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Pharmaceutical Impurity Reference Standards
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- Structure:
- Chemical Name:1-Isobutyl-4-piperidone
- CAS:72544-16-2
- MF:C9H17NO
- Structure:
- Chemical Name:Fluphenazine decanoate
- CAS:5002-47-1
- MF:C32H44F3N3O2S
- Structure:
- Chemical Name:Formoterol fumarate dihydrate
- CAS:183814-30-4
- MF:C23H28N2O8
- Structure:
- Chemical Name:Chloramphenicol sodium succinate
- CAS:982-57-0
- MF:C15H15Cl2N2O8.Na
- Structure:
- Chemical Name:GUANERAN
- CAS:5581-52-2
- MF:C9H8N8O2S
- Structure:
- Chemical Name:4-(4-Chloro-benzyl)-2H-phthalazin-1-one
- CAS:53242-88-9
- MF:C15H11ClN2O
- Structure:
- Chemical Name:BENZATHINE PENICILLINE G TETRAHYDRATE
- CAS:41372-02-5
- MF:C32H38N4O4S
- Structure:
- Chemical Name:2,6-DIMETHYL-4-NITROSOPHENOL
- CAS:14818-35-0
- MF:C12H16O2
- Structure:
- Chemical Name:Milbemycin oxime
- CAS:129496-10-2
- MF:2C32H45NO7.2C31H43NO7
- Structure:
- Chemical Name:ALPRENOLOL HYDROCHLORIDE
- CAS:13707-88-5
- MF:C15H24ClNO2
- Structure:
- Chemical Name:4-BUTYL-4-[HYDROXYMETHYL]-1,2-DIPHENYL-3,5-PYRAZOLIDINEDIONE HYDROGEN SUCCINATE [ESTER]
- CAS:27470-51-5
- MF:C24H26N2O6
- Chemical Name:ENTEROKINASE
- CAS:9014-74-8
- MF:NULL
- Chemical Name:CHONDROITIN SULFATE B SODIUM SALT
- CAS:54328-33-5
- MF:NULL
- Structure:
- Chemical Name:DOTHIEPIN HCL
- CAS:897-15-4
- MF:C19H22ClNS
- Structure:
- Chemical Name:Piretanide
- CAS:55837-27-9
- MF:C17H18N2O5S
- Structure:
- Chemical Name:Potassium trichloroammineplatinate (II)
- CAS:13820-91-2
- MF:Cl3H3KNPt
- Structure:
- Chemical Name:Calcium levulinate dihydrate
- CAS:5743-49-7
- MF:C10H18CaO8
- Structure:
- Chemical Name:alpha-Ethyl-2-oxo-1-pyrrolidineacetic acid
- CAS:67118-31-4
- MF:C8H13NO3
- Structure:
- Chemical Name:Rilmenidine phosphate
- CAS:85409-38-7
- MF:C10H19N2O5P
- Structure:
- Chemical Name:Disodium clodronate tetrahydrate
- CAS:88416-50-6
- MF:CH7Cl2NaO7P2
- Structure:
- Chemical Name:Framycetin sulphate
- CAS:4146-30-9
- MF:C23H48N6O17S
- Chemical Name:MOLGRASTIM
- CAS:99283-10-0
- MF:
- Structure:
- Chemical Name:2-(4-Methoxybenzylamino)pyridine
- CAS:52818-63-0
- MF:C13H14N2O
- Structure:
- Chemical Name:3-METHOXY-DL-TYROSINE
- CAS:7636-26-2
- MF:C10H13NO4
- Structure:
- Chemical Name:4-(DIPHENYLMETHOXY)PIPERIDINE
- CAS:58258-01-8
- MF:C18H21NO
- Structure:
- Chemical Name:N,N'-Dipropylurea
- CAS:623-95-0
- MF:C7H16N2O
- Structure:
- Chemical Name:ISOPRENALINE SULFATE
- CAS:6700-39-6
- MF:2C11H17NO3.2H2O.H2O4S
- Structure:
- Chemical Name:Spectinomycin sulfate tetrahydrate
- CAS:64058-48-6
- MF:C14H26N2O11S
- Structure:
- Chemical Name:ACETYLSALICYLSALICYLIC ACID
- CAS:530-75-6
- MF:C16H12O6
- Structure:
- Chemical Name:DIHYDROERGOCRISTINE MESYLATE
- CAS:24730-10-7
- MF:C36H45N5O8S
- Structure:
- Chemical Name:1-Cyanocyclohexaneacetic acid
- CAS:133481-09-1
- MF:C9H13NO2
- Structure:
- Chemical Name:2,4-DIAMINO-6-DIMETHYLAMINO-1,3,5-TRIAZINE
- CAS:1985-46-2
- MF:C5H10N6
- Structure:
- Chemical Name:CAPTOPRIL DISULFIDE
- CAS:64806-05-9
- MF:C18H28N2O6S2
- Structure:
- Chemical Name:alpha-(Dimethylaminomethyl)-alpha-ethylbenzyl alcohol hydrochloride
- CAS:104743-23-9
- MF:C12H20ClNO
- Structure:
- Chemical Name:N-[6,9-Dihydro-6-oxo-9-[[2-(1-oxopropoxy)-1-[(1-oxopropoxy)methyl]ethoxy]methyl]-1H-purin-2-yl]propanamide
- CAS:177216-32-9
- MF:C18H25N5O7
- Structure:
- Chemical Name:5-Bromo-1-(4-fluorophenyl)-1,3-dihydro-N,N-dimethyl-1-isobenzofuranpropanamine ethanedioate (1:1)
- CAS:64372-43-6
- MF:C21H23BrFNO5
- Structure:
- Chemical Name:(E)-2-Methyl-4-(4-(2-Methyl-5,10-dihydro-4H-benzo[b]thieno[2,3-e][1,4]diazepin-4-yl)piperazin-1-yl)-10H-benzo[b]thieno[2,3-e][1,4]diazepine
- CAS:1070876-09-3
- MF:C28H26N6S2
- Structure:
- Chemical Name:(1S,2S,3R,5S)-PinanediolN-BOC-L-phenylalanine-L-leucine boronate
- CAS:1187479-72-6
- MF:C29H45BN2O5
- Structure:
- Chemical Name:Posaconazole iMpurity 7
- CAS:2180759-84-4
- MF:C37H42F2N8O4
- Structure:
- Chemical Name:Intedanib Impurity
- CAS:2243396-74-7
- MF:C31H32N6O6
- Structure:
- Chemical Name:2-BENZYL-1,2,3,6,7,11B-HEXAHYDRO-4H-PYRAZION[2,1-A] ISOQUINOLINE-4-ONE
- CAS:54761-87-4
- MF:C19H18N2O2
- Structure:
- Chemical Name:CHLORHEXIDENE DIACETATE IMPURITY A
- CAS:152504-08-0
- MF:C16H24ClN9
- Chemical Name:AZITHROMYCIN IMPURITY A
- CAS:
- MF:
- Structure:
- Chemical Name:OXELADIN CITRATE
- CAS:52432-72-1
- MF:C20H33NO3.C6H8O7
- Structure:
- Chemical Name:3,4-Dihydro-7-(4-chlorobutoxy)-2(1H)-quinolinone
- CAS:120004-79-7
- MF:C13H16ClNO2
- Chemical Name:Sugammadex sodium Impurity 46
- CAS:
- MF:
- Chemical Name:Tenofovir Impurity 103
- CAS:
- MF:
- Chemical Name:Cabozantinib impurity 44
- CAS:
- MF:
- Chemical Name:Cabozantinib impurity 40
- CAS:
- MF:
- Chemical Name:Cabozantinib impurity 74
- CAS:
- MF:
- Chemical Name:5-hydroxy-N,1,2-trimethyl-1H-indole-3-carboxamide
- CAS:
- MF:
- Chemical Name:Doxofylline Impurity 25
- CAS:
- MF:
- Chemical Name:Dapoxetine impurity 62
- CAS:
- MF:
- Chemical Name:Dapoxetine impurity 56
- CAS:
- MF:
- Structure:
- Chemical Name:D(-)-AMETHOPTERIN
- CAS:51865-79-3
- MF:C20H22N8O5
- Chemical Name:Bimatoprost Impurity 11
- CAS:
- MF:
- Chemical Name:Bimatoprost Impurity 9
- CAS:
- MF:
- Chemical Name:Dolutegravir Impurity 18
- CAS:
- MF:
- Structure:
- Chemical Name:3-(6'-oxo-1'-phenyl-1',6'-dihydro-[2,3'-bipyridin]-5'-yl)benzonitrile
- CAS:380918-53-6
- MF:C23H15N3O
- Chemical Name:Lenvatinib Impurity 33
- CAS:
- MF:
- Structure:
- Chemical Name:isopropyl 2-(2-oxopyrrolidin-1-yl)acetate
- CAS:1249080-59-8
- MF:C9H15NO3
- Chemical Name:Pitavastatin Impurity 71
- CAS:
- MF:
- Chemical Name:Rosuvastatin EP Impurity M Sodium Salt
- CAS:
- MF:
- Chemical Name:Furosemide impurity 8
- CAS:
- MF:
- Chemical Name:Febuxostat Impurity 108
- CAS:
- MF:
- Chemical Name:Flucloxacillin EP Impurity J
- CAS:
- MF:
- Structure:
- Chemical Name:Phosphonic acid, P-[[(1R)-2-(6-amino-9H-purin-9-yl)-1-methylethoxy]methyl]-, mono[(1R)-2-(6-amino-9H-purin-9-yl)-1-methylethyl] ester
- CAS:1878175-77-9
- MF:C17H23N10O4P
- Structure:
- Chemical Name:Acetic acid, 2-[[(1S,2R,4S)-4-[(dimethylamino)carbonyl]-2-[[(4,5,6,7-tetrahydro-5-methylthiazolo[5,4-c]pyridin-2-yl)carbonyl]amino]cyclohexyl]amino]-2-oxo-, ethyl ester
- CAS:480450-85-9
- MF:C21H31N5O5S
- Structure:
- Chemical Name:3H-Oxireno[3,4]pyrrolo[2,1-b][1,3]oxazine-3-butanoic acid, 1b-(4-fluorophenyl)hexahydro-β,7-dihydroxy-7-(1-methylethyl)-1a-phenyl-7a-[(phenylamino)carbonyl]-, (βR,3R)-
- CAS:1193817-52-5
- MF:C33H35FN2O7
- Structure:
- Chemical Name:Hexanoic acid, 3-formyl-, ethyl ester
- CAS:54374-02-6
- MF:C9H16O3
- Structure:
- Chemical Name:D-erythro-Hexonic acid, 2,4-dideoxy-3,5-O-(1-methylethylidene)-
- CAS:154877-92-6
- MF:C9H16O5
- Structure:
- Chemical Name:Linagliptin Dimer impurity (N-C-C-C Dimer)Q: What is Linagliptin Dimer impurity (N-C-C-C Dimer) Q: What is the CAS Number of Linagliptin Dimer impurity (N-C-C-C Dimer)
- CAS:2463617-49-2
- MF:C51H56N16O4
- Structure:
- Chemical Name:Benzoic acid, 4-[(1,3-dihydro-1-hydroxy-2,1-benzoxaborol-5-yl)oxy]-
- CAS:906673-43-6
- MF:C14H11BO5
- Structure:
- Chemical Name:Benzenemethanamine, α,α'-sulfonylbis(methylene)bis[3-ethoxy-4-methoxy-
- CAS:2417213-71-7
- MF:C22H32N2O6S
- Structure:
- Chemical Name:1H-Purine-2,6-dione, 8-(3-amino-1-piperidinyl)-7-(3-chloro-2-buten-1-yl)-3,7-dihydro-3-methyl-1-[(4-methyl-2-quinazolinyl)methyl]-
- CAS:2138805-26-0
- MF:C25H29ClN8O2
- Structure:
- Chemical Name:1,3-Benzenedicarboxamide, 5-[acetyl(2,3-dihydroxypropyl)amino]-N1,N3-bis(2,3-dihydroxypropyl)-2,4-diiodo-
- CAS:1651211-78-7
- MF:C19H27I2N3O9
- Chemical Name:(E)-1-(4-(2-carboxyvinyl)benzyl)-1H-imidazole 3-oxide
- CAS:
- MF:
- Chemical Name:Aprepitant impurity 2
- CAS:
- MF:
- Chemical Name:Aprepitant impurity 4
- CAS:
- MF:
- Chemical Name:Vonoprazan Impurity B-2
- CAS:
- MF:
- Structure:
- Chemical Name:2-(Cyanomethylthio)acetic acid
- CAS:55817-29-3
- MF:C4H5NO2S
- Structure:
- Chemical Name:2(1H)-Pyridinone, 1-(3-aminophenyl)-5,6-dihydro-3-(4-morpholinyl)-
- CAS:2437650-75-2
- MF:C15H19N3O2
- Structure:
- Chemical Name:4(1H)-Pyridinone, 1-(6-methoxy-1H-benzimidazol-2-yl)-2,3,5-trimethyl-
- CAS:2512216-37-2
- MF:C16H17N3O2
- Chemical Name:Budesonide Impurity 31
- CAS:
- MF:
- Chemical Name:Budesonide Impurity 23
- CAS:
- MF:
- Structure:
- Chemical Name:Hexanoic acid, 3-(chloromethyl)-, (3R)-
- CAS:2101641-90-9
- MF:C7H13ClO2
- Structure:
- Chemical Name:Bisoprolol Impurity
- CAS:2226263-68-7
- MF:C18H31NO4
- Chemical Name:Oseltamivir Impurity 94
- CAS:
- MF:
- Chemical Name:Oseltamivir Impurity 82
- CAS:
- MF:
- Chemical Name:Oseltamivir Impurity 74
- CAS:
- MF:
- Structure:
- Chemical Name:Uridine, 5'-(2-methylpropanoate) (9CI)
- CAS:886538-48-3
- MF:C13H18N2O7
- Chemical Name:Dapagliflozin Impurity 47
- CAS:
- MF:
- Chemical Name:Crisaborole Impurity 17
- CAS:
- MF:
- Chemical Name:Crisaborole Impurity 19
- CAS:
- MF:
- Structure:
- Chemical Name:1,5-Pentanedione, 1-(2-fluorophenyl)-5-[(4S)-2-oxo-4-phenyl-3-oxazolidinyl]-
- CAS:2514695-40-8
- MF:C20H18FNO4
- Structure:
- Chemical Name:4-ethoxy-3-(4-pyridyl)-3-buten-2-one
- CAS:88349-61-5
- MF:C11H13NO2
- Structure:
- Chemical Name:1,3-dihydro-4-methyl-2H-1,5-benzodiazepin-2-one
- CAS:6276-48-8
- MF:C10H10N2O
- Structure:
- Chemical Name:(E)-2-methoxy-4-(prop-1-enyl)phenol
- CAS:5932-68-3
- MF:C10H12O2
- Structure:
- Chemical Name:3-amino-5-[(methylthio)methyl]oxazolidin-2-one
- CAS:25517-72-0
- MF:C5H10N2O2S