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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
Levofloxacin Impurity 9 Levofloxacin Impurity 9 1797099-76-3 C18H20FN3O4
N-(5-Formyl-2-hydroxyphenyl)formamide N-(5-Formyl-2-hydroxyphenyl)formamide 903563-43-9 C8H7NO3
Nitrendipine Impurity 5 Nitrendipine Impurity 5
Posaconazole Impurity 32 Posaconazole Impurity 32
Posaconazole Impurity 61 Posaconazole Impurity 61
Procaterol Impurity 4 Procaterol Impurity 4 63235-39-2 C16H20N2O3
Sitagliptin Impurity 14 Sitagliptin Impurity 14 2072867-07-1 C26H23F9N6O2
SofosBuvir Impurity 31 SofosBuvir Impurity 31
sofosBuvir Impurity 37 sofosBuvir Impurity 37
SofosBuvir Impurity 53 SofosBuvir Impurity 53 1015255-46-5 C20H25FN3O9P
Sofosbuvir Impurity 60 Sofosbuvir Impurity 60
Tenofovir impurity G Tenofovir impurity G
Ticagrelor Impurity 26 Ticagrelor Impurity 26 2245167-79-5 C21H24F2N6O3S
Vildagliptin Impurity 19 Vildagliptin Impurity 19 243145-00-8 C10H16N2O2
Olopatadine Isopropyl ester Hydrochloride Olopatadine Isopropyl ester Hydrochloride 1206456-44-1 C24H29NO3
GLATIRAMER impurity GLATIRAMER impurity
Amoxicillin Impurity U Amoxicillin Impurity U C16H19N3O5S
Amoxicillin Impurity U Amoxicillin Impurity U C16H19N3O5S
5-HYDROXY LANSOPRAZOLE 5-HYDROXY LANSOPRAZOLE 131926-98-2 C16H14F3N3O3S
(3S,5R)-4-[5-([1,1'-Biphenyl]-4-ylmethyl)-3-methyl-2-oxopyrrolidin-1-yl]-4-oxobutanoic acid (3S,5R)-4-[5-([1,1'-Biphenyl]-4-ylmethyl)-3-methyl-2-oxopyrrolidin-1-yl]-4-oxobutanoic acid C22H23NO4
Oxacillin Sodium Impurity I(EP) Oxacillin Sodium Impurity I(EP)
Spectinomycin Impurity E Spectinomycin Impurity E
3-butyl-3-hydroxy-2-benzofuran-1-one 3-butyl-3-hydroxy-2-benzofuran-1-one 162050-42-2 C12H14O3
(4S,4aS,5aR,12aS)-4,7-bis(dimethylamino)-3,10,12,12a-tetrahydroxy-1,11-dioxo-1,4,4a,5,5a,6,11,12a-octahydrotetracene-2-carboxamide (minocycline) (4S,4aS,5aR,12aS)-4,7-bis(dimethylamino)-3,10,12,12a-tetrahydroxy-1,11-dioxo-1,4,4a,5,5a,6,11,12a-octahydrotetracene-2-carboxamide (minocycline)
(R)-10-(2,4,5-trifluorobenzyl)-3-(trifluoromethyl)-6,7,10,11-tetrahydro-[1,2,4]triazolo[3,4-c][1,4,7]triazecine-8,12(5H,9H)-dione (R)-10-(2,4,5-trifluorobenzyl)-3-(trifluoromethyl)-6,7,10,11-tetrahydro-[1,2,4]triazolo[3,4-c][1,4,7]triazecine-8,12(5H,9H)-dione 2088771-61-1 C16H13F6N5O2
N-((3R,4S)-1-benzyl-4-methylpiperidin-3-yl)-N-methyl-7H-pyrrolo[2,3-d]pyrimidin-4-amine N-((3R,4S)-1-benzyl-4-methylpiperidin-3-yl)-N-methyl-7H-pyrrolo[2,3-d]pyrimidin-4-amine 1092578-45-4 C20H25N5
846023-56-1 846023-56-1 846023-56-1 C26H31Cl2N5O4
