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Pharmaceutical Impurity Reference Standards
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- Structure:
- Chemical Name:
- 2-(2-Ethoxyphenoxy)ethyl Methanesulfonate
- CAS:
- 169506-15-4
- MF:
- C11H16O5S
- Structure:
- Chemical Name:
- 1-(5-(benzyloxy)-2-hydroxy-3-nitrophenyl)ethanone
- CAS:
- 861841-94-3
- MF:
- C15H13NO5
- Chemical Name:
- acetylated penicilloic acids of piperacillin
- Structure:
- Chemical Name:
- Atorvastatin Dehydro Lactone
- CAS:
- 442851-50-5
- MF:
- C33H31FN2O3
- Chemical Name:
- penicilloic acids of piperacillin
- Structure:
- Chemical Name:
- 5-(TRIFLUOROMETHYL)-3-P-TOLYL-1H-PYRAZOLE
- CAS:
- 219986-64-8
- MF:
- C11H9F3N2
- Structure:
- Chemical Name:
- (1S,2S,3R,5S)-3-(7-(((1R,2S)-2-(4-fluorophenyl)cyclopropyl)amino)-5-(propylthio)-3H-[1,2,3]triazolo[4,5-d]pyrimidin-3-yl)-5-(2-hydroxyethoxy)cyclopentane-1,2-diol
- MF:
- C23H29FN6O4S
- Structure:
- Chemical Name:
- (5-Ethyl-1H-imidazol-4-yl)methanol
- CAS:
- 38603-74-6
- MF:
- C6H10N2O
- Structure:
- Chemical Name:
- (Z)-1-(6-methylpyridin-3-yl)-2-(4-(methylsulfonyl)phenyl)ethanone oxime
- CAS:
- 1810761-43-3
- MF:
- C15H16N2O3S
- Structure:
- Chemical Name:
- tert-butyl 2-((4R,6S)-6-(2-aminoethyl)-2,2-dimethyl-1,3-dioxan-4-yl)acetate
- MF:
- C14H27NO4
- Chemical Name:
- Apixaban Impurity A
- Structure:
- Chemical Name:
- ethylidene phthalide
- CAS:
- 61658-90-0
- MF:
- C10H8O2
- Structure:
- Chemical Name:
- 6-amino-2-(1-(2-fluorobenzyl)-1H-pyrazolo[3,4-b]pyridin-3-yl) -7-methyl-7,9-dihydro-8H-purin-8-one
- CAS:
- 1361569-18-7
- MF:
- C19H15FN8O
- Structure:
- Chemical Name:
- LORATADINE IMPURITY F
- MF:
- C22H23ClN2O2
- Chemical Name:
- ZIDOVUDINE IMPURITY A
- Structure:
- Chemical Name:
- Propanoic acid, 2-[[(Z)-[1-(2-amino-4-thiazolyl)-2-[[(2S,3S)-2-methyl-4-oxo-1-sulfo-3-azetidinyl]amino]-2-oxoethylidene]amino]oxy]-2-methyl-, 1-(1,1-dimethylethyl) ester
- CAS:
- 330944-50-8
- MF:
- C17H25N5O8S2
- Structure:
- Chemical Name:
- Canagliflozin Peroxide Impurity
- CAS:
- 2247196-28-5
- MF:
- C24H25FO7S
- Structure:
- Chemical Name:
- (αR)-α-Methyl-N-[3-[3-(trifluoromethyl)phenyl]propyl]-2-naphthalenemethanamine Hydrochloride
- CAS:
- 2200269-28-7
- MF:
- C22H23ClF3N
- Structure:
- Chemical Name:
- 5-ForMyl-8-hydroxycarbostyril
- CAS:
- 68304-21-2
- MF:
- C10H7NO3
- Chemical Name:
- Capecitabine Related Compound A
- Structure:
- Chemical Name:
- 1-Pyrrolidineaceticacid,2-(aminocarbonyl)-,(2S)-(9CI)
- CAS:
- 277751-02-7
- MF:
- C7H12N2O3
- Structure:
- Chemical Name:
- 2-Pyrrolidinecarbonitrile,1-acetyl-,(2S)-(9CI)
- CAS:
- 700376-84-7
- MF:
- C7H10N2O
- Structure:
- Chemical Name:
- 1-Azetidinesulfonamide(9CI)
- CAS:
- 654073-32-2
- MF:
- C3H8N2O2S
- Structure:
- Chemical Name:
- 1-Piperazinecarboxylicacid,4-methyl-,ethylester(6CI,9CI)
- CAS:
- 59325-11-0
- MF:
- C8H16N2O2
- Structure:
- Chemical Name:
- PLANTAGININ
- CAS:
- 26046-94-6
- MF:
- C21H20O11
- Structure:
- Chemical Name:
- 2-(2-Chloroethyl)thiophene
- CAS:
- 19995-38-1
- MF:
- C6H7ClS
- Structure:
- Chemical Name:
- 2'',3'',5''-Triacetyl -azacytidine
- CAS:
- 10302-78-0
- MF:
