Cycloocta[b]pyridine, 2-(4-ethyl-1-piperazinyl)-4-[4-(4-ethyl-1-piperazinyl)phenyl]-5,6,7,8,9,10-hexahydro- 1648791-23-4 C29H43N5
Linagliptin Impurity O Linagliptin Impurity O
Linagliptin Impurity T Linagliptin Impurity T
(R)-2-((6-(3-aminopiperidin-1-yl)-3-methyl-2,4-dioxo-3,4-dihydropyrimidin-1(2H)-yl)methyl)-4-fluorobenzamide (R)-2-((6-(3-aminopiperidin-1-yl)-3-methyl-2,4-dioxo-3,4-dihydropyrimidin-1(2H)-yl)methyl)-4-fluorobenzamide C18H22FN5O3
Apremilast Impurity 2 Apremilast Impurity 2
Etoricoxib Impurity 16 Etoricoxib Impurity 16
Ibrutinib Impurity 2 Ibrutinib Impurity 2
Mirabegron Impurity 14 Mirabegron Impurity 14
Vonoprazan Impurity 1 Vonoprazan Impurity 1 881732-90-7 C17H17N3O2S
Atenolol EP Impurity Atenolol EP Impurity C14H22N2O3
Cinacalcet Impurity 20 Cinacalcet Impurity 20
Dapagliflozin Impurity 11 Dapagliflozin Impurity 11
Dasatinib Impurity C Dasatinib Impurity C
Etoricoxib impurity Q Etoricoxib impurity Q 292067-97-1 C18H15ClN2S
Flucloxacillin Impurity Flucloxacillin Impurity
Fluorometholone Impurity Fluorometholone Impurity 2796-99-8 C23H31FO7S
Verapamil Impurity Verapamil Impurity 1551304-28-9 C12H19NO2
Clopidogrel impurity reference substance Clopidogrel impurity reference substance C15H14ClNO2S
Vildagliptin Impurity Vildagliptin Impurity
Aloeemodin-ω-O-β-D-glucopyranoside Aloeemodin-ω-O-β-D-glucopyranoside 29010-56-8 C21H20O10
ethyl 1-(4-chlorophenyl)-7-oxo-6-(4-(2-oxopiperidin-1-yl)phenyl)-4,5,6,7-tetrahydro-1H-pyrazolo[3,4-c]pyridine-3-carboxylate ethyl 1-(4-chlorophenyl)-7-oxo-6-(4-(2-oxopiperidin-1-yl)phenyl)-4,5,6,7-tetrahydro-1H-pyrazolo[3,4-c]pyridine-3-carboxylate 2029205-62-5 C26H25ClN4O4
1-Butanaminium, N,N,N-tributyl-, (1R,2S,5R)-2-(aminocarbonyl)-7-oxo-1,6-diazabicyclo[3.2.1]oct-6-yl sulfate 1-Butanaminium, N,N,N-tributyl-, (1R,2S,5R)-2-(aminocarbonyl)-7-oxo-1,6-diazabicyclo[3.2.1]oct-6-yl sulfate 1192651-80-1 C23H46N4O6S
Dihydroxyoxaliplatin(Oxaliplatin Impurity Ⅲ) Dihydroxyoxaliplatin(Oxaliplatin Impurity Ⅲ)
cefditoren E-isomer(C=C) cefditoren E-isomer(C=C)
Mixture of Lamivudine Impurity Ⅳ and Impurity Ⅴ Mixture of Lamivudine Impurity Ⅳ and Impurity Ⅴ
2-Ethoxybenzimidohydrazide 2-Ethoxybenzimidohydrazide 889943-46-8 C9H13N3O
(E)-2-(6-(methoxycarbonyl)-2-oxoindolin-3-ylidene)-2-phenylacetic acid (E)-2-(6-(methoxycarbonyl)-2-oxoindolin-3-ylidene)-2-phenylacetic acid C18H13NO5
8-Epi-cyanocobalamin 8-Epi-cyanocobalamin 41325-63-7 C63H88CoN14O14P
