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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
Fluconazole IMpurity-H Fluconazole IMpurity-H
Retigabine Dihydrochloride Impurity Retigabine Dihydrochloride Impurity 1432063-93-8 C16H19ClFN3O2
Adrenaline IMpurity F Adrenaline IMpurity F 78995-75-2 C9H13NO5S
Anastrozole IMpurity (alfa1 , alfa1, alfa3, alfa3-TetraMethyl-5-(1H-1,2,4-triazol-1-ylMethyl)-1,3-Benzenediacetic acid) Anastrozole IMpurity (alfa1 , alfa1, alfa3, alfa3-TetraMethyl-5-(1H-1,2,4-triazol-1-ylMethyl)-1,3-Benzenediacetic acid) 1338800-81-9 C17H21N3O4
AtracuriuM IMpurity C1 (trans-Monoacrylate) AtracuriuM IMpurity C1 (trans-Monoacrylate)
AzithroMycin IMpurity C AzithroMycin IMpurity C
AztreonaM IMpurity D AztreonaM IMpurity D
Busulfan IMpurity 1 Busulfan IMpurity 1 1797106-48-9 C6H14O5S2
Deferasirox Ethyl Ester Deferasirox Ethyl Ester 201530-79-2 C23H19N3O4
MetoclopraMide IMpurity F MetoclopraMide IMpurity F 38339-95-6 C13H20ClN3O2
Metronidazole IMpurity E Metronidazole IMpurity E
Propofol IMpurity H Propofol IMpurity H
R-(-)-O-DesMethyl-Venlafaxine-d6 R-(-)-O-DesMethyl-Venlafaxine-d6 1062609-96-4 C16H25NO2
Ribavirin IMp. C (EP) Ribavirin IMp. C (EP)
SalMeterol IMpurity B SalMeterol IMpurity B C25H37NO4
Sitagliptin N-Phoshate IMpurity Sitagliptin N-Phoshate IMpurity 1351498-25-3 C16H16F6N5O4P
SulbactaM IMpurity E SulbactaM IMpurity E
TriMethopriM IMpurity A TriMethopriM IMpurity A 213745-86-9 C15H20N4O3
Varenicline Metadinitro IMpurity Varenicline Metadinitro IMpurity
1-(4-methoxyphenyl)-2-methylpropan-2-amine 1-(4-methoxyphenyl)-2-methylpropan-2-amine 56490-94-9 C11H17NO
product/153101 product/153101
2-Methyl-5,6-dihydro-4H-benzo[b]oxazolo[5,4-d]azepine 2-Methyl-5,6-dihydro-4H-benzo[b]oxazolo[5,4-d]azepine 877858-27-0 C12H12N2O
Apixaban IMpurity(BMS-778960-01) Apixaban IMpurity(BMS-778960-01)
1,3,5-Tri-O-benzoyl-2-deoxy-2-fluoro-α-D-ribofuranose 1,3,5-Tri-O-benzoyl-2-deoxy-2-fluoro-α-D-ribofuranose 704916-12-1 C26H21FO7
Chlorpheniramine Chlorpheniramine 78539-96-5 C16H19ClN2
9-(2,5-d|Dioxo-L-3-aMino-1-pyrrolidineacetic acid)-10-deglycine DaptoMycin 9-(2,5-d|Dioxo-L-3-aMino-1-pyrrolidineacetic acid)-10-deglycine DaptoMycin 121869-35-0 C72H99N17O25
(1S,2S,5S)-4-[2-[2-(6,6-DiMethylbicyclo[3.1.1]hept-2-yl)ethoxy]ethyl]Morpholine (1S,2S,5S)-4-[2-[2-(6,6-DiMethylbicyclo[3.1.1]hept-2-yl)ethoxy]ethyl]Morpholine 38284-47-8 C17H31NO2
[4-(4-AMino-6-hydroxy-7-Methoxy-2-quinazolinyl)-1-piperazinyl](tetrahydro-2-furanyl)Methanone [4-(4-AMino-6-hydroxy-7-Methoxy-2-quinazolinyl)-1-piperazinyl](tetrahydro-2-furanyl)Methanone 105356-89-6 C18H23N5O4
2,2'-[4-(2-Methylpropoxy)-1,3-phenylene]bis[4-Methyl-5-thiazolecarboxylic Acid 5,5'-DiMethyl Ester 2,2'-[4-(2-Methylpropoxy)-1,3-phenylene]bis[4-Methyl-5-thiazolecarboxylic Acid 5,5'-DiMethyl Ester 1330632-47-7 C22H24N2O5S2
