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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
1-Isobutyl-4-piperidone 1-Isobutyl-4-piperidone 72544-16-2 C9H17NO
Fluphenazine decanoate Fluphenazine decanoate 5002-47-1 C32H44F3N3O2S
Formoterol fumarate dihydrate Formoterol fumarate dihydrate 183814-30-4 C23H28N2O8
Chloramphenicol sodium succinate Chloramphenicol sodium succinate 982-57-0 C15H15Cl2N2O8.Na
GUANERAN GUANERAN 5581-52-2 C9H8N8O2S
BENZATHINE PENICILLINE G TETRAHYDRATE BENZATHINE PENICILLINE G TETRAHYDRATE 41372-02-5 C32H38N4O4S
4-(4-Chloro-benzyl)-2H-phthalazin-1-one 4-(4-Chloro-benzyl)-2H-phthalazin-1-one 53242-88-9 C15H11ClN2O
Milbemycin oxime Milbemycin oxime 129496-10-2 2C32H45NO7.2C31H43NO7
2,6-DIMETHYL-4-NITROSOPHENOL 2,6-DIMETHYL-4-NITROSOPHENOL 14818-35-0 C12H16O2
ALPRENOLOL HYDROCHLORIDE ALPRENOLOL HYDROCHLORIDE 13707-88-5 C15H24ClNO2
4-BUTYL-4-[HYDROXYMETHYL]-1,2-DIPHENYL-3,5-PYRAZOLIDINEDIONE HYDROGEN SUCCINATE [ESTER] 4-BUTYL-4-[HYDROXYMETHYL]-1,2-DIPHENYL-3,5-PYRAZOLIDINEDIONE HYDROGEN SUCCINATE [ESTER] 27470-51-5 C24H26N2O6
ENTEROKINASE ENTEROKINASE 9014-74-8 NULL
CHONDROITIN SULFATE B SODIUM SALT CHONDROITIN SULFATE B SODIUM SALT 54328-33-5 NULL
Calcium levulinate dihydrate Calcium levulinate dihydrate 5743-49-7 C10H18CaO8
alpha-Ethyl-2-oxo-1-pyrrolidineacetic acid alpha-Ethyl-2-oxo-1-pyrrolidineacetic acid 67118-31-4 C8H13NO3
Piretanide Piretanide 55837-27-9 C17H18N2O5S
Potassium trichloroammineplatinate (II) Potassium trichloroammineplatinate (II) 13820-91-2 Cl3H3KNPt
DOTHIEPIN HCL DOTHIEPIN HCL 897-15-4 C19H22ClNS
Rilmenidine phosphate Rilmenidine phosphate 85409-38-7 C10H19N2O5P
Disodium clodronate tetrahydrate Disodium clodronate tetrahydrate 88416-50-6 CH7Cl2NaO7P2
Framycetin sulphate Framycetin sulphate 4146-30-9 C23H48N6O17S
MOLGRASTIM MOLGRASTIM 99283-10-0
2-(4-Methoxybenzylamino)pyridine 2-(4-Methoxybenzylamino)pyridine 52818-63-0 C13H14N2O
3-METHOXY-DL-TYROSINE 3-METHOXY-DL-TYROSINE 7636-26-2 C10H13NO4
4-(DIPHENYLMETHOXY)PIPERIDINE 4-(DIPHENYLMETHOXY)PIPERIDINE 58258-01-8 C18H21NO
N,N'-Dipropylurea N,N'-Dipropylurea 623-95-0 C7H16N2O
ISOPRENALINE SULFATE ISOPRENALINE SULFATE 6700-39-6 2C11H17NO3.2H2O.H2O4S
Spectinomycin sulfate tetrahydrate Spectinomycin sulfate tetrahydrate 64058-48-6 C14H26N2O11S
ACETYLSALICYLSALICYLIC ACID ACETYLSALICