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Keywords: 18162-48-6 , 872-50-4 , Methylene Chloride , naphthalene , THF , Titanium Dioxide

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Pharmaceutical Impurity Reference Standards

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Structure Chemical Name CAS MF
Russupteridine IV Russupteridine IV 2535-20-8 C13H18N4O6
2-[(1-Benzylpiperidin-4-yl)hydroxyMethyl]-5,6-diMethoxyindan-1-one 2-[(1-Benzylpiperidin-4-yl)hydroxyMethyl]-5,6-diMethoxyindan-1-one 197010-20-1 C24H29NO4
5,6-trans-Ergocalciferol 5,6-trans-Ergocalciferol 51744-66-2 C28H44O
(5R)-ethyl 5-((1R,3aS,7aR)-4-((E)-2-((3S,5R)-3,5-bis(tert-butyldiMethylsilyloxy)-2-Methylenecyclohexylidene)ethyl)-7a-Methyloctahydro-1H-inden-1-yl)hexanoate (5R)-ethyl 5-((1R,3aS,7aR)-4-((E)-2-((3S,5R)-3,5-bis(tert-butyldiMethylsilyloxy)-2-Methylenecyclohexylidene)ethyl)-7a-Methyloctahydro-1H-inden-1-yl)hexanoate 169900-32-7 C39H70O4Si2
2-isonicotinoyl-5,6-diMethoxy-2,3-dihydro-1H-inden-1-one 2-isonicotinoyl-5,6-diMethoxy-2,3-dihydro-1H-inden-1-one 923571-15-7 C17H15NO4
4-(2-nitrophenyl)Morpholin-3-one 4-(2-nitrophenyl)Morpholin-3-one 845729-41-1 C10H10N2O4
Irbesartan IMpurity E Irbesartan IMpurity E C25H28N6O
LeflunoMide EP IMpurity G LeflunoMide EP IMpurity G 724429-16-7 C12H12N2O2
Telmisartan impurity C Telmisartan impurity C
Itraconazole iMpurity E Itraconazole iMpurity E
Edoxaban Isomer (RRR) Edoxaban Isomer (RRR) 1255529-24-8 C24H30ClN7O4S
1-NaphthaleneacetaMide, 1,2,3,4-tetrahydro-7-Methoxy- 1-NaphthaleneacetaMide, 1,2,3,4-tetrahydro-7-Methoxy- 92041-01-5 C13H17NO2
DO2A DO2A 112193-75-6 C12H24N4O4
7-ethyl-5H-chroMeno[2,3-b]pyridin-5-one 7-ethyl-5H-chroMeno[2,3-b]pyridin-5-one 53944-31-3 C14H11NO2
2-Methyl-10H-thieno[2,3-b][1,5]benzodiazepin-4-aMine 2-Methyl-10H-thieno[2,3-b][1,5]benzodiazepin-4-aMine 612503-08-9 C12H11N3S
IMp. A (EP): 8-Chloro-5,10-dihydro-11H-dibenzo[b,e][1,4]diazepin-11-one IMp. A (EP): 8-Chloro-5,10-dihydro-11H-dibenzo[b,e][1,4]diazepin-11-one
IMp. C (EP): 8-Chloro-11-(piperazin-1-yl)-5H- dibenzo[b,e][1,4]diazepine IMp. C (EP): 8-Chloro-11-(piperazin-1-yl)-5H- dibenzo[b,e][1,4]diazepine
21-Dehydro-16α-hydroxy Prednisolone 21-Dehydro-16α-hydroxy Prednisolone 1188271-73-9 C21H26O6
(6α,11β)-11,20-Dihydroxy-6-Methyl-3-oxopregna-1,4,17(20)-trien-21-al (6α,11β)-11,20-Dihydroxy-6-Methyl-3-oxopregna-1,4,17(20)-trien-21-al 1338549-02-2 C22H28O4
(R)-(+)-(3-CHLORO-2-HYDROXYPROPYL)TRIMETHYLAMMONIUM CHLORIDE (R)-(+)-(3-CHLORO-2-HYDROXYPROPYL)TRIMETHYLAMMONIUM CHLORIDE 117604-42-9 C6H15Cl2NO
REICHSTEIN'S SUBSTANCE S 21-ACETATE REICHSTEIN'S SUBSTANCE S 21-ACETATE 640-87-9 C23H32O5
N,N'-(OXYDI-4,1-PHENYLENE)BISACETAMIDE N,N'-(OXYDI-4,1-PHENYLENE)BISACETAMIDE 3070-86-8 C16H16N2O3
3-(2-hydroxyethyl) 5-methyl 2,6-dimethyl-4-(3-nitrophenyl)-1,4-dihydropyridine-3,5-dicarboxylate 3-(2-hydroxyethyl) 5-methyl 2,6-dimethyl-4-(3-nitrophenyl)-1,4-dihydropyridine-3,5-dicarboxylate 85677-95-8 C18H20N2O7
3-isobutylisobenzofuran-1(3H)-one 3-isobutylisobenzofuran-1(3H)-one 199736-94-2 C12H14O2
isopropyl(4,6-diamino-2-(1-(2-fluorobenzyl)-1H-pyrazolo[3,4-b] pyridin-3-yl)pyrimidin-5-yl)(methyl)carbamate isopropyl(4,6-diamino-2-(1-(2-fluorobenzyl)-1H-pyrazolo[3,4-b] pyridin-3-yl)pyrimidin-5-yl)(methyl)carbamate 625115-54-0 C22H23FN8O2
Malvidin 3-O-glucoside Malvidin 3-O-glucoside 18470-06-9 C23H25O12+
(S)-Olodaterol (S)-Olodaterol 868049-50-7 C21H26N2O5
5,6-DIHYDRO-3-METHYLAMINO-2H-1,4-THIAZIN-2-ONE OXIME 5,6-DIHYDRO-3-METHYLAMINO-2H-1,4-THIAZIN-2-ONE OXIME 148639-72-9 C5H9N3OS
M-ISOBUTYL IBUPROFEN M-ISOBUTYL IBUPROFEN 66622-47-7 C13H18O2
1,3-BIS(METHYLTHIO)-2-PROPANOL 1,3-BIS(METHYLTHIO)-2-PROPANOL 31805-83-1 C5H12OS2
4-ISOTHIOCYANATO-4'-NITRODIPHENYL ETHER 4-ISOTHIOCYANATO-4'-NITRODIPHENYL ETHER 19881-18-6 C13H8N2O3S
(R)-N-Glycidylphthalimide (R)-N-Glycidylphthalimide 181140-34-1 C11H9NO3
6-chloro-N-((1R,2S)-2-(3,4-difluorophenyl)cyclopropyl)-5- nitro-2-(propylthio)pyrimidin-4-amine 6-chloro-N-((1R,2S)-2-(3,4-difluorophenyl)cyclopropyl)-5- nitro-2-(propylthio)pyrimidin-4-amine 1427523-93-0 C16H15ClF2N4O2S
Bendamustine Impurity 15 Bendamustine Impurity 15
Bendamustine Related Impurity 10 Bendamustine Related Impurity 10
Bortezomib Impurity 16 Bortezomib Impurity 16
Captopril Related Compound 8 Captopril Related Compound 8 112243-88-6 C9H15NO3S
Edoxaban Impurity 25 (1R,2S,4R) Oxalate Edoxaban Impurity 25 (1R,2S,4R) Oxalate
Ezetimibe Impurity 35 Ezetimibe Impurity 35 1650568-82-3 C39H46F2N2O5Si2
Fosaprepitant Impurity 8 Fosaprepitant Impurity 8
Linagliptin Impurity 28 Linagliptin Impurity 28 2074688-84-7 C22H23N7O3
Pantoprazole Impurity 3 Pantoprazole Impurity 3
Ticagrelor Related Compound 58 Ticagrelor Related Compound 58
Vildagliptin Impurity 9 Vildagliptin Impurity 9
Cefathiamidine Impurity 5 Cefathiamidine Impurity 5 40818-86-8 C10H11ClN2O4S
methyl 4-hydroxy-3,5-diisopropylbenzoic acid methyl 4-hydroxy-3,5-diisopropylbenzoic acid C14H20O3
Apixaban Impurity J Apixaban Impurity J
Avibactam Impurity C Avibactam Impurity C
