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Pharmaceutical Impurity Reference Standards

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Structure Chemical Name CAS MF
TenoxicaM IMpurity E (2-Methylthieno[2,3-d]isothiazol-3(2H)-one-1,1-dioxide ) TenoxicaM IMpurity E (2-Methylthieno[2,3-d]isothiazol-3(2H)-one-1,1-dioxide ) 94040-09-2 C6H5NO3S2
(+)-(14β)-Dihydrovinpocetine (+)-(14β)-Dihydrovinpocetine 57517-54-1 C22H28N2O2
D,L-Venlafaxine-d10 Hydrochloride D,L-Venlafaxine-d10 Hydrochloride 1216539-56-8 C17H28ClNO2
Ceritinib IMpurity Ceritinib IMpurity
Melphalan IMpurity Melphalan IMpurity
1-[2-[(5-chloro-2,4-diMethylphenyl)thio]phenyl]- Piperazine 1-[2-[(5-chloro-2,4-diMethylphenyl)thio]phenyl]- Piperazine 1240670-87-4 C18H21ClN2S
monocalcium mono((3R,5S,E)-7-(4-(3-fluorophenyl)-6-isopropyl-2- (N-methylmethylsulfonamido)pyrimidin-5-yl)-3,5-dihydroxyhept-6- enoate) monocalcium mono((3R,5S,E)-7-(4-(3-fluorophenyl)-6-isopropyl-2- (N-methylmethylsulfonamido)pyrimidin-5-yl)-3,5-dihydroxyhept-6- enoate)
Cefradine Impurity J Cefradine Impurity J
Peramivir diacetyl impurity 1 Peramivir diacetyl impurity 1
Urapidil Impurity 17 Urapidil Impurity 17
Clindamycin Impurity 86 Clindamycin Impurity 86
Canagliflozin Impurity 77 Canagliflozin Impurity 77
Carbazochrome Sodium Sulfonate Impurity I Carbazochrome Sodium Sulfonate Impurity I
Tadalafil impurities 45 Tadalafil impurities 45
Posaconazole Impurities 10 Complete Set Posaconazole Impurities 10 Complete Set
Cetrorelix Impurity 18 Cetrorelix Impurity 18
Cetrorelix Impurity 13 Cetrorelix Impurity 13
Bortezomib Impurity G Full Set Pre- Bortezomib Impurity G Full Set Pre-
Cetrorelix Impurity 2 (+L-Ser) Cetrorelix Impurity 2 (+L-Ser)
Peramivir Intermediate Impurity 39 Peramivir Intermediate Impurity 39
Peramivir Intermediate Impurity 59 Peramivir Intermediate Impurity 59
Criborole impurity 999 Criborole impurity 999
Atracurium impurity O drops Atracurium impurity O drops
Pemetrexed Disodium Impurity 21-30 Pemetrexed Disodium Impurity 21-30
Bimatoprost Impurity 2 Bimatoprost Impurity 2
Guanosine Guanosine 30747-23-0 C18H21N5O9
Minoxidil Impurity G Minoxidil Impurity G
Brivaracet amoxidation Impurity 2 Brivaracet amoxidation Impurity 2
Sugammadex Impurity U Sugammadex Impurity U
3-(6'-oxo-1'-phenyl-1',6'-dihydro-[2,3'-bipyridin]-5'-yl)-[1,1'-biphenyl]-2,2'-dicarbonitrile 3-(6'-oxo-1'-phenyl-1',6'-dihydro-[2,3'-bipyridin]-5'-yl)-[1,1'-biphenyl]-2,2'-dicarbonitrile
Cefmetazole Sodium Impurity B Cefmetazole Sodium Impurity B
