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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
Lidocaine EP Impurity G Lidocaine EP Impurity G 42459-30-3 C13H20N2O
methyl 1,4-dihydroxy-7-phenoxyisoquinoline-3-carboxylate methyl 1,4-dihydroxy-7-phenoxyisoquinoline-3-carboxylate 1421312-32-4 C17H13NO5
1-(2,3-DIMETHYLPHENYL)PROPAN-1-OL 1-(2,3-DIMETHYLPHENYL)PROPAN-1-OL 944268-64-8 C11H16O
4-(4-chlorophenyl)-5-methyl-3-phenylisoxazole 4-(4-chlorophenyl)-5-methyl-3-phenylisoxazole 1448355-87-0 C16H12ClNO
Cefathiamidine Impurity D Cefathiamidine Impurity D
Cefazolin Impurity C (EP) Cefazolin Impurity C (EP)
Cefdinir Impurity H (CP) Cefdinir Impurity H (CP)
Cefdinir Impurity S(CP) Cefdinir Impurity S(CP)
Cefodizime oxidation Impurity 1 Cefodizime oxidation Impurity 1 111874-11-4 C20H20N6O7S4
Spectinomycin Impurity F Spectinomycin Impurity F
(7S,8R)-3-[2-(tert-butylamino)acetamido]-7-[[4-carbamoyl-2-(dimethylamino)-3,5,6-trihydroxyphenyl]methyl]-6-carboxy-5,8-dihydroxy-N,N-dimethyl-4-oxo-7,8-dihydronaphthalen-1(4H)-iminium (7S,8R)-3-[2-(tert-butylamino)acetamido]-7-[[4-carbamoyl-2-(dimethylamino)-3,5,6-trihydroxyphenyl]methyl]-6-carboxy-5,8-dihydroxy-N,N-dimethyl-4-oxo-7,8-dihydronaphthalen-1(4H)-iminium C29H38N5O10+
3-pentylisobenzofuran-1(3H)-one 3-pentylisobenzofuran-1(3H)-one 111943-62-5 C13H16O2
2-[[2-2(2-Amino-4-thiazolyl)acetyl]amino]-4-thiazoleacetic Acid 2-[[2-2(2-Amino-4-thiazolyl)acetyl]amino]-4-thiazoleacetic Acid 2036283-13-1 C10H10N4O3S2
Levofloxacin Impurity 18 Levofloxacin Impurity 18 138998-47-7 C14H13F4NO3
N-(5-amino-2-methylphenyl)-N-(4-(pyridin-3-yl)pyrimidin-2-yl)acetamide compound with methane (1:1) N-(5-amino-2-methylphenyl)-N-(4-(pyridin-3-yl)pyrimidin-2-yl)acetamide compound with methane (1:1)
N-(2-methyl-5-(methylamino)phenyl)-N-(4-(pyridin-3-yl)pyrimidin-2-yl)formamide N-(2-methyl-5-(methylamino)phenyl)-N-(4-(pyridin-3-yl)pyrimidin-2-yl)formamide C18H17N5O
methyl3-((3R,4R)-4-methyl-3-(methyl(7H-pyrrolo[2,3-d]pyrimidin -4-yl)amino)piperidin-1-yl)-3-oxopropanoate methyl3-((3R,4R)-4-methyl-3-(methyl(7H-pyrrolo[2,3-d]pyrimidin -4-yl)amino)piperidin-1-yl)-3-oxopropanoate 1616761-01-3 C17H23N5O3
Labetalol iMpurity Labetalol iMpurity 2731858-23-2
5,11-dihydro-6H-11-ethyl-4-Methyl-dipyrido[3,2-b:2',3'-e][1,4]diazepin-6-one 5,11-dihydro-6H-11-ethyl-4-Methyl-dipyrido[3,2-b:2',3'-e][1,4]diazepin-6-one 133627-17-5 C14H14N4O
