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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
METHYL 2-[(2,5-DICHLOROBENZOYL)AMINO]ACETATE METHYL 2-[(2,5-DICHLOROBENZOYL)AMINO]ACETATE 338965-44-9 C10H9Cl2NO3
Betaxolol EP Impurity A Betaxolol EP Impurity A 67193-95-7 C14H23NO2
3,5-Bis(benzyloxy)benzoic acid benzyl ester 3,5-Bis(benzyloxy)benzoic acid benzyl ester 50513-72-9 C28H24O4
[(2,3-Dihydro-1,5-dimethyl-3-oxo-2-phenyl-1H-pyrazol-4-yl)amino]methanesulfonic acid [(2,3-Dihydro-1,5-dimethyl-3-oxo-2-phenyl-1H-pyrazol-4-yl)amino]methanesulfonic acid 117-38-4 C12H15N3O4S
2-Amino-5-bromobenzaldehyde 2-Amino-5-bromobenzaldehyde 29124-57-0 C7H6BrNO
(R)-(+)-3-(N-METHYLAMINO)-1-(2-THIENYL)-1-PROPANOL (R)-(+)-3-(N-METHYLAMINO)-1-(2-THIENYL)-1-PROPANOL 116539-57-2 C8H13NOS
PLANTAGININ PLANTAGININ 26046-94-6 C21H20O11
2-(2-Chloroethyl)thiophene 2-(2-Chloroethyl)thiophene 19995-38-1 C6H7ClS
2'',3'',5''-Triacetyl -azacytidine 2'',3'',5''-Triacetyl -azacytidine 10302-78-0 C14H18N4O8
N-Methyl Pantoprazole, mixture of 1 and 3 isomers N-Methyl Pantoprazole, mixture of 1 and 3 isomers 624742-53-6 C17H17F2N3O4S
N-DESMETHYLGALANTHAMINE N-DESMETHYLGALANTHAMINE 41303-74-6 C16H19NO3
2-[6-(2-hydroxy-2-phenyl-ethyl)-1-methyl-2-piperidyl]-1-phenyl-ethanol 2-[6-(2-hydroxy-2-phenyl-ethyl)-1-methyl-2-piperidyl]-1-phenyl-ethanol 552-72-7 C22H29NO2
4-Amino-1-3,5-di-O-benzoyl-2-deoxy-2,2-difluoro-a-D-erythro-pentofuranosyl)-2(1H)-pyrimidinone 4-Amino-1-3,5-di-O-benzoyl-2-deoxy-2,2-difluoro-a-D-erythro-pentofuranosyl)-2(1H)-pyrimidinone 134790-40-2 C23H19F2N3O6
Granisetron Impurity C Granisetron Impurity C 160177-67-3 C17H22N4O
5-ForMyl-8-hydroxycarbostyril 5-ForMyl-8-hydroxycarbostyril 68304-21-2 C10H7NO3
Capecitabine Related Compound A Capecitabine Related Compound A
1-Pyrrolidineaceticacid,2-(aminocarbonyl)-,(2S)-(9CI) 1-Pyrrolidineaceticacid,2-(aminocarbonyl)-,(2S)-(9CI) 277751-02-7 C7H12N2O3
2-Pyrrolidinecarbonitrile,1-acetyl-,(2S)-(9CI) 2-Pyrrolidinecarbonitrile,1-acetyl-,(2S)-(9CI) 700376-84-7 C7H10N2O
Tafluprost Impurity 17 Tafluprost Impurity 17
Rosuvastatin Impurity 160 （Sodium salt) Rosuvastatin Impurity 160 （Sodium salt)
Rosuvastatin Impurity 143 Rosuvastatin Impurity 143
Rosuvastatin Impurity 131 Rosuvastatin Impurity 131
Rosuvastatin Impurity 125 Rosuvastatin Impurity 125
Metabotropic glutamate receptor 5 (GRM5) Antibody Metabotropic glutamate receptor 5 (GRM5) Antibody
Terlipressin Impurity 2 (des-Gly1,Gly2) Terlipressin Impurity 2 (des-Gly1,Gly2)
BENZHYDRYL 6,6-DIHYDROPENICILLIC ACID 1-OXIDE[TAZOBACTAM INTERMEDIATE] BENZHYDRYL 6,6-DIHYDROPENICILLIC ACID 1-OXIDE[TAZOBACTAM INTERMEDIATE] 87579-78-0 C21H21NO4S