(3R,5S,E)-tert-butyl 7-(4-(3-fluorophenyl)-6-isopropyl-2-(N-methylmethylsulfonamido)pyrimidin-5-yl)-3,5-dihydroxyhept-6-enoate (3R,5S,E)-tert-butyl 7-(4-(3-fluorophenyl)-6-isopropyl-2-(N-methylmethylsulfonamido)pyrimidin-5-yl)-3,5-dihydroxyhept-6-enoate
1-Piperazinebutanol, 4-(1,2-benzisothiazol-3-yl)- 1-Piperazinebutanol, 4-(1,2-benzisothiazol-3-yl)- 159729-16-5 C15H21N3OS
1,4-Piperazinedibutanol 1,4-Piperazinedibutanol 92036-96-9 C12H26N2O2
1H-Benz[de]isoquinolin-1-one, 2-(3S)-1-azabicyclo[2.2.2]oct-3-yl-2,3,3a,4,5,6-hexahydro-6-hydroxy-, (3aS)- 1H-Benz[de]isoquinolin-1-one, 2-(3S)-1-azabicyclo[2.2.2]oct-3-yl-2,3,3a,4,5,6-hexahydro-6-hydroxy-, (3aS)- 2446343-19-5 C19H24N2O2
2-yl)oxy)-6,8,11-trihydroxy-8-(((2S,3S,4S,6R)-3-hydroxy-2-methyl-6-(((1S,3S)-3,5,12-trihydroxy-3-(2-hydroxyacetyl)-10-methoxy-6,11-dioxo-1,2,3,4,6,11- 2-yl)oxy)-6,8,11-trihydroxy-8-(((2S,3S,4S,6R)-3-hydroxy-2-methyl-6-(((1S,3S)-3,5,12-trihydroxy-3-(2-hydroxyacetyl)-10-methoxy-6,11-dioxo-1,2,3,4,6,11-
PANTOPRAZOLE SULFONE N-OXIDE PANTOPRAZOLE SULFONE N-OXIDE 953787-55-8 C16H15F2N3O6S
(R)-5-(aminomethyl)-2-((R)-carboxy((Z)-2-(furan-2-yl)-2-(methoxyimino)acetamido)methyl)-3,6-dihydro-2H-1,3-thiazine-4-carboxylic acid (R)-5-(aminomethyl)-2-((R)-carboxy((Z)-2-(furan-2-yl)-2-(methoxyimino)acetamido)methyl)-3,6-dihydro-2H-1,3-thiazine-4-carboxylic acid
Isavuconazole Impurity 44 Isavuconazole Impurity 44
Cobinic acid-abdeg-pentamide, Co-(cyano-κC)-, dihydrogen phosphate (ester), inner salt, 3'-ester with (5,6-dimethyl-1-α-D-ribofuranosyl-1H-benzimidazole-κN3) (9CI) Cobinic acid-abdeg-pentamide, Co-(cyano-κC)-, dihydrogen phosphate (ester), inner salt, 3'-ester with (5,6-dimethyl-1-α-D-ribofuranosyl-1H-benzimidazole-κN3) (9CI) 38437-93-3 C63H87CoN13O15P
Avatrombopag Impurity 75 Avatrombopag Impurity 75
Atorvastatin Impurity N(Calcium salt Atorvastatin Impurity N(Calcium salt
Rosuvastatin Impurity 164 Rosuvastatin Impurity 164
Rosuvastatin Impurity 123 Rosuvastatin Impurity 123
Relugolix Impurity 20 Relugolix Impurity 20
7-PACE Impurity 2 7-PACE Impurity 2
5-(1-Methyl-4-Piperidyl)5H-Dibenzo 5-(1-Methyl-4-Piperidyl)5H-Dibenzo 3967-32-6 C21H23NO
Ertapenem Impurity I(USP) Ertapenem Impurity I(USP)
Penicillin EP  Impurity A Penicillin EP Impurity A
Voriconzolegenotoxicimpurity Voriconzolegenotoxicimpurity
N4,N7-bis(3-chloro-4-fluorophenyl)-8-nitroquinazoline-4,7-diamine N4,N7-bis(3-chloro-4-fluorophenyl)-8-nitroquinazoline-4,7-diamine