2-(DiethylaMino)-N-(2,4-diMethylphenyl)acetaMide Hydrochloride 2-(DiethylaMino)-N-(2,4-diMethylphenyl)acetaMide Hydrochloride 17289-54-2 C14H23ClN2O
3-(5-Methyl-1H-iMidazol-1-yl)-5-(trifluoroMethyl)benzenaMine 3-(5-Methyl-1H-iMidazol-1-yl)-5-(trifluoroMethyl)benzenaMine 641571-16-6 C11H10F3N3
4-[[3-(4-Methylphenyl)-3-oxo-1-(trifluoroMethyl)propylidene]aMino]benzenesulfonaMide 4-[[3-(4-Methylphenyl)-3-oxo-1-(trifluoroMethyl)propylidene]aMino]benzenesulfonaMide 1061214-09-2 C17H15F3N2O3S
5-(Ethoxycarbonyl)-2-(hydroxyMethyl-6-Methyl-4-(3-nitrophenyl)nicotinic Acid 5-(Ethoxycarbonyl)-2-(hydroxyMethyl-6-Methyl-4-(3-nitrophenyl)nicotinic Acid 89267-43-6 C17H16N2O7
9-L-β-Aspartic acid-daptoMycin 9-L-β-Aspartic acid-daptoMycin 123180-72-3 C72H101N17O26
Chlorhexidine Digluconate IMpurity K Chlorhexidine Digluconate IMpurity K 1381962-77-1 C22H29Cl2N9O
Cyclopropyl 3-Fluorobenzyl Ketone Cyclopropyl 3-Fluorobenzyl Ketone 952722-64-4 C11H11FO
Linear DaptoMycin Linear DaptoMycin 883991-21-7 C72H103N17O27
N,N-DiMethylaMidino) Urea N,N-DiMethylaMidino) Urea 98026-16-5 C4H10N4O
rac Dehydro-O-desMethyl Venlafaxine rac Dehydro-O-desMethyl Venlafaxine 1346600-38-1 C16H23NO
3-HYDROXY DESLORATADINE HCL 3-HYDROXY DESLORATADINE HCL 119410-08-1 C19H19ClN2O
2-Fluoro-α-(2-methyl-1-oxopropyl)-γ-oxo-N,β-diphenyl-benzenebutanamide 2-Fluoro-α-(2-methyl-1-oxopropyl)-γ-oxo-N,β-diphenyl-benzenebutanamide 1797905-42-0 C26H24FNO3
Atorvastatin Lactam Lactone Atorvastatin Lactam Lactone 1795791-15-9 C33H31FN2O5
Vinorelbine N'b-Oxide Sulfate Salt Vinorelbine N'b-Oxide Sulfate Salt 74075-34-6 C45H54N4O9
Linagliptin iMpurity G Linagliptin iMpurity G 668270-11-9 C25H28N8O2
Tadalafil EP IMpurity F Tadalafil EP IMpurity F
(2R,3R,4R,5S)-5-(4-benzaMido-2-oxopyriMidin-1(2H)-yl)-2-((benzoyloxy)Methyl)-4-fluoro-4-Methyltetrahydrofuran-3-yl benzoate (2R,3R,4R,5S)-5-(4-benzaMido-2-oxopyriMidin-1(2H)-yl)-2-((benzoyloxy)Methyl)-4-fluoro-4-Methyltetrahydrofuran-3-yl benzoate 874638-94-5 C31H26FN3O7
CefuroxiMe sodiuM iMpurity B CefuroxiMe sodiuM iMpurity B C16H16N4NaO8S
Fasudil N-hydroxy iMpurity Fasudil N-hydroxy iMpurity 1350827-92-7 C14H17N3O3S
TaMsulosin IMpurity A TaMsulosin IMpurity A C20H28N2O5S
1-((2'-cyanobiphenyl-4-yl)Methyl)-2-ethoxy-1H-benziMidazole-7-carboxylic acid 1-((2'-cyanobiphenyl-4-yl)Methyl)-2-ethoxy-1H-benziMidazole-7-carboxylic acid 632322-61-3 C24H19N3O3
4-[4-(diMethylaMino)-1-(4-fluorophenyl)-1-buten-1-yl]-3-(hydroxyMethyl)-benzonitrile (CitalopraM Olefinic IMpurity) 4-[4-(diMethylaMino)-1-(4-fluorophenyl)-1-buten-1-yl]-3-(hydroxyMethyl)-benzonitrile (CitalopraM Olefinic IMpurity) 920282-75-3 C20H21FN2O
2-(2-(4-(Dibenzo[b,f][1,4]thiazepin-11-yl)piperazin-1-yl)ethoxy)ethyl Acetate 2-(2-(4-(Dibenzo[b,f][1,4]thiazepin-11-yl)piperazin-1-yl)ethoxy)ethyl Acetate 844639-07-2 C23H27N3O3S
