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Pharmaceutical Impurity Reference Standards

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Structure Chemical Name CAS MF
6-HYDROXYLAMINOURACIL 6-HYDROXYLAMINOURACIL 20555-88-8 C4H5N3O2
8-Chloro-5,6-dihydro-11H-benzo[5,6]cyclohepta[1,2-b]pyridin-11-one 8-Chloro-5,6-dihydro-11H-benzo[5,6]cyclohepta[1,2-b]pyridin-11-one 31251-41-9 C14H10ClNO
(R)-Ornidazole (R)-Ornidazole 166734-80-1 C7H10ClN3O3
Bendamustine Related Impurity 22 Bendamustine Related Impurity 22
Bendamustine Related Impurity 9 Bendamustine Related Impurity 9
Edoxaban Impurity 20 (1R,2R,4S) Edoxaban Impurity 20 (1R,2R,4S) 1928729-31-0 C16H29N3O7
Edoxaban Impurity 40 Edoxaban Impurity 40 2081883-52-3 C14H27N3O3
Everolimus Impurity 2 Everolimus Impurity 2
Levosimendan Impurity 2 (Mixture ofZandEIsomers) Levosimendan Impurity 2 (Mixture ofZandEIsomers)
N-(2,3-Dichloro-phenyl)-N'-[2-(2,3-dichloro-phenylamino)-ethyl]-ethane-1,2-diamine N-(2,3-Dichloro-phenyl)-N'-[2-(2,3-dichloro-phenylamino)-ethyl]-ethane-1,2-diamine C16H17Cl4N3
N-(2,3-Dichloro-phenyl)-N'-[2-(2,3-dichloro-phenylamino)-ethyl]-ethane-1,2-diamine N-(2,3-Dichloro-phenyl)-N'-[2-(2,3-dichloro-phenylamino)-ethyl]-ethane-1,2-diamine C16H17Cl4N3
Solifenacin Related Compound 29 Solifenacin Related Compound 29 861998-77-8 C23H26N2O3
Ticagrelor Impurity 31 Ticagrelor Impurity 31
Ticagrelor Related Compound 46 Ticagrelor Related Compound 46 2205903-73-5 C28H42ClN9O8S2
Ticagrelor Related Compound 71 Ticagrelor Related Compound 71 1548397-10-9 C7H8ClN3O3S
Ticagrelor Related Compound 76 Ticagrelor Related Compound 76
Vonoprazan Impurity 25 Vonoprazan Impurity 25
1-(3,4-Dimethoxyphenyl)-2-(methylsulfonyl)ethan-1-amine 1-(3,4-Dimethoxyphenyl)-2-(methylsulfonyl)ethan-1-amine 1255909-25-1 C11H17NO4S
C-Desmethyl Metoprolol C-Desmethyl Metoprolol 109632-08-8 C14H23NO3
JZWUWLJCMMPASK-YTSMVRMISA-N JZWUWLJCMMPASK-YTSMVRMISA-N 147103-95-5 C24H24N4O7S
KXEITTOLAUJQPU-UHFFFAOYSA-N KXEITTOLAUJQPU-UHFFFAOYSA-N 1797832-43-9 C20H21N7O2S
GPZGXSFHPLUMHE-KEUNHQLVSA-N GPZGXSFHPLUMHE-KEUNHQLVSA-N 157054-84-7 C52H81NO13
IRLGOHSHDYCIAB-ZMVBZRCWSA-N IRLGOHSHDYCIAB-ZMVBZRCWSA-N 1076198-14-5 C19H23F3N2O5
AOEGVETYSHPGBP-XYIDDFOTSA-N AOEGVETYSHPGBP-XYIDDFOTSA-N 1887057-05-7 C41H55NO14
4,6-DIAMINOINDAZOLE 4,6-DIAMINOINDAZOLE 885518-52-5 C7H8N4