Brexpiprazole Impurity M Brexpiprazole Impurity M
Cefaclor Impurity 5 Cefaclor Impurity 5
Linagliptin Impurity 39 Linagliptin Impurity 39
Peramivir Impurity 5 Peramivir Impurity 5
Pidotimod Impurity O Pidotimod Impurity O
Pramipexole EP Impurity C Pramipexole EP Impurity C
Imiquimod Impurity 5 Imiquimod Impurity 5 853793-02-9 C15H18N4
9-(1,3-diacetate-2-propoxymethyl)guanine 9-(1,3-diacetate-2-propoxymethyl)guanine 86357-19-9 C13H17N5O6
Cefadroxil Impurity 6 Cefadroxil Impurity 6 2378158-45-1 C32H32N6O9S2
Loratadine Impurity 9 Loratadine Impurity 9 125743-81-9 C22H23ClN2O2
Metronidazole Impurity 1 Metronidazole Impurity 1
Parecoxib Impurity 16 Parecoxib Impurity 16 2235371-89-6 C19H18N2O4S
Rosuvastatin Impurity 54 Rosuvastatin Impurity 54
Vonoprazan Fumarate Impurity 6 Vonoprazan Fumarate Impurity 6 2250243-23-1 C33H27F2N5O4S2
3-((3aS,4R,6S,6aR)-6-(2-hydroxyethoxy)-2,2-dimethyltetrahydro- 4H-cyclopenta[d][1,3]dioxol-4-yl)-5-(propylthio)-3H-[1,2,3] triazolo[4,5-d]pyrimidin-7-ol 3-((3aS,4R,6S,6aR)-6-(2-hydroxyethoxy)-2,2-dimethyltetrahydro- 4H-cyclopenta[d][1,3]dioxol-4-yl)-5-(propylthio)-3H-[1,2,3] triazolo[4,5-d]pyrimidin-7-ol 1456538-51-4 C17H25N5O5S
Esomeprazole Impurity 24 Esomeprazole Impurity 24
Prasugrel Impurity 15 Prasugrel Impurity 15
Pregabalin Impurity 18 Pregabalin Impurity 18 1621171-19-4 C9H15NO2
Pregabalin Impurity 23 Pregabalin Impurity 23
Butylphthalide impurity Butylphthalide impurity 16692-58-3 C12H14O2
ethyl 2,5-dihydroxybenzenesulfonate ethyl 2,5-dihydroxybenzenesulfonate C8H10O5S
5-ALLYLIDENE-10,11-DIHYDRO-5H-DIBENZO[A,D]CYCLOHEPTENE 5-ALLYLIDENE-10,11-DIHYDRO-5H-DIBENZO[A,D]CYCLOHEPTENE 24755-73-5 C18H16
Nintedanib Impurity 27 Nintedanib Impurity 27
ethyl 2-(2-formyl-3-hydroxyphenyl)-4-methylthiazole-5- carboxylate ethyl 2-(2-formyl-3-hydroxyphenyl)-4-methylthiazole-5- carboxylate C14H13NO4S
LUMAT-004 LUMAT-004 313544-31-9 C16H17N3O3
Varenicline Impurity 3 Varenicline Impurity 3 1333145-89-3 C14H15N3
Econazole Related Compound C (15 mg) (1-(4-Chlorobenzyl)-3-[(2RS)-2-[(4-chlorobenzyl)oxy]-2-(2,4-dichlorophenyl)ethyl]imidazolium chloride) Econazole Related Compound C (15 mg) (1-(4-Chlorobenzyl)-3-[(2RS)-2-[(4-chlorobenzyl)oxy]-2-(2,4-dichlorophenyl)ethyl]imidazolium chloride) 57265-33-5
Amlodipine Impurity 22 (Z-Isomer) Amlodipine Impurity 22 (Z-Isomer) C26H31ClN2O8S
Amlodipine Impurity 28 Amlodipine Impurity 28 79781-21-8 C18H20ClNO5
Axitinib Impurity 16 Axitinib Impurity 16
Axitinib Impurity 22 Axitinib Impurity 22