Prednisone impurity D (EP) Prednisone impurity D (EP) 10184-69-7 C21H26O4
Lisinopril EP Impurity G Lisinopril EP Impurity G 1356839-89-8 C42H60N6O9
2-hexanoylbenzoic acid 2-hexanoylbenzoic acid 857538-11-5 C13H16O3
Blonanserin N-Oxide Blonanserin N-Oxide 142838-82-2 C23H30FN3O
Levofloxacin Impurity 11 Levofloxacin Impurity 11 106939-42-8 C9H9F2NO
Rabeprazole Impurity 2 Rabeprazole Impurity 2 1807988-36-8 C18H19N3O4
Tenofovir Related Compound 14 Tenofovir Related Compound 14 1244022-52-3 C8H11N5O
N-(2-methyl-5-nitrophenyl)-N-(4-(pyridin-3-yl)pyrimidin-2-yl)acetamide N-(2-methyl-5-nitrophenyl)-N-(4-(pyridin-3-yl)pyrimidin-2-yl)acetamide C18H15N5O3
N-(5-(benzyl(methyl)amino)-2-methylphenyl)-N-(4-(pyridin-3-yl)pyrimidin-2-yl)formamide N-(5-(benzyl(methyl)amino)-2-methylphenyl)-N-(4-(pyridin-3-yl)pyrimidin-2-yl)formamide C25H23N5O
1-(2-fluorobenzyl)-1H-pyrazolo[3,4-b]pyridine-3-carboxylic acid 1-(2-fluorobenzyl)-1H-pyrazolo[3,4-b]pyridine-3-carboxylic acid 956011-26-0 C14H10FN3O2
Nicorandil Impurity 4 Dinitrate Nicorandil Impurity 4 Dinitrate 1798026-96-6 C16H17N5O5
WIXOVOWSUCEDGS-UHFFFAOYSA-N WIXOVOWSUCEDGS-UHFFFAOYSA-N 1346603-05-1 C15H20O5
YXSRVOWUJUXDLJ-UHFFFAOYSA-N YXSRVOWUJUXDLJ-UHFFFAOYSA-N 1618107-97-3 C18H18FNO2S
S-2-Benzothiazolyl-2-amino-±-(methoxyimino)-4-thiazolethiolacetate S-2-Benzothiazolyl-2-amino-±-(methoxyimino)-4-thiazolethiolacetate 1684396-27-7 C13H10N4O2S3
4-[[(1,1-DIMETHYLETHOXY)CARBONYL]AMINO]-2-CYCLOPENTENE-1-CARBOXYLIC ACID METHYL ESTER 4-[[(1,1-DIMETHYLETHOXY)CARBONYL]AMINO]-2-CYCLOPENTENE-1-CARBOXYLIC ACID METHYL ESTER 168683-02-1 C12H19NO4
KNKJEUNXMFFFDU-LZHIOSKDSA-N KNKJEUNXMFFFDU-LZHIOSKDSA-N 138804-88-3 C25H34O6
MONO-DESACETYL FAMCICLOVIR MONO-DESACETYL FAMCICLOVIR 104227-88-5 C12H17N5O3
(E)-5-(2-CARBOXYVINYL)-2'-DEOXYURIDINE (E)-5-(2-CARBOXYVINYL)-2'-DEOXYURIDINE 74131-06-9 C12H14N2O7
HHUBRUYPYDODRB-UHFFFAOYSA-N HHUBRUYPYDODRB-UHFFFAOYSA-N 106860-70-2 C8H5NO5
5-Decyano 5-(Ethyl Formate) Milrinone 5-Decyano 5-(Ethyl Formate) Milrinone 80442-07-5 C14H14N2O3
25-DESACETYL RIFAMPICIN 25-DESACETYL RIFAMPICIN 16783-99-6 C41H56N4O11
ETHYL 2-CYCLOHEXYL-2-HYDROXY-PHENYLACETATE ETHYL 2-CYCLOHEXYL-2-HYDROXY-PHENYLACETATE 31197-69-0 C16H22O3
1-(4-methoxyphenyl)-2-methylpropan-2-ol 1-(4-methoxyphenyl)-2-methylpropan-2-ol 35144-39-9 C11H16O2
Apixaban Impurity 33 Apixaban Impurity 33 1686149-78-9 C21H27N3O3
1,8-bis(4-((1,4,8,11-tetraazacyclotetradecan-1-yl)methyl)benzyl)-1,4,8,11-tetraazacyclotetradecane 1,8-bis(4-((1,4,8,11-tetraazacyclotetradecan-1-yl)methyl)benzyl)-1,4,8,11-tetraazacyclotetradecane 414858-02-9 C46H84N12