12-Deoxy Roxithromycin 12-Deoxy Roxithromycin 425365-65-7 C41H76N2O14
1-(1-oxidopyridin-1-ium-2-yl)-1-phenylethanol 1-(1-oxidopyridin-1-ium-2-yl)-1-phenylethanol 100393-43-9 C13H13NO2
(R)-(R)-1-methylpyrrolidin-3-yl 2-cyclopentyl-2-hydroxy-2-phenylacetate(WXC03446) (R)-(R)-1-methylpyrrolidin-3-yl 2-cyclopentyl-2-hydroxy-2-phenylacetate(WXC03446) 616866-21-8 C18H25NO3
(R)-2-((6-(3-aminopiperidin-1-yl)-3-methyl-2,4-dioxo-3,4-dihydropyrimidin-1(2H)-yl)methyl)benzoic acid (R)-2-((6-(3-aminopiperidin-1-yl)-3-methyl-2,4-dioxo-3,4-dihydropyrimidin-1(2H)-yl)methyl)benzoic acid C18H22N4O4
(R)-2-((6-(3-aminopiperidin-1-yl)-3-methyl-2,4-dioxo-3,4-dihydropyrimidin-1(2H)-yl)methyl)benzoic acid (R)-2-((6-(3-aminopiperidin-1-yl)-3-methyl-2,4-dioxo-3,4-dihydropyrimidin-1(2H)-yl)methyl)benzoic acid C18H22N4O4
6'-methyl-3-(4-(methylsulfonyl)phenyl)-[2,3'-bipyridin]-5-amine 6'-methyl-3-(4-(methylsulfonyl)phenyl)-[2,3'-bipyridin]-5-amine C18H17N3O2S
Diquafosol Impurity 4 Diquafosol Impurity 4
Tofacitinib Impurity X Tofacitinib Impurity X
3-pentylideneisobenzofuran-1(3H)-one 3-pentylideneisobenzofuran-1(3H)-one 90965-68-7 C13H14O2
Labetalol EP impurity E Labetalol EP impurity E
1-Propanol, 3-(2-methoxy-5-nitrophenoxy)- 1-Propanol, 3-(2-methoxy-5-nitrophenoxy)- 1156068-41-5 C10H13NO5
Adefovir Impurity C Adefovir Impurity C
Blonanserin Impurity M Blonanserin Impurity M
Brexpiprazole Impurity H Brexpiprazole Impurity H
Cefaclor EP Impurity H Cefaclor EP Impurity H
Flupentixol Impurity B Flupentixol Impurity B
Ipratropium Bromide Impurity J Ipratropium Bromide Impurity J C20H29Br2NO3
2-(5-Acetyl-2-ethoxyphenyl)-5-methyl-7-propyl-imidazo[5,1-f][1,2,4]triazin-4(1H)-one 2-(5-Acetyl-2-ethoxyphenyl)-5-methyl-7-propyl-imidazo[5,1-f][1,2,4]triazin-4(1H)-one 358390-43-9 C19H22N4O3
Empagliflozin Impurity 80 Empagliflozin Impurity 80
Empagliflozin Impurity 92 Empagliflozin Impurity 92
Iohexol Impurity N Iohexol Impurity N
Pitavastatin 5-Oxo Impurity Calcium Salt Pitavastatin 5-Oxo Impurity Calcium Salt 2180095-22-9 C25H24CaFNO4
1-(2-bromo-3,5-dihydroxyphenyl)ethanone 1-(2-bromo-3,5-dihydroxyphenyl)ethanone 2092614-65-6 C8H7BrO3
Lenvatinib impurity LFZZ-18 Lenvatinib impurity LFZZ-18 C11H8Cl2N2O2
Rosuvastatin Impurity 121 Rosuvastatin Impurity 121 140164-51-8 C10H18O5
Brivaracetam Impurity 38 Brivaracetam Impurity 38