Imidazo[5,1-f][1,2,4]triazin-4(1H)-one, 2-[2-ethoxy-5-[(4-ethyl-4-oxido-1-piperazinyl)sulfonyl]phenyl]-5-methyl-7-propyl- Imidazo[5,1-f][1,2,4]triazin-4(1H)-one, 2-[2-ethoxy-5-[(4-ethyl-4-oxido-1-piperazinyl)sulfonyl]phenyl]-5-methyl-7-propyl- 448184-48-3 C23H32N6O5S
Dolutegravir 4-Desfluoro Impurity Dolutegravir 4-Desfluoro Impurity 1863916-87-3 C20H20FN3O5
Tetrabenazine Dehydro Impurity Tetrabenazine Dehydro Impurity 100322-43-8 C19H25NO3
Cefotiam Impurity 22 Cefotiam Impurity 22 1628441-07-5 C13H14N4O5S2
Dezocine Impurity 2 Dezocine Impurity 2 100667-17-2 C16H21NO
loteprednol Impurity 7 loteprednol Impurity 7 82034-20-6 C24H33ClO7
Sitagliptin Impurity 28 Sitagliptin Impurity 28 898543-70-9 C32H25F12N9O2
Vilanterol Impurity 3 Triphenylacetate Vilanterol Impurity 3 Triphenylacetate 503070-62-0 C23H31Cl2NO5
Empagliflozin Impurity 33 Empagliflozin Impurity 33
Sugammadex Impurity 21 Sugammadex Impurity 21 2412952-93-1 C72H113NaO48S8
4-((1,4,8,11-tetraazacyclotetradecan-1-yl)methyl)benzaldehyde trihydrochloride 4-((1,4,8,11-tetraazacyclotetradecan-1-yl)methyl)benzaldehyde trihydrochloride 1254176-45-8 C18H30N4O
Remifentanil Impurity 1 (RTF-02) Remifentanil Impurity 1 (RTF-02) 938184-94-2 C16H21N3O2
methyl (3aS,4R,6S,6aR)-4-((tert-butoxycarbonyl)amino)-3-(pentan-3-yl)-3a,5,6,6a-tetrahydro-4H-cyclopenta[d]isoxazole-6-carboxylate methyl (3aS,4R,6S,6aR)-4-((tert-butoxycarbonyl)amino)-3-(pentan-3-yl)-3a,5,6,6a-tetrahydro-4H-cyclopenta[d]isoxazole-6-carboxylate 383910-25-6 C18H30N2O5
sodium (((((R)-1-(6-amino-9H-purin-9-yl)propan-2-yl)oxy) methyl)oxidophosphoryl)-L-alaninate sodium (((((R)-1-(6-amino-9H-purin-9-yl)propan-2-yl)oxy) methyl)oxidophosphoryl)-L-alaninate 382140-24-1 C12H19N6O5P
N-Des-tetrahydrofuran N-(6,7-Dimethoxy-4,4a-dihydroquinazolin-4-amine) Alfuzosin N-Des-tetrahydrofuran N-(6,7-Dimethoxy-4,4a-dihydroquinazolin-4-amine) Alfuzosin 928780-95-4 C24H30N8O4
Zopiclone Impurity 13 Zopiclone Impurity 13
N-METHYLISATIN N-METHYLISATIN 2058-74-4 C9H7NO2
1-bromo-3-(4-ethoxybenzyl)benzene 1-bromo-3-(4-ethoxybenzyl)benzene 898538-17-5 C15H15BrO
(2S,3R,4R,5S,6R)-2-(4-chloro-3-((4-ethoxyphenyl)(methoxy) methyl)phenyl)-6-(hydroxymethyl)tetrahydro-2H-pyran-3,4,5-triol (2S,3R,4R,5S,6R)-2-(4-chloro-3-((4-ethoxyphenyl)(methoxy) methyl)phenyl)-6-(hydroxymethyl)tetrahydro-2H-pyran-3,4,5-triol 1318794-28-3 C22H27ClO7
Brivaracetam Impurity Brivaracetam Impurity 2432911-37-8 C11H22O3
Azithromycin EP Impurity K Azithromycin EP Impurity K
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