1H-Benzimidazole-2-butanoic acid, 5-[(2-hydroxyethyl)amino]-1-methyl- 1H-Benzimidazole-2-butanoic acid, 5-[(2-hydroxyethyl)amino]-1-methyl- 956344-27-7 C14H19N3O3
Iohexol ImpuritiesD Iohexol ImpuritiesD
ethyl (Z)-3-(4-((1H-imidazol-1-yl)methyl)phenyl)acrylate ethyl (Z)-3-(4-((1H-imidazol-1-yl)methyl)phenyl)acrylate
2-Propanol, 1,1'-[methylenebis(4,1-phenyleneoxy)]bis[3-[(1-methylethyl)amino]- 2-Propanol, 1,1'-[methylenebis(4,1-phenyleneoxy)]bis[3-[(1-methylethyl)amino]- 1225195-70-9 C25H38N2O4
Telmisartan impurities1039 Telmisartan impurities1039 2031272-32-7 C47H40N4O4
(4R,5S,6S)-3-[[(3S,5S)-1-[(4-Aminophenyl)methyl]-5-[[(3-carboxyphenyl)amino]carbonyl]-3-pyrrolidinyl]thio]-6-[(1R)-1-hydroxyethyl]-4-methyl-7-oxo-1-Azabicyclo[3.2.0]hept-2-ene-2-carboxylic Acid Sodium Salt (4R,5S,6S)-3-[[(3S,5S)-1-[(4-Aminophenyl)methyl]-5-[[(3-carboxyphenyl)amino]carbonyl]-3-pyrrolidinyl]thio]-6-[(1R)-1-hydroxyethyl]-4-methyl-7-oxo-1-Azabicyclo[3.2.0]hept-2-ene-2-carboxylic Acid Sodium Salt 866186-66-5 C29H33N4NaO7S
(R)-cis-5ξ-Methyl Atracurium Dibesylate (R)-cis-5ξ-Methyl Atracurium Dibesylate 1193104-82-3 C60H79N2O15S+
2-(((Z)-(1-(2-Aminothiazol-4-yl)-2-(((2R,3R)-2-methyl-4-oxo-1-sulfoazetidin-3-yl)amino)-2-oxoethylidene)amino)oxy)-2-methylpropanoic Acid 2-(((Z)-(1-(2-Aminothiazol-4-yl)-2-(((2R,3R)-2-methyl-4-oxo-1-sulfoazetidin-3-yl)amino)-2-oxoethylidene)amino)oxy)-2-methylpropanoic Acid C13H17N5O8S2
7-[4-[2-[[[4-(3-Carboxy-6-fluoro-1-methyl-4-oxo-1H,4H-[1,3]thiazeto[3,2-a]quinolin-7-yl)-1-piperazinyl]carbonyl]oxy]-3-oxobutyl]-1-piperazinyl]-6-fluoro-1-methyl-4-oxo-1H,4H-[1,3]thiazeto[3,2-a]quinoline-3-carboxylic acid 7-[4-[2-[[[4-(3-Carboxy-6-fluoro-1-methyl-4-oxo-1H,4H-[1,3]thiazeto[3,2-a]quinolin-7-yl)-1-piperazinyl]carbonyl]oxy]-3-oxobutyl]-1-piperazinyl]-6-fluoro-1-methyl-4-oxo-1H,4H-[1,3]thiazeto[3,2-a]quinoline-3-carboxylic acid 156834-58-1 C37H36F2N6O9S2
(6R,7S)-7-ACCA (6R,7S)-7-ACCA 108260-07-7 C7H7ClN2O3S
Enrofloxacin Impurity 1 Enrofloxacin Impurity 1 1128234-60-5 C19H22ClN3O3
Peramivir Impurity 20 Peramivir Impurity 20
Ambroxol Impurity 33 Ambroxol Impurity 33 199472-91-8 C13H20N2O
Bilastine Impurity 12 Bilastine Impurity 12 1638785-18-8 C30H42N4O3
2-Demethoxy-2-chloro Urapidil HCl 2-Demethoxy-2-chloro Urapidil HCl
Isavuconazole Impurity 43 Isavuconazole Impurity 43
Elagolix Impurity 41 Elagolix Impurity 41
Ethyl (2E)-3-[4-(Dibromomethyl)phenyl]prop-2-enoate Ethyl (2E)-3-[4-(Dibromomethyl)phenyl]prop-2-enoate