(1R,3S)-1-(1,3-Benzodioxol-5-yl)-2,3,4,9-tetrahydro-1H-pyrido[3,4-b]indole-3-carboxylic Acid Methyl Ester (1R,3S)-1-(1,3-Benzodioxol-5-yl)-2,3,4,9-tetrahydro-1H-pyrido[3,4-b]indole-3-carboxylic Acid Methyl Ester 171596-44-4 C20H18N2O4
Amlodipine-d4 Amlodipine-d4 1185246-14-3 C20H25ClN2O5
Afatinib Impurity M Afatinib Impurity M
Ornidazole Impurity Ornidazole Impurity 1100750-18-2
4-(3-nitrophenyl)-3-Morpholinone 4-(3-nitrophenyl)-3-Morpholinone 845729-43-3 C10H10N2O4
ZXANKCFSGFEBQW-PFEQFJNWSA-N ZXANKCFSGFEBQW-PFEQFJNWSA-N 1258938-54-3
TWEORVZIMOFLDE-MXTNKPTQSA-N TWEORVZIMOFLDE-MXTNKPTQSA-N 1706671-50-2 C25H31N5O9S
WGEFOIHAXGTXJE-RTMVWDMESA-N WGEFOIHAXGTXJE-RTMVWDMESA-N 1373171-12-0 C48H61NO14
ZIMIAPVHHUISPY-CLFYSBASSA-N ZIMIAPVHHUISPY-CLFYSBASSA-N 866954-86-1 C15H15F3O5
ICOFQCJKJOISKD-HSZRJFAPSA-N ICOFQCJKJOISKD-HSZRJFAPSA-N 1435768-96-9 C26H35NO3
Moxidectin Moxidectin 119718-45-5 C37H53NO8
GDZISNMJFAJFMR-BEQCQUFHSA-M GDZISNMJFAJFMR-BEQCQUFHSA-M 2024603-92-5 C58H74N2O15S
GJXNGCFWGJQETE-UHFFFAOYSA-N GJXNGCFWGJQETE-UHFFFAOYSA-N 1796891-27-4 C29H34N6O4
ethyl N-[(2,5-dichlorophenyl)carbonyl]glycinate ethyl N-[(2,5-dichlorophenyl)carbonyl]glycinate 328283-61-0 C11H11Cl2NO3
Irbesartan Impurity 4 Irbesartan Impurity 4 945540-26-1 C21H20N6O
BAUCJPGULMYPTE-UHFFFAOYSA-N BAUCJPGULMYPTE-UHFFFAOYSA-N 2097683-67-3 C24H29NO4
Entecavir Impurity 6 Entecavir Impurity 6 1354695-82-1 C26H27N5O3
Bis(L-Valine) Ester Ganciclovir TFA Salt Bis(L-Valine) Ester Ganciclovir TFA Salt 130914-71-5 C19H31N7O6
6-Chloro-6-defluoro Ciprofloxacin 6-Chloro-6-defluoro Ciprofloxacin 93106-58-2 C17H18ClN3O3
5-[(4-amino-2-carboxyphenyl)amino]-2-hydroxybenzoic acid 5-[(4-amino-2-carboxyphenyl)amino]-2-hydroxybenzoic acid 1797983-23-3 C14H12N2O5
(S)-2-(BENZYLOXY)PROPIONAL (S)-2-(BENZYLOXY)PROPIONAL 81445-44-5 C10H12O2
1-Chloro-2-[(4-ethoxyphenyl)methyl]benzene 1-Chloro-2-[(4-ethoxyphenyl)methyl]benzene 1662702-90-0 C15H15ClO
Mupirocin iMpurity F Mupirocin iMpurity F C26H44O9
Palbociclib Impurity 87 Palbociclib Impurity 87 571189-51-0 C25H31N7O2
Beclometasone Impurity U Beclometasone Impurity U
Atracurium Impurity 15 Iodide（Cisatracurium Besilate EP Impurity O Iodide） Atracurium Impurity 15 Iodide（Cisatracurium Besilate EP Impurity O Iodide） 155913-31-8 C38H49NO11S
Vortioxetine Impurity 29 Vortioxetine Impurity 29 1928741-88-1 C18H23ClN2S