butyl 3-((3R,4R)-4-methyl-3-(methyl(7H-pyrrolo[2,3-d]pyrimidin-4-yl)amino)piperidin-1-yl)-3-oxopropanoate butyl 3-((3R,4R)-4-methyl-3-(methyl(7H-pyrrolo[2,3-d]pyrimidin-4-yl)amino)piperidin-1-yl)-3-oxopropanoate 2227199-31-5 C20H29N5O3
ethyl 2-((E)-5-((E)-2-methyl-3-phenylallylidene)-4-oxo-2-thioxothiazolidin-3-yl)acetate ethyl 2-((E)-5-((E)-2-methyl-3-phenylallylidene)-4-oxo-2-thioxothiazolidin-3-yl)acetate 682775-71-9 C17H17NO3S2
Ethyl (2R,4S)-4-([1,1'-biphenyl]-4-ylmethyl)-4-[4-(propan-2-yloxy)-4-oxobutanamido]-2-methylbutanoate Ethyl (2R,4S)-4-([1,1'-biphenyl]-4-ylmethyl)-4-[4-(propan-2-yloxy)-4-oxobutanamido]-2-methylbutanoate C27H35NO5
Ticagrelor Impurity N Ticagrelor Impurity N 1643378-47-5 C23H29FN6O4S
carbamic acid, n-[(1r,2r,5s)-5-[(dimethylamino)carbonyl]-2-hydroxycyclohexyl]-, 1,1-dimethylethyl ester carbamic acid, n-[(1r,2r,5s)-5-[(dimethylamino)carbonyl]-2-hydroxycyclohexyl]-, 1,1-dimethylethyl ester 929693-30-1 C14H26N2O4
Valaciclovir iMpurity Valaciclovir iMpurity
Erlotinib hydrochloride Impurity C Erlotinib hydrochloride Impurity C
Linagliptin Impurity B Linagliptin Impurity B
Parecoxib Impurity A Parecoxib Impurity A
Parecoxib Impurity F Parecoxib Impurity F
2-(4-Benzhydrylpiperazino)ethyl acetoacetate 2-(4-Benzhydrylpiperazino)ethyl acetoacetate 89226-49-3 C23H28N2O3
Axitinib Impurity a Axitinib Impurity a 1347304-18-0 C22H18N4O2S
Cycloocta[b]pyridine, 4-(4-fluorophenyl)-5,6,7,8,9,10-hexahydro-2-(1-piperazinyl)- Cycloocta[b]pyridine, 4-(4-fluorophenyl)-5,6,7,8,9,10-hexahydro-2-(1-piperazinyl)- 132811-84-8 C21H26FN3
Linagliptin Impurity W Linagliptin Impurity W
(R)-4-fluoro-2-((3-methyl-2,4-dioxo-6-(piperidin-3-ylamino)-3,4-dihydropyrimidin-1(2H)-yl)methyl)benzonitrile (R)-4-fluoro-2-((3-methyl-2,4-dioxo-6-(piperidin-3-ylamino)-3,4-dihydropyrimidin-1(2H)-yl)methyl)benzonitrile C18H20FN5O2
1-cyclopropyl-6-fluoro-8-methoxy-7-((4aS,7aS)-octahydro-1H-pyrrolo[3,4-b]pyridin-1-yl)-4-oxo-1,4-dihydroquinoline-3-carboxylic acid 1-cyclopropyl-6-fluoro-8-methoxy-7-((4aS,7aS)-octahydro-1H-pyrrolo[3,4-b]pyridin-1-yl)-4-oxo-1,4-dihydroquinoline-3-carboxylic acid C21H24FN3O4
ethyl 1-cyclopropyl-7-fluoro-6,8-dimethoxy-4-oxo-1,4-dihydroquinoline-3-carboxylate ethyl 1-cyclopropyl-7-fluoro-6,8-dimethoxy-4-oxo-1,4-dihydroquinoline-3-carboxylate C17H18FNO5
Dapagliflozin Impurity 1 Dapagliflozin Impurity 1
Ibrutinib Impurity 5 Ibrutinib Impurity 5
Imatinib Impurity 4 Imatinib Impurity 4 942514-62-7 C30H33N7O
Macitentan Impurity 2 Macitentan Impurity 2 2211054-90-7 C10H8Br2N4O2