Isavuconazole Impurities 04 Isavuconazole Impurities 04
Ticagrelor Impurity 119 Ticagrelor Impurity 119
Ticagrelor Impurity 118 Ticagrelor Impurity 118
D-erythro-Hexonic acid, 2,4-dideoxy-3,5-O-(1-methylethylidene)-, acetate (9CI) D-erythro-Hexonic acid, 2,4-dideoxy-3,5-O-(1-methylethylidene)-, acetate (9CI) 402508-35-4 C11H18O6
L-Alanine, 3-[(S)-(carboxymethyl)sulfinyl]- L-Alanine, 3-[(S)-(carboxymethyl)sulfinyl]- 112246-66-9 C5H9NO5S
2-Propanone, 1-[4,5-dihydro-2-(4-methyl-1-piperazinyl)-4-thioxo-3H-1,5-benzodiazepin-3-ylidene]- 2-Propanone, 1-[4,5-dihydro-2-(4-methyl-1-piperazinyl)-4-thioxo-3H-1,5-benzodiazepin-3-ylidene]- 1902955-67-2 C17H20N4OS
3(2H)-Pyridazinone, 6-[4-(ethylamino)phenyl]-4,5-dihydro-5-methyl- 3(2H)-Pyridazinone, 6-[4-(ethylamino)phenyl]-4,5-dihydro-5-methyl- 52240-42-3 C13H17N3O
Benzoic acid, 4-[[4-(aminocarbonyl)-1-piperidinyl]methyl]- Benzoic acid, 4-[[4-(aminocarbonyl)-1-piperidinyl]methyl]- 938143-02-3 C14H18N2O3
1-(4-methylbenzyl)-1,4,8,11-tetraazacyclotetradecane tetrahydrochloride 1-(4-methylbenzyl)-1,4,8,11-tetraazacyclotetradecane tetrahydrochloride
2,4-bis(1-(2,3-dimethylphenyl)ethyl)-1H-imidazole 2,4-bis(1-(2,3-dimethylphenyl)ethyl)-1H-imidazole
2-((4R,6S)-6-((2-((4R,6S)-6-(hydroxymethyl)-2,2-dimethyl-1,3-dioxan-4-yl)acetoxy)methyl)-2,2-dimethyl-1,3-dioxan-4-yl)acetic acid 2-((4R,6S)-6-((2-((4R,6S)-6-(hydroxymethyl)-2,2-dimethyl-1,3-dioxan-4-yl)acetoxy)methyl)-2,2-dimethyl-1,3-dioxan-4-yl)acetic acid
1,3-bis(4-((E)-3-methoxy-3-oxoprop-1-en-1-yl)benzyl)-1H-imidazol-3-ium bromide 1,3-bis(4-((E)-3-methoxy-3-oxoprop-1-en-1-yl)benzyl)-1H-imidazol-3-ium bromide
Crisaborole intermediate Crisaborole intermediate 1187230-70-1 C14H14BNO3
Glycine, (2R)-N-[(4-ethyl-2,3-dioxo-1-piperazinyl)carbonyl]-2-phenylglycyl-2-[(2S,4S)-4-carboxy-5,5-dimethyl-2-thiazolidinyl]-, (2R)- Glycine, (2R)-N-[(4-ethyl-2,3-dioxo-1-piperazinyl)carbonyl]-2-phenylglycyl-2-[(2S,4S)-4-carboxy-5,5-dimethyl-2-thiazolidinyl]-, (2R)- 1449784-97-7 C23H29N5O8S
6-Quinolinecarboxamide, 4-[(2-chloro-4-hydroxyphenyl)amino]-7-methoxy- 6-Quinolinecarboxamide, 4-[(2-chloro-4-hydroxyphenyl)amino]-7-methoxy- 2380197-89-5 C17H14ClN3O3
1-Pyrrolidineacetic acid, α-ethyl-2-oxo-4-propyl-, methyl ester, (4R)- 1-Pyrrolidineacetic acid, α-ethyl-2-oxo-4-propyl-, methyl ester, (4R)- 930123-52-7 C12H21NO3