8-chloro-11-(1-((5-methylpyridin-3-yl)methyl)-1,2,3,6-tetrahydropyridin-4-yl)-6,11-dihydro-5H-benzo[5,6]cyclohepta[1,2-b]pyridine 8-chloro-11-(1-((5-methylpyridin-3-yl)methyl)-1,2,3,6-tetrahydropyridin-4-yl)-6,11-dihydro-5H-benzo[5,6]cyclohepta[1,2-b]pyridine
	Bumetanide Impurity 18 Bumetanide Impurity 18
LEVETIRACETAM-D6 LEVETIRACETAM-D6 1133229-30-7 C8H14N2O2
Bisoprolol Amlodipine Addition Impurity Bisoprolol Amlodipine Addition Impurity
Bisoprolol Impurity 46 Bisoprolol Impurity 46
Bisoprolol Impurity 37 Bisoprolol Impurity 37
6-Methyl-2,4-pteridinediamine 6-Methyl-2,4-pteridinediamine 708-74-7 C7H8N6
Docetaxel Impurity N Docetaxel Impurity N
Tegoprazan Impurity 14 Tegoprazan Impurity 14
Nirmatrelvir Impurity 7 Nirmatrelvir Impurity 7
4(1H)-Pyridinone, 2-(hydroxymethyl)-3,5-dimethyl- (9CI) 4(1H)-Pyridinone, 2-(hydroxymethyl)-3,5-dimethyl- (9CI) 220757-73-3 C8H11NO2
Rocuronium Bromide Impurity 19 、21、22 Rocuronium Bromide Impurity 19 、21、22
Flucloxacillin impurity D Flucloxacillin impurity D
Ritonavir EP Impurity STU Ritonavir EP Impurity STU
Letermovir Impurity 1 Letermovir Impurity 1
Roxadustat Impurity 16 Roxadustat Impurity 16
Perospirone Impurity 19 Perospirone Impurity 19
Dolutegravir Impurity 14(Sodium Salt) Dolutegravir Impurity 14(Sodium Salt)
Fondaparinux sodium impurity 5 Fondaparinux sodium impurity 5
Fondaparinux sodium impurity 20 Fondaparinux sodium impurity 20
Piperacillin  Impurity R Piperacillin Impurity R
Lasmiditan Impurity 6 Lasmiditan Impurity 6
1-methylpyrrolidin-3-yl 2-(4-chlorophenyl)-2-cyclopentyl- 2-hydroxyacetate hydrochloride 1-methylpyrrolidin-3-yl 2-(4-chlorophenyl)-2-cyclopentyl- 2-hydroxyacetate hydrochloride
Lasmiditan Impurity 8 Lasmiditan Impurity 8
Ethacridine Impurity 10 Ethacridine Impurity 10 20304-71-6 C21H16N2O4
(S)-N-(1-Azabicyclo[2.2.2]oct-3-yl)-5,6,7,8-tetrahydro-1-naphthalenecarboxamide (S)-N-(1-Azabicyclo[2.2.2]oct-3-yl)-5,6,7,8-tetrahydro-1-naphthalenecarboxamide 135729-78-1 C18H24N2O
2-(2-(4-chlorobenzoyl)phenoxy)-2-methylpropanoic acid 2-(2-(4-chlorobenzoyl)phenoxy)-2-methylpropanoic acid
Olodaterol Impurity 31 Olodaterol Impurity 31
(S)-N-[(2S,4S,5S)-5-Amino-4-hydroxy-1,6-diphenylhexan-2-yl]-3-methyl-2-(2-oxotetrahydropyrimidin-1(2H)-yl)butanamide (S)-N-[(2S,4S,5S)-5-Amino-4-hydroxy-1,6-diphenylhexan-2-yl]-3-methyl-2-(2-oxotetrahydropyrimidin-1(2H)-yl)butanamide 192726-05-9 C27H38N4O3
2-Hydrazinoadenosine 2-Hydrazinoadenosine 15763-11-8 C10H15N7O4
N-Desmethyl Clarithromycin N-Desmethyl Clarithromycin 101666-68-6 C37H67NO13
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