(R)-2-amino-4-(2-((4-(2-((2-hydroxy-2-phenylethyl)amino)ethyl) phenyl)amino)-2-oxoethyl)thiazole 3-oxide (R)-2-amino-4-(2-((4-(2-((2-hydroxy-2-phenylethyl)amino)ethyl) phenyl)amino)-2-oxoethyl)thiazole 3-oxide 1884646-38-1 C21H24N4O3S
Nilotinib Impurity 7 Nilotinib Impurity 7 2119583-26-3 C27H20F3N7O
Regorafenib Impurity 1 Regorafenib Impurity 1
Regorafenib Impurity 6 Regorafenib Impurity 6 1187945-05-6 C20H12ClF4N3O4
Sofosbuvir Impurity 9 Sofosbuvir Impurity 9
Venlafaxine N-Oxide Impurity Venlafaxine N-Oxide Impurity 1021933-95-8 C16H25NO3
Vonoprazan Impurity 4 Vonoprazan Impurity 4
Vortioxetine Impurity 25 Vortioxetine Impurity 25 1639263-80-1 C18H22N2O2S
Cinacalcet Impurity B Cinacalcet Impurity B 66469-40-7 C19H19N
Dapagliflozin Impurity D Dapagliflozin Impurity D 2133407-75-5 C21H25ClO6
Escitalopram Impurity Escitalopram Impurity 91283-87-3 C18H14FNO3
Furosemide Imp.(EP) Furosemide Imp.(EP)
Nifuratel Impurity Nifuratel Impurity 167103-07-3 C6H5N3O4
Vinpocetine Impurity Vinpocetine Impurity 102341-40-2 C19H23N3O
2-amino-9-((1R,3S,4S)-4-hydroxy-3-(hydroxymethyl)-2-methylenecyclopentyl)-1,9-dihydro-6H-purin-6-one 2-amino-9-((1R,3S,4S)-4-hydroxy-3-(hydroxymethyl)-2-methylenecyclopentyl)-1,9-dihydro-6H-purin-6-one 1367369-81-0 C12H15N5O3
N-(3,4-dichlorophenyl)-7-methoxy-6-(3-morpholinopropoxy)quinazolin-4-amine N-(3,4-dichlorophenyl)-7-methoxy-6-(3-morpholinopropoxy)quinazolin-4-amine 2089650-13-3 C22H24Cl2N4O3
Moxifloxacin Impurity 8 Moxifloxacin Impurity 8
(3R,5S)-7-(2-(4-fluorophenyl)-5-isopropyl-3-phenyl-4-(phenylcarbamoyl)-1H-pyrrol-1-yl)-3,5-dihydroxyheptanoic acid (3R,5S)-7-(2-(4-fluorophenyl)-5-isopropyl-3-phenyl-4-(phenylcarbamoyl)-1H-pyrrol-1-yl)-3,5-dihydroxyheptanoic acid C33H35FN2O5
Olaparib Imp.2 Olaparib Imp.2
Ciprofloxacin impurity I Ciprofloxacin impurity I C17H18FN3O3
5-(4'-((2-butyl-4-chloro-5-(isopropoxymethyl)-1H-imidazol-1-yl)methyl)-[1,1'-biphenyl]-2-yl)-1H-tetrazole 5-(4'-((2-butyl-4-chloro-5-(isopropoxymethyl)-1H-imidazol-1-yl)methyl)-[1,1'-biphenyl]-2-yl)-1H-tetrazole 1332713-64-0 C25H29ClN6O
Afatinib Impurity L (Afatinib N-Oxide) Afatinib Impurity L (Afatinib N-Oxide)
Afatinib Impurity L (Afatinib N-Oxide) Afatinib Impurity L (Afatinib N-Oxide)
Mirabegron Deshydroxy Mirabegron Deshydroxy 1581284-82-3 C21H24N4OS
4-Thiazoleacetyl chloride, 2-amino-, monohydrochloride 4-Thiazoleacetyl chloride, 2-amino-, monohydrochloride 66313-72-2 C5H6Cl2N2OS
1,2-bis(bromomethyl)-4,5-dimethoxybenzene 1,2-bis(bromomethyl)-4,5-dimethoxybenzene 26726-81-8 C10H12Br2O2
Alvimopan Impurity 2 Alvimopan Impurity 2
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