4-(2-((2R,3R)-3-(2,5-difluorophenyl)-3-hydroxy-4-(1H-1,2,4-triazol-1-yl)butan-2-yl)thiazol-4-yl)benzamide 4-(2-((2R,3R)-3-(2,5-difluorophenyl)-3-hydroxy-4-(1H-1,2,4-triazol-1-yl)butan-2-yl)thiazol-4-yl)benzamide
Ertapenem Impurity C(USP) Ertapenem Impurity C(USP)
Ertapenem Impurity 22 Ertapenem Impurity 22
(1-carboxy-1-(3-methyl-5-oxo-1-phenyl-4,5-dihydro-1H-pyrazol-4-yl)ethyl)-L-cysteine (1-carboxy-1-(3-methyl-5-oxo-1-phenyl-4,5-dihydro-1H-pyrazol-4-yl)ethyl)-L-cysteine
Pyrazinecarboxylic acid, 5-methyl-, 1-oxide (9CI) Pyrazinecarboxylic acid, 5-methyl-, 1-oxide (9CI) 98502-96-6 C6H6N2O3
1,4-Butanediaminium, N1,N4-diethyl-N1,N1,N4,N4-tetrakis(1-methylethyl)-, bromide (1:2) 1,4-Butanediaminium, N1,N4-diethyl-N1,N1,N4,N4-tetrakis(1-methylethyl)-, bromide (1:2) 1621467-18-2 C20H46BrN2+
1,6,10,14-Hexadecatetraen-3-ol, 3,7,11,15-tetramethyl-, (6Z,10E)- 1,6,10,14-Hexadecatetraen-3-ol, 3,7,11,15-tetramethyl-, (6Z,10E)- 3790-76-9 C20H34O
Bisoprolol Impurity 51 Bisoprolol Impurity 51
2-Deoxy-2,2-difluoro-D-ribofuranose-3,5-dibenzoate-1-methanesulfonate 2-Deoxy-2,2-difluoro-D-ribofuranose-3,5-dibenzoate-1-methanesulfonate 134877-42-2 C20H18F2O8S
Pitavastatin Impurity 105 Pitavastatin Impurity 105
Nirmatrelvir Impurity 11 Nirmatrelvir Impurity 11
Lisinopril R,S,S-Diketopiperazine Lisinopril R,S,S-Diketopiperazine 219677-82-4 C21H29N3O4
4-Chloromethyl-N-[4-methyl-3-[[4-(pyridin-3-yl)pyrimidin-2-yl]amino]phenyl]benzamide 4-Chloromethyl-N-[4-methyl-3-[[4-(pyridin-3-yl)pyrimidin-2-yl]amino]phenyl]benzamide 404844-11-7 C24H20ClN5O
6-Mercaptopurine disulfide 6-Mercaptopurine disulfide 49808-20-0 C10H6N8S2
Dexivacaine Dexivacaine 24358-84-7 C15H22N2O
1-Azetidinesulfonamide(9CI) 1-Azetidinesulfonamide(9CI) 654073-32-2 C3H8N2O2S
1-Piperazinecarboxylicacid,4-methyl-,ethylester(6CI,9CI) 1-Piperazinecarboxylicacid,4-methyl-,ethylester(6CI,9CI) 59325-11-0 C8H16N2O2
(1S,4R)-4-Amino-2-cyclopenten-1-carboxylic Acid Hydrochloride (1S,4R)-4-Amino-2-cyclopenten-1-carboxylic Acid Hydrochloride 134234-04-1 C6H9NO2
erythronolide B erythronolide B 3225-82-9 C21H38O7
desmethylmianserin desmethylmianserin 71936-92-0 C17H18N2
3-demethylthiocolchicine 3-demethylthiocolchicine 87424-25-7 C21H23NO5S
2,6-di-tert-butyl-4-methylene-2,5-cyclohexadienone 2,6-di-tert-butyl-4-methylene-2,5-cyclohexadienone 2607-52-5 C15H22O
2-acetyl-2-decarboxamidooxytetracycline 2-acetyl-2-decarboxamidooxytetracycline 6542-44-5 C23H25NO8
7,8-dehydro-9,10-desacetyldoxorubicinone 7,8-dehydro-9,10-desacetyldoxorubicinone 64845-67-6 C19H12O6
(S)-4-(4-Nitrobenzyl)-2-oxazolidinone (S)-4-(4-Nitrobenzyl)-2-oxazolidinone 139264-55-4 C10H10N2O4