4-O-DesMethyl 4-O-Ethyl TriMethopriM 4-O-DesMethyl 4-O-Ethyl TriMethopriM 78025-68-0 C15H20N4O3
1-[[(2E)-3-Phenyl-2-propen-1-yl]oxy]naphthalene 1-[[(2E)-3-Phenyl-2-propen-1-yl]oxy]naphthalene 1091626-77-5 C19H16O
HERBACETIN-3,8-DIGLUCOPYRANOSIDE HERBACETIN-3,8-DIGLUCOPYRANOSIDE 99224-12-1 C27H30O17
ACETAMINOPURINE ACETAMINOPURINE 6034-68-0 C7H7N5O
2-(4-HYDROXY-PHENYL)-4-METHYL-THIAZOLE-5-CARBOXYLIC ACID 2-(4-HYDROXY-PHENYL)-4-METHYL-THIAZOLE-5-CARBOXYLIC ACID 886501-78-6 C11H9NO3S
Methyl-5-chlorothiophene-2-carboxylate Methyl-5-chlorothiophene-2-carboxylate 35475-03-7 C6H5ClO2S
α-[[[2-(4-Methoxyphenyl)-1-Methylethyl](phenylMethyl)aMino]Methyl]-3-nitro-4-(phenylMethoxy)benzeneMethanol α-[[[2-(4-Methoxyphenyl)-1-Methylethyl](phenylMethyl)aMino]Methyl]-3-nitro-4-(phenylMethoxy)benzeneMethanol 43229-67-0 C32H34N2O5
Indacaterol IMrity Indacaterol IMrity 1235445-80-3 C24H28N2O3
Topiroxostat IMpurity Topiroxostat IMpurity
Flurbiprofen Impurity 17 Flurbiprofen Impurity 17 1206101-29-2 C24H16F2
Azilsartan Impurity Azilsartan Impurity 1586011-04-2 C26H25N3O4
1,2-Bis(piperazin-1-yl)benzene 1,2-Bis(piperazin-1-yl)benzene 1446750-99-7 C14H22N4
7-Methoxy-4-oxo-1,4-dihydroquinoline-6-carboxylic acid 7-Methoxy-4-oxo-1,4-dihydroquinoline-6-carboxylic acid 417721-34-7 C11H9NO4
Pemetrexed Pemetrexed
Venlafaxine Venlafaxine C17H27NO2
(S)-4,5-dichloro-N-((2-oxo-3-(4-(3-oxoMorpholino)phenyl)oxazolidin-5-yl)Methyl)thiophene-2-carboxaMide (S)-4,5-dichloro-N-((2-oxo-3-(4-(3-oxoMorpholino)phenyl)oxazolidin-5-yl)Methyl)thiophene-2-carboxaMide 1770812-37-7 C19H17Cl2N3O5S
2-Propen-1-one, 1-[4-[4-aMino-3-(4-phenoxyphenyl)-1H-pyrazolo[3,4-d]pyriMidin-1-yl]-1-piperidinyl]- 2-Propen-1-one, 1-[4-[4-aMino-3-(4-phenoxyphenyl)-1H-pyrazolo[3,4-d]pyriMidin-1-yl]-1-piperidinyl]- 936563-92-7 C25H24N6O2
8-cyclopentyl-5-Methyl-2-((5-(piperazin-1-yl)pyridin-2-yl)aMino)-6-vinylpyrido[2,3-d]pyriMidin-7(8H)-one 8-cyclopentyl-5-Methyl-2-((5-(piperazin-1-yl)pyridin-2-yl)aMino)-6-vinylpyrido[2,3-d]pyriMidin-7(8H)-one C24H29N7O
D-Alanine, N-[[P(R),2'R]-2'-deoxy-2'-fluoro-2'-Methyl-P-phenyl-5'-uridylyl]-, 1-Methylethyl ester D-Alanine, N-[[P(R),2'R]-2'-deoxy-2'-fluoro-2'-Methyl-P-phenyl-5'-uridylyl]-, 1-Methylethyl ester 1496552-16-9 C22H29FN3O9P
D-Phenylalanine, N-[(1,1-diMethylethoxy)carbonyl]-L-leucyl-, Methyl ester D-Phenylalanine, N-[(1,1-diMethylethoxy)carbonyl]-L-leucyl-, Methyl ester 15136-32-0 C21H32N2O5
4-Nitro-2-phenoxyphenol 4-Nitro-2-phenoxyphenol 70995-08-3 C12H9NO4
Sofosbuvir Impurity Sofosbuvir Impurity 1233335-82-4 C16H25FN3O9P
Ethyl 3,4-O-isopropylideneshikiMate Ethyl 3,4-O-isopropylideneshikiMate 136994-78-0 C12H18O5
4-Vinyl-piperidine-4-carboxylic acid ethyl ester 4-Vinyl-piperidine-4-carboxylic acid ethyl ester 1509910-91-1 C10H17NO2