Neratinib Impurity 12 Neratinib Impurity 12 544417-27-8 C33H37ClN6O3
Ceftriaxone Sodium impurity 2 Ceftriaxone Sodium impurity 2
Enrofloxacin EP Impurity E Enrofloxacin EP Impurity E 1369495-59-9 C19H22ClN3O3
147027-08-5 147027-08-5 147027-08-5 C14H24O4S
Cloxacillin EP Impurity A Cloxacillin EP Impurity A 1642629-96-6 C19H20ClN3O6S
Entacapone Impurity 7 Entacapone Impurity 7 1215039-66-9 C12H10N2O6
1,8-dibenzyl-1,4,8,11-tetraazacyclotetradecane tetrahydrochloride 1,8-dibenzyl-1,4,8,11-tetraazacyclotetradecane tetrahydrochloride 267241-20-3 C24H37ClN4
(3S,3'S,4R,4'R)-3,3'-(oxybis(methylene))bis(4-(4-fluorophenyl)-1- methylpiperidine) (3S,3'S,4R,4'R)-3,3'-(oxybis(methylene))bis(4-(4-fluorophenyl)-1- methylpiperidine) C26H34F2N2O
DexMedetoMidine IMpurity 15 DexMedetoMidine IMpurity 15
Canagliflozin Impurity 1 Canagliflozin Impurity 1
Vonoprazan Impurity 24 Vonoprazan Impurity 24
Esomeprazole Impurity Esomeprazole Impurity
Esomeprazole Impurity 27 Esomeprazole Impurity 27
Amlodipine Impurity 30 Amlodipine Impurity 30 1089674-39-4 C26H31ClN2O8S
Alogliptin Impurity 30 Alogliptin Impurity 30
Olaparib Impurity 27 Olaparib Impurity 27
Hydrocortisone Impurity 14 Hydrocortisone Impurity 14 C21H30O5
Teneligliptin Impurity 5 Teneligliptin Impurity 5
Erlotinib Hydrochloride iMpurity 54 Erlotinib Hydrochloride iMpurity 54
Aciclovir EP Impurity N Aciclovir EP Impurity N
Vonoprazan Impurity U2 Vonoprazan Impurity U2
Parecoxib SodiuM iMpurity 36 Parecoxib SodiuM iMpurity 36
phenyl (3R,4R)-3-((benzo[d][1,3]dioxol-5-yloxy)methyl)-4-(4- fluorophenyl)piperidine-1-carboxylate compound phenyl (3R,4R)-3-((benzo[d][1,3]dioxol-5-yloxy)methyl)-4-(4- fluorophenyl)piperidine-1-carboxylate compound 105812-85-9 C26H24FNO5
Apixaban Impurity A25 Apixaban Impurity A25
Trelagliptin IMpurity 32 Trelagliptin IMpurity 32
Afatinib Impurity 77 Afatinib Impurity 77 26404-20-6 C5H7ClO3
2a,3a,16a,17a-Diepoxy-17b-acetoxy-5a-androstane 2a,3a,16a,17a-Diepoxy-17b-acetoxy-5a-androstane 50588-22-2 C21H30O4
bis(6-(((3S,4R)-4-(4-fluorophenyl)piperidin-3-yl)methoxy)benzo[d][1,3]dioxol-5-yl)methane bis(6-(((3S,4R)-4-(4-fluorophenyl)piperidin-3-yl)methoxy)benzo[d][1,3]dioxol-5-yl)methane 2105932-71-4 C39H40F2N2O6
Tenofovir Impurity 60 Tenofovir Impurity 60
((3R,4S)-4-(4-fluorophenyl)-1-methylpiperidin-3-yl)methyl 4-methylbenzenesulfonate ((3R,4S)-4-(4-fluorophenyl)-1-methylpiperidin-3-yl)methyl 4-methylbenzenesulfonate 1258537-32-4 C20H24FNO3S