Lamivudine Impurity 2 Lamivudine Impurity 2 200396-21-0 C18H27N3O4S
Lamivudine Impurity 1 Lamivudine Impurity 1 1235712-40-9 C8H11N3O4S
Moxifloxacin Related Impurity 3 Moxifloxacin Related Impurity 3
Bisoprolol EP Impurity Q Bisoprolol EP Impurity Q 1346604-00-9 C16H27NO4
Levofloxacin N-Oxide Levofloxacin N-Oxide 117678-37-2 C18H20FN3O5
Oseltamivir EP Impurity A Oseltamivir EP Impurity A 1391047-93-0 C14H24N2O4
Quetiapine EP Impurity N Quetiapine EP Impurity N 1800291-86-4 C29H41N5O3S
Ceftazidime Impurity Ceftazidime Impurity
Chlorhexidine Digluconate Impurity N Chlorhexidine Digluconate Impurity N 152504-10-4 C15H25ClN8
S-Azetidin-3-yl ethanethioate HCl S-Azetidin-3-yl ethanethioate HCl 886615-18-5 C5H9NOS
Olaparib Impurity C Olaparib Impurity C
Olaparib Impurity F Olaparib Impurity F
Dapoxetine Impurity 4 Dapoxetine Impurity 4
Glycopyrrolate impurity 3 Glycopyrrolate impurity 3
Lamotrigine impurity B Lamotrigine impurity B
Ramosetron Impurity 3 Ramosetron Impurity 3
Loratadine Impurity 1 Loratadine Impurity 1 C22H23ClN2O2
Metoprolol IMpurity 6 Metoprolol IMpurity 6 C15H25NO3
Pitavastatin Impurity 5 Pitavastatin Impurity 5
Prasugrel Impurity C Prasugrel Impurity C
Trifluridine Impurity 2 Trifluridine Impurity 2
Cefazolin Impurity 4 Cefazolin Impurity 4
Vonoprazan Impurity 3 Vonoprazan Impurity 3
Cinacalcene Impurity I Cinacalcene Impurity I
Valsartan Impurity 2 Valsartan Impurity 2 C24H29N5O3
Istradefylline Impurity 2 Istradefylline Impurity 2
Etoricoxib Impurity 3 Etoricoxib Impurity 3
Apremilast Impurity 5 Apremilast Impurity 5 200710-04-9 C11H13NO4
Topiroxostat Imp.C Topiroxostat Imp.C
(3R,4S)-1-(4-chlorophenyl)-3-((S)-3-(4-fluorophenyl)-3-hydroxypropyl)-4-(4-hydroxyphenyl)azetidin-2-one (3R,4S)-1-(4-chlorophenyl)-3-((S)-3-(4-fluorophenyl)-3-hydroxypropyl)-4-(4-hydroxyphenyl)azetidin-2-one 1700622-08-7 C24H21ClFNO3
Rabeprazole Impurity 2 Rabeprazole Impurity 2 1163685-31-1 C11H15NO4
Regorafenib Impurity 8 Regorafenib Impurity 8
Flomoxef Impurity 5 Flomoxef Impurity 5 134237-56-2 C25H23ClF2N2O6S
Ranitidine impurity Ranitidine impurity 94167-82-5 C10H18N2O
nicergoline impurity E nicergoline impurity E
ethyl(2R,4S)-5-([1,1'-biphenyl]-4-yl)-4-(4-ethoxy-4-oxobutanamido)-2-methylpentanoate ethyl(2R,4S)-5-([1,1'-biphenyl]-4-yl)-4-(4-ethoxy-4-oxobutanamido)-2-methylpentanoate C26H33NO5
Tacrolimus Impurity C Tacrolimus Impurity C
Levodopa impurity 5 Levodopa impurity 5
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