(2R,4S)-5-([1,1'-biphenyl]-4-yl)-4-aMino-2-Methylpentanoic acid (2R,4S)-5-([1,1'-biphenyl]-4-yl)-4-aMino-2-Methylpentanoic acid 1039307-95-3 C18H21NO2
EMpagliflozin iMpurity 16 EMpagliflozin iMpurity 16
((R)-2-biphenyl-4-yl-1-forMylethyl)carbaMic acid t-butyl ester ((R)-2-biphenyl-4-yl-1-forMylethyl)carbaMic acid t-butyl ester 149709-58-0 C20H23NO3
1-(2,3-DiMethylphenyl)-1-(1H-iMidazol-4-yl)ethanol 1-(2,3-DiMethylphenyl)-1-(1H-iMidazol-4-yl)ethanol 86347-12-8 C13H16N2O
(R)-3-((R)-5-(4-fluorophenyl)-5-hydroxypentanoyl)-4-phenyloxazolidin-2-one (R)-3-((R)-5-(4-fluorophenyl)-5-hydroxypentanoyl)-4-phenyloxazolidin-2-one 1612153-32-8 C20H20FNO4
(S)-3-((R)-5-(4-fluorophenyl)-5-hydroxypentanoyl)-4-phenyloxazolidin-2-one (S)-3-((R)-5-(4-fluorophenyl)-5-hydroxypentanoyl)-4-phenyloxazolidin-2-one 528565-93-7 C20H20FNO4
Posaconazole iMpurity 3 Posaconazole iMpurity 3
Bezafibrate Impurity D Bezafibrate Impurity D 41859-58-9 C21H24ClNO4
Cloxacillin Sodium EP Impurity B (Mixture of Diastereomers) Cloxacillin Sodium EP Impurity B (Mixture of Diastereomers) 1642559-64-5 C18H20ClN3O4S
Ezetimibe Related Impurity 37 Ezetimibe Related Impurity 37 204589-68-4 C24H19F2NO2
S, R-Isovalganciclovir Impurity S, R-Isovalganciclovir Impurity 1356932-18-7 C14H22N6O5
Sofosbuvir Impurity 8 Sofosbuvir Impurity 8 944476-44-2 C24H22N2O8
135270-13-2 135270-13-2 135270-13-2 C12H11F2N3O
1-((2'-cyanobiphenyl-4-yl)methyl)-4-methyl-2-propyl-1H-benzo[d]imidazole-6-carboxylic acid 1-((2'-cyanobiphenyl-4-yl)methyl)-4-methyl-2-propyl-1H-benzo[d]imidazole-6-carboxylic acid 1098100-87-8 C26H23N3O2
Fimasartan Impurity Fimasartan Impurity
2-(((5-(2-fluorophenyl)-1-(pyridin-3-ylsulfonyl)-1H-pyrrol-3-yl)methyl)(methyl)amino)succinic acid 2-(((5-(2-fluorophenyl)-1-(pyridin-3-ylsulfonyl)-1H-pyrrol-3-yl)methyl)(methyl)amino)succinic acid C21H20FN3O6S
()-Olivil 4″-O-glucoside ()-Olivil 4″-O-glucoside 76880-93-8 C26H34O12
2-(DIETHYLAMINO)-N-(2,4-DIMETHYLPHENYL)ACETAMIDE 2-(DIETHYLAMINO)-N-(2,4-DIMETHYLPHENYL)ACETAMIDE 17289-53-1 C14H22N2O
(3RS)-3-[(Dimethylamino)methyl]-9-methyl-1,2,3,9-tetrahydro-4H-carbazol-4-one (3RS)-3-[(Dimethylamino)methyl]-9-methyl-1,2,3,9-tetrahydro-4H-carbazol-4-one C16H20N2O
Ropivacaine-iPr-R Ropivacaine-iPr-R 1050482-18-2 C17H26N2O
Demiditraz IMpurity Demiditraz IMpurity 944268-66-0 C20H22N2O
AcarBose EP Impurity B AcarBose EP Impurity B 1220983-54-9 C26H43NO17
2,3,5,6-tetradeuterio-4-[5-[4-(hydroxymethyl)phenyl]-3-(trifluoromethyl)pyrazol-1-yl]benzenesulfonamide 2,3,5,6-tetradeuterio-4-[5-[4-(hydroxymethyl)phenyl]-3-(trifluoromethyl)pyrazol-1-yl]benzenesulfonamide 1276524-56-1 C17H10D4F3N3O3S
1,1-diphenylpropan-1-ol 1,1-diphenylpropan-1-ol 5180-33-6 C15H16O
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