6-(Benzyloxy)-9-((1S,3S)-4-(benzyloxy)-3-((benzyloxy)methyl)-2-methylenecyclopentyl)-N-((4-methoxyphenyl)diphenylmethyl)-9H-purin-2-amine 6-(Benzyloxy)-9-((1S,3S)-4-(benzyloxy)-3-((benzyloxy)methyl)-2-methylenecyclopentyl)-N-((4-methoxyphenyl)diphenylmethyl)-9H-purin-2-amine 142217-80-9 C53H49N5O4
2-(4-Hydroxymethylphenyl)phenylsulfonamide 2-(4-Hydroxymethylphenyl)phenylsulfonamide 158144-55-9 C15H14O3
4-[2-(CYCLOPROPYLMETHOXY)ETHYL]PHENOL 4-[2-(CYCLOPROPYLMETHOXY)ETHYL]PHENOL 63659-16-5 C12H16O2
Bumetanide Impurity 21 Bumetanide Impurity 21
Amoxicillin related impurities K Amoxicillin related impurities K
Amoxicillin related impurities K Amoxicillin related impurities K
4'-(Hydroxymethyl)-[1,1'-Biphenyl]-2-Carboxylic Acid 4'-(Hydroxymethyl)-[1,1'-Biphenyl]-2-Carboxylic Acid 158144-54-8 C14H12O3
Brivaracetam Impurity 118 Brivaracetam Impurity 118
1-(4-((2-(4-hydroxypiperidin-1-yl)ethyl)(methyl)carbamoyl)benzyl)piperidine-4-carboxylic acid 1-(4-((2-(4-hydroxypiperidin-1-yl)ethyl)(methyl)carbamoyl)benzyl)piperidine-4-carboxylic acid 2975124-11-7
Empagliflozin Impurity 108 Empagliflozin Impurity 108
Perospirone Impurity 28 Perospirone Impurity 28
Perospirone Impurity 23 Perospirone Impurity 23
Perospirone Impurity 16 Perospirone Impurity 16
Dolutegravir Impurity 24 Dolutegravir Impurity 24
Paxlovid Impurity 18 Paxlovid Impurity 18
NA NA
Fondaparinux sodium impurity 15 Fondaparinux sodium impurity 15
Fondaparinux Sodium Impurity 10 Fondaparinux Sodium Impurity 10
Oxacillin sodium Impurity E Oxacillin sodium Impurity E
ltrombopag Impurity 26 ltrombopag Impurity 26
Revefenacin Impurity 19 Revefenacin Impurity 19
Caspofungin Impurity 11 Caspofungin Impurity 11
Miglitol Isomer ImpurityA Miglitol Isomer ImpurityA
sodium (6R,7S)-7-(2-mercaptoacetamido)-7-methoxy-3-(((1-methyl-1H-tetrazol-5-yl)thio)methyl)-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylate sodium (6R,7S)-7-(2-mercaptoacetamido)-7-methoxy-3-(((1-methyl-1H-tetrazol-5-yl)thio)methyl)-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylate
Olodaterol Impurity 33 Olodaterol Impurity 33
(1R,4S)-N-Desmethyl Sertraline Hydrochloride (1R,4S)-N-Desmethyl Sertraline Hydrochloride 675126-08-6 C16H15Cl2N.ClH
3-(4-Formylaminobutyryl)pyridine 3-(4-Formylaminobutyryl)pyridine 887355-56-8 C10H12N2O2
Didesmethyl Erlotinib Hydrochloride Salt Didesmethyl Erlotinib Hydrochloride Salt 183320-12-9 C20H20ClN3O4
DESVENLAFAXINE SUCCINATE DESVENLAFAXINE SUCCINATE 448904-47-0 C20H31NO6
Desloratadine IMpurity B Desloratadine IMpurity B 117796-50-6 C19H19BrN2
Itraconazole IMpurity B Itraconazole IMpurity B
Benzene, 1-(3-chloropropyl)-3-(trifluoroMethyl)- Benzene, 1-(3-chloropropyl)-3-(trifluoroMethyl)- 82258-76-2 C10H10ClF3