Traxipide impurity Traxipide impurity
Benzeneacetic acid, 4-[2-[4-[1-(2-ethoxyethyl)-1H-benzimidazol-2-yl]-1-piperidinyl]ethyl]-α,α-dimethyl-, methyl ester Benzeneacetic acid, 4-[2-[4-[1-(2-ethoxyethyl)-1H-benzimidazol-2-yl]-1-piperidinyl]ethyl]-α,α-dimethyl-, methyl ester 1181267-38-8 C29H39N3O3
Benzenemethanol, 4-[2-(1-methylethoxy)ethoxy]- Benzenemethanol, 4-[2-(1-methylethoxy)ethoxy]- 1039828-27-7 C12H18O3
Brivaracetam Impurity 7 HCl Brivaracetam Impurity 7 HCl 357338-46-6 C13H27ClN2O3
Bisacodyl Impurity 1 Bisacodyl Impurity 1 13004-51-8 C18H15NO2
Vecuronium Bromide ImpurityACDEFGHJKL Vecuronium Bromide ImpurityACDEFGHJKL
Butanedioic acid, 2-[[2-methyl-1-(phenylmethyl)-1H-imidazol-5-yl]methylene]-, 1-ethyl ester, (2E)- Butanedioic acid, 2-[[2-methyl-1-(phenylmethyl)-1H-imidazol-5-yl]methylene]-, 1-ethyl ester, (2E)- 1640981-02-7 C18H20N2O4
INDEX NAME NOT YET ASSIGNED INDEX NAME NOT YET ASSIGNED 2452300-94-4 C21H25ClO8
1-Butanone, 1-(4-fluorophenyl)-4-[(6bS,10aS)-2,3,6b,9,10,10a-hexahydro-3-methyl-1H-pyrido[3',4':4,5]pyrrolo[1,2,3-de]quinoxalin-8(7H)-yl]- 1-Butanone, 1-(4-fluorophenyl)-4-[(6bS,10aS)-2,3,6b,9,10,10a-hexahydro-3-methyl-1H-pyrido[3',4':4,5]pyrrolo[1,2,3-de]quinoxalin-8(7H)-yl]- 1576240-15-7 C24H28FN3O
1-Pyrrolidineacetamide, α-ethyl-4-(1-methylethyl)-2-oxo-, (αS,4S)- 1-Pyrrolidineacetamide, α-ethyl-4-(1-methylethyl)-2-oxo-, (αS,4S)- 357334-83-9 C11H20N2O2
impurity 42 impurity 42
2,2'-(4,10-bis((2S,3R)-1,3,4-trihydroxybutan-2-yl)-1,4,7,10-tetraazacyclododecane-1,7-diyl)diacetic acid 2,2'-(4,10-bis((2S,3R)-1,3,4-trihydroxybutan-2-yl)-1,4,7,10-tetraazacyclododecane-1,7-diyl)diacetic acid
Loratadine Impurity 2 Loratadine Impurity 2 167891-69-2 C22H25ClN2O2
Eliglustat (1S,2S)-Isomer (Hemitartrate) Eliglustat (1S,2S)-Isomer (Hemitartrate) 1092472-70-2 C23H36N2O4
3-Azetidineacetic acid, 1-(ethylsulfonyl)-3-[4-(7H-pyrrolo[2,3-d]pyrimidin-4-yl)-1H-pyrazol-1-yl]- 3-Azetidineacetic acid, 1-(ethylsulfonyl)-3-[4-(7H-pyrrolo[2,3-d]pyrimidin-4-yl)-1H-pyrazol-1-yl]- 2271228-52-3 C16H18N6O4S
Cyclopentanecarboxylic acid, 3-[(1S)-1-amino-2-ethylbutyl]-4-[(aminoiminomethyl)amino]-2-hydroxy-, (1S,2S,3S,4R)- Cyclopentanecarboxylic acid, 3-[(1S)-1-amino-2-ethylbutyl]-4-[(aminoiminomethyl)amino]-2-hydroxy-, (1S,2S,3S,4R)- 2412376-06-6 C13H26N4O3