- C14H18N4O8
- Structure:
- Chemical Name:
- N-Methyl Pantoprazole, mixture of 1 and 3 isomers
- CAS:
- 624742-53-6
- MF:
- C17H17F2N3O4S
- Structure:
- Chemical Name:
- N-DESMETHYLGALANTHAMINE
- CAS:
- 41303-74-6
- MF:
- C16H19NO3
- Structure:
- Chemical Name:
- 2-[6-(2-hydroxy-2-phenyl-ethyl)-1-methyl-2-piperidyl]-1-phenyl-ethanol
- CAS:
- 552-72-7
- MF:
- C22H29NO2
- Structure:
- Chemical Name:
- 4-Amino-1-3,5-di-O-benzoyl-2-deoxy-2,2-difluoro-a-D-erythro-pentofuranosyl)-2(1H)-pyrimidinone
- CAS:
- 134790-40-2
- MF:
- C23H19F2N3O6
- Structure:
- Chemical Name:
- Granisetron Impurity C
- CAS:
- 160177-67-3
- MF:
- C17H22N4O
- Structure:
- Chemical Name:
- Betaxolol EP Impurity A
- CAS:
- 67193-95-7
- MF:
- C14H23NO2
- Structure:
- Chemical Name:
- 3,5-Bis(benzyloxy)benzoic acid benzyl ester
- CAS:
- 50513-72-9
- MF:
- C28H24O4
- Structure:
- Chemical Name:
- [(2,3-Dihydro-1,5-dimethyl-3-oxo-2-phenyl-1H-pyrazol-4-yl)amino]methanesulfonic acid
- CAS:
- 117-38-4
- MF:
- C12H15N3O4S
- Structure:
- Chemical Name:
- 2-Amino-5-bromobenzaldehyde
- CAS:
- 29124-57-0
- MF:
- C7H6BrNO
- Structure:
- Chemical Name:
- (R)-(+)-3-(N-METHYLAMINO)-1-(2-THIENYL)-1-PROPANOL
- CAS:
- 116539-57-2
- MF:
- C8H13NOS
- Structure:
- Chemical Name:
- 2-(4-Fluorophenyl)-δ-hydroxy-5-(1-methylethyl)-β-oxo-3-phenyl-4-[(phenylamino)carbonyl]-1H-pyrrole-1-heptanoic Acid 1,1-Dimethylethyl Ester
- CAS:
- 947262-20-6
- MF:
- C37H41FN2O5
- Chemical Name:
- Atorvastatin Impurity E Intermediate
- Chemical Name:
- Ceftazidime Double Mother Nucleus Impurity
- Chemical Name:
- Faropenem Degradation Impurity B
- Structure:
- Chemical Name:
- Oxacillin Impurity 1
- CAS:
- 36231-30-8
- MF:
- C19H19N3O6S
- Chemical Name:
- Brivaracetam Impurity 33
- Structure:
- Chemical Name:
- Arformoterol Impurity 24
- CAS:
- 477552-93-5
- MF:
- C19H24N2O3
- Structure:
- Chemical Name:
- Pregabalin Impurity 99
- CAS:
- 949890-75-9
- MF:
- C16H23NO4
- Structure:
- Chemical Name:
- Roxatidine Impurity 9
- CAS:
- 87327-60-4
- MF:
- C4H6O4
- Chemical Name:
- Regofenib impurity K
- Chemical Name:
- Chlorpheniramine Impurity 4
- Chemical Name:
- Peramivir Impurity 43
- Structure:
- Chemical Name:
- N-(4-BROMOBUTYL)-7-(4-BROMOBUTOXY)-QUINOLINE-2(1H)-ONE
- CAS:
- 1076199-56-8
- MF:
- C17H21Br2NO2
- Structure:
- Chemical Name:
- 7-methoxy-3,4-dihydro-1-naphthalenylacetonitrile
- CAS:
- 861960-34-1
- MF:
- C13H13NO
- Structure:
- Chemical Name:
- METHYL 2-[(2,5-DICHLOROBENZOYL)AMINO]ACETATE
- CAS:
- 338965-44-9
- MF:
- C10H9Cl2NO3
- Chemical Name:
- Tafluprost Impurity 17
- Chemical Name:
- Rosuvastatin Impurity 160 （Sodium salt)
- Chemical Name:
- Rosuvastatin Impurity 143
- Chemical Name:
- Rosuvastatin Impurity 131
- Chemical Name:
- Rosuvastatin Impurity 125
- Chemical Name:
- Metabotropic glutamate receptor 5 (GRM5) Antibody
- Chemical Name:
- Terlipressin Impurity 2 (des-Gly1,Gly2)
- Structure:
- Chemical Name:
- BENZHYDRYL 6,6-DIHYDROPENICILLIC ACID 1-OXIDE[TAZOBACTAM INTERMEDIATE]
- CAS:
- 87579-78-0
- MF:
- C21H21NO4S
- Chemical Name:
- 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
- Chemical Name:
- Ertapenem Impurity C(USP)