N-Methyl-N-((3S,4S)-4-Methylpiperidin-3-yl)-7H-pyrrolo[2,3-d]pyriMidin-4-aMine N-Methyl-N-((3S,4S)-4-Methylpiperidin-3-yl)-7H-pyrrolo[2,3-d]pyriMidin-4-aMine 1260614-73-0 C13H19N5
2-(5-oxo-5H-chroMeno[2,3-b]pyridin-7-yl)propanoic acid 2-(5-oxo-5H-chroMeno[2,3-b]pyridin-7-yl)propanoic acid 52549-19-6 C15H11NO4
1H-BenziMidazole, 2-[[[3-Methyl-4-(2,2,2-trifluoroethoxy)-2-pyridinyl]Methyl]sulfinyl]-1-(2,2,2-trifluoroethyl)- 1H-BenziMidazole, 2-[[[3-Methyl-4-(2,2,2-trifluoroethoxy)-2-pyridinyl]Methyl]sulfinyl]-1-(2,2,2-trifluoroethyl)- 1187926-84-6 C18H15F6N3O2S
4,5-dihydro-a-(hydroxyMethyl)-a,3-diMethyl-5-oxo-1-phenyl-1H-Pyrazole-4-Methanesulfonic acid 4,5-dihydro-a-(hydroxyMethyl)-a,3-diMethyl-5-oxo-1-phenyl-1H-Pyrazole-4-Methanesulfonic acid 1242471-40-4 C13H16N2O5S
16α,17-[(1RS)-Butylidenebis(oxy)]-11β-hydroxy-17-(hydroxyMethyl)-D-hoMoandrosta-1,4-diene-3,17a-dione (Mixture of DiastereoMers) 16α,17-[(1RS)-Butylidenebis(oxy)]-11β-hydroxy-17-(hydroxyMethyl)-D-hoMoandrosta-1,4-diene-3,17a-dione (Mixture of DiastereoMers) 1040085-99-1 C25H34O6
2-BroMo-1-cyclopropyl-2-(3-fluorophenyl)ethanone 2-BroMo-1-cyclopropyl-2-(3-fluorophenyl)ethanone 1359829-72-3 C11H10BrFO
N-((4-(5-Methyl-3-phenylisoxazol-4-yl)phenyl)sulfonyl)acetaMide N-((4-(5-Methyl-3-phenylisoxazol-4-yl)phenyl)sulfonyl)acetaMide 198471-06-6 C18H16N2O4S
N-((S)-1-(((S)-1-Hydroxy-3-Methylbutyl)aMino)-1-oxo-3-phenylpropan-2-yl)pyrazine-2-carboxaMide N-((S)-1-(((S)-1-Hydroxy-3-Methylbutyl)aMino)-1-oxo-3-phenylpropan-2-yl)pyrazine-2-carboxaMide 289472-81-7 C19H24N4O3
(Z)-N-(2-nitrovinyl)acetaMide (Z)-N-(2-nitrovinyl)acetaMide 1238305-24-2 C4H6N2O3
Azilsartan iMpurity Azilsartan iMpurity 1604812-35-2 C35H28N4O11
Azilsartan iMpurity N Azilsartan iMpurity N 2244031-86-3 C22H17N3O4
cefoxitin iMpurity B cefoxitin iMpurity B
pidotiMod iMpurity A pidotiMod iMpurity A
Rivaroxaban iMpurity A Rivaroxaban iMpurity A 931204-39-6 C19H20ClN3O6S
R-7H-Pyrido[1,2,3-de]-1,4-benzoxazine-6-carboxylic acid, 9-fluoro-2,3-dihydro-3-Methyl-10-(4-Methyl-1-piperazinyl)-7-oxo- Methyl ester R-7H-Pyrido[1,2,3-de]-1,4-benzoxazine-6-carboxylic acid, 9-fluoro-2,3-dihydro-3-Methyl-10-(4-Methyl-1-piperazinyl)-7-oxo- Methyl ester 1268719-66-9 C19H22FN3O4
Ticagrelor Sulfone Ticagrelor Sulfone 274693-39-9 C23H28F2N6O6S
2-(((3aR,4S,6R,6aS)-6-(7-aMino-5-(propylthio)-3H-[1,2,3]triazolo[4,5-d]pyriMidin-3-yl)-2,2-diMethyltetrahydro-3aH-cyclopenta[d][1,3]dioxol-4-yl)oxy)ethanol 2-(((3aR,4S,6R,6aS)-6-(7-aMino-5-(propylthio)-3H-[1,2,3]triazolo[4,5-d]pyriMidin-3-yl)-2,2-diMethyltetrahydro-3aH-cyclopenta[d][1,3]dioxol-4-yl)oxy)ethanol 1858267-99-8 C17H26N6O4S
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