Peramivir Impurity 49 Peramivir Impurity 49 2758048-81-4
Peonidin-3-O-Sophoroside- 5-O-β-D-glucoside Peonidin-3-O-Sophoroside- 5-O-β-D-glucoside 81360-22-7 C34H43O21+
1-Pyrrolidinecarboxylic acid, 3,3'-dithiobis[5-[[(3-carboxyphenyl)amino]carbonyl]-, 1,1'-bis[(4-nitrophenyl)methyl] ester, (3S,3'S,5S,5'S)- 1-Pyrrolidinecarboxylic acid, 3,3'-dithiobis[5-[[(3-carboxyphenyl)amino]carbonyl]-, 1,1'-bis[(4-nitrophenyl)methyl] ester, (3S,3'S,5S,5'S)- 1401451-19-1 C40H36N6O14S2
Benzeneacetic acid, α-(hydroxymethyl)-, 9-butyl-3-oxa-9-azatricyclo[3.3.1.02,4]non-7-yl ester, [7(S)-(1α,2β,4β,5α,7β)]- (9CI) Benzeneacetic acid, α-(hydroxymethyl)-, 9-butyl-3-oxa-9-azatricyclo[3.3.1.02,4]non-7-yl ester, [7(S)-(1α,2β,4β,5α,7β)]- (9CI) 14861-14-4 C20H27NO4
Avatrombopag Impurity 32 Avatrombopag Impurity 32
Cisatracurium besylate impurity 18 Cisatracurium besylate impurity 18
Paclitaxel Impurity1 ABCDEFGHJKL Paclitaxel Impurity1 ABCDEFGHJKL
3-THIOPHENEPROPANAMINE, N,N-DIMETHYL-GAMMA-(1-NAPHTHALENYLOXY)-, ETHANEDIOATE(1:1) 3-THIOPHENEPROPANAMINE, N,N-DIMETHYL-GAMMA-(1-NAPHTHALENYLOXY)-, ETHANEDIOATE(1:1) 116817-26-6 C21H23NO5S
(2R,3S/2S,3R)-2-(2,4-Difluorophenyl)-3-(5-fluoropyrimidin-4-yl)-1-(1H-1,2,4-triazol-1-yl)butan-2-ol (2R,3S/2S,3R)-2-(2,4-Difluorophenyl)-3-(5-fluoropyrimidin-4-yl)-1-(1H-1,2,4-triazol-1-yl)butan-2-ol 182230-43-9 C16H14F3N5O
Bumetanide Impurity 8 Bumetanide Impurity 8
Benzenesulfonamide, N-(2-aminoethyl)-3-(1,4-dihydro-5-methyl-4-oxo-7-propylimidazo[5,1-f][1,2,4]triazin-2-yl)-4-ethoxy- Benzenesulfonamide, N-(2-aminoethyl)-3-(1,4-dihydro-5-methyl-4-oxo-7-propylimidazo[5,1-f][1,2,4]triazin-2-yl)-4-ethoxy- 448184-52-9 C19H26N6O4S
Avibactam Impurity 04 Avibactam Impurity 04
Latamoxef Impurity C Latamoxef Impurity C
Carbamic acid, [2-hydroxy-1-methyl-2-[3-(phenylmethoxy)phenyl]ethyl]-, phenylmethyl ester, [R-(R*,S*)]- (9CI) Carbamic acid, [2-hydroxy-1-methyl-2-[3-(phenylmethoxy)phenyl]ethyl]-, phenylmethyl ester, [R-(R*,S*)]- (9CI) 31301-86-7 C24H25NO4
9H-Purine-9-ethanol, 6-amino-β-methyl- 9H-Purine-9-ethanol, 6-amino-β-methyl- 20776-34-5 C8H11N5O
2-amino-5-[(3,4,5-trimethoxyphenyl)methyl]-1H-pyrimidin-4-one 2-amino-5-[(3,4,5-trimethoxyphenyl)methyl]-1H-pyrimidin-4-one 92440-76-1 C14H17N3O4
Edoxaban impurity ABCDEFGHJKL Edoxaban impurity ABCDEFGHJKL
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