- Chemical Name:
- Ertapenem Impurity 22
- Structure:
- Chemical Name:
- Pyrazinecarboxylic acid, 5-methyl-, 1-oxide (9CI)
- CAS:
- 98502-96-6
- MF:
- C6H6N2O3
- Structure:
- Chemical Name:
- 1,4-Butanediaminium, N1,N4-diethyl-N1,N1,N4,N4-tetrakis(1-methylethyl)-, bromide (1:2)
- CAS:
- 1621467-18-2
- MF:
- C20H46BrN2+
- Structure:
- Chemical Name:
- 1,6,10,14-Hexadecatetraen-3-ol, 3,7,11,15-tetramethyl-, (6Z,10E)-
- CAS:
- 3790-76-9
- MF:
- C20H34O
- Chemical Name:
- Bisoprolol Impurity 51
- Structure:
- Chemical Name:
- 2-Deoxy-2,2-difluoro-D-ribofuranose-3,5-dibenzoate-1-methanesulfonate
- CAS:
- 134877-42-2
- MF:
- C20H18F2O8S
- Chemical Name:
- Pitavastatin Impurity 105
- Chemical Name:
- Nirmatrelvir Impurity 11
- Chemical Name:
- Bumetanide Impurity 21
- Chemical Name:
- Amoxicillin related impurities K
- Structure:
- Chemical Name:
- 4'-(Hydroxymethyl)-[1,1'-Biphenyl]-2-Carboxylic Acid
- CAS:
- 158144-54-8
- MF:
- C14H12O3
- Chemical Name:
- Brivaracetam Impurity 118
- Chemical Name:
- 1-(4-((2-(4-hydroxypiperidin-1-yl)ethyl)(methyl)carbamoyl)benzyl)piperidine-4-carboxylic acid
- CAS:
- 2975124-11-7
- Chemical Name:
- Empagliflozin Impurity 108
- Chemical Name:
- Perospirone Impurity 28
- Chemical Name:
- Perospirone Impurity 23
- Chemical Name:
- Perospirone Impurity 16
- Chemical Name:
- Dolutegravir Impurity 24
- Chemical Name:
- Paxlovid Impurity 18
- Chemical Name:
- NA
- Structure:
- Chemical Name:
- Lisinopril R,S,S-Diketopiperazine
- CAS:
- 219677-82-4
- MF:
- C21H29N3O4
- Structure:
- Chemical Name:
- 4-Chloromethyl-N-[4-methyl-3-[[4-(pyridin-3-yl)pyrimidin-2-yl]amino]phenyl]benzamide
- CAS:
- 404844-11-7
- MF:
- C24H20ClN5O
- Structure:
- Chemical Name:
- 6-Mercaptopurine disulfide
- CAS:
- 49808-20-0
- MF:
- C10H6N8S2
- Structure:
- Chemical Name:
- Dexivacaine
- CAS:
- 24358-84-7
- MF:
- C15H22N2O
- Structure:
- Chemical Name:
- (1S,4R)-4-Amino-2-cyclopenten-1-carboxylic Acid Hydrochloride
- CAS:
- 134234-04-1
- MF:
- C6H9NO2
- Structure:
- Chemical Name:
- erythronolide B
- CAS:
- 3225-82-9
- MF:
- C21H38O7
- Structure:
- Chemical Name:
- desmethylmianserin
- CAS:
- 71936-92-0
- MF:
- C17H18N2
- Structure:
- Chemical Name:
- 3-demethylthiocolchicine
- CAS:
- 87424-25-7
- MF:
- C21H23NO5S
- Structure:
- Chemical Name:
- 2,6-di-tert-butyl-4-methylene-2,5-cyclohexadienone
- CAS:
- 2607-52-5
- MF:
- C15H22O
- Structure:
- Chemical Name:
- 2-acetyl-2-decarboxamidooxytetracycline
- CAS:
- 6542-44-5
- MF:
- C23H25NO8
- Structure:
- Chemical Name:
- 7,8-dehydro-9,10-desacetyldoxorubicinone
- CAS:
- 64845-67-6
- MF:
- C19H12O6
- Structure:
- Chemical Name:
- (S)-4-(4-Nitrobenzyl)-2-oxazolidinone
- CAS:
- 139264-55-4
- MF:
- C10H10N2O4
- Structure:
- Chemical Name:
- 6-(Benzyloxy)-9-((1S,3S)-4-(benzyloxy)-3-((benzyloxy)methyl)-2-methylenecyclopentyl)-N-((4-methoxyphenyl)diphenylmethyl)-9H-purin-2-amine
- CAS:
- 142217-80-9
- MF:
- C53H49N5O4
- Structure:
- Chemical Name:
- 2-(4-Hydroxymethylphenyl)phenylsulfonamide
- CAS:
- 158144-55-9
- MF:
- C15H14O3
- Structure:
- Chemical Name:
- 4-[2-(CYCLOPROPYLMETHOXY)ETHYL]PHENOL
- CAS:
- 63659-16-5
- MF:
- C12H16O2