Mupirocin Calcium EP Impurity H Mupirocin Calcium EP Impurity H C26H44CaO9
Tricyclo[3.3.1.13,7]decane-1,3-diol, 5-amino- Tricyclo[3.3.1.13,7]decane-1,3-diol, 5-amino- 1382839-19-1 C10H17NO2
(trans)-phenyl 3-((benzo[d][1,3]dioxol-5-yloxy)methyl)-4-(4- methoxyphenyl)piperidine-1-carboxylate (trans)-phenyl 3-((benzo[d][1,3]dioxol-5-yloxy)methyl)-4-(4- methoxyphenyl)piperidine-1-carboxylate C27H27NO6
Org198786-1 Org198786-1 2412952-96-4 C71H114NNaO46S7
2-Thiazolamine, 4-(4-bromo-2-thienyl)- 2-Thiazolamine, 4-(4-bromo-2-thienyl)- 81216-89-9 C7H5BrN2S2
Elagolix Sodium impurity4 Elagolix Sodium impurity4 2248628-92-2 C19H21NO4S
Tadalafil Impurity 45 Tadalafil Impurity 45
(R)-3-((R)-3-(naphthalen-1-yloxy)-1-phenylpropoxy)-1-phenylpropan-1-ol (R)-3-((R)-3-(naphthalen-1-yloxy)-1-phenylpropoxy)-1-phenylpropan-1-ol C28H28O3
(trans)-4-((2-amino-4,5-dibromobenzyl)amino)cyclohexanol (trans)-4-((2-amino-4,5-dibromobenzyl)amino)cyclohexanol C13H18Br2N2O
Edaravone Impurity Edaravone Impurity
1-Butanesulfonic acid, 4-hydroxy-, methyl ester 1-Butanesulfonic acid, 4-hydroxy-, methyl ester 343928-18-7 C5H12O4S
Fesoterodine Impurity 17 Fesoterodine Impurity 17
1-(4-((1,4,8,11-tetraazacyclotetradecan-1-yl)methyl)benzyl)-1,4,8,11-tetraazacyclotetradecane 1-oxide 1-(4-((1,4,8,11-tetraazacyclotetradecan-1-yl)methyl)benzyl)-1,4,8,11-tetraazacyclotetradecane 1-oxide C28H54N8O
Cabozantinib impurity DX2 Cabozantinib impurity DX2 1628530-38-0 C28H24FN3O6
Selegiline Impurity (224Da) Selegiline Impurity (224Da)
Oxybutynin Impurity(MW 481Da) Oxybutynin Impurity(MW 481Da)
Vitamin K1 hydroxylated Impurity Vitamin K1 hydroxylated Impurity
2,2'-(4,10-bis((trans)-1,3,4-trihydroxybutan-2-yl)-1,4,7,10-tetraazacyclododecane-1,7-diyl)diacetic acid 4HCl 2,2'-(4,10-bis((trans)-1,3,4-trihydroxybutan-2-yl)-1,4,7,10-tetraazacyclododecane-1,7-diyl)diacetic acid 4HCl
Cefdinir CP Impurity F Cefdinir CP Impurity F
Ceftazidime Oxide Impurity 1 Ceftazidime Oxide Impurity 1
Nifuratel Impurity 21 Nifuratel Impurity 21
Ornidazole Impurity 15 Ornidazole Impurity 15 105687-87-4 C7H9ClN4O5
2-(Dimethylamino)ethyl 4-methylbenzenesulfonate 2-(Dimethylamino)ethyl 4-methylbenzenesulfonate 123091-15-6 C11H17NO3S
Vildagliptin I Impurity Vildagliptin I Impurity 1811569-16-0 C7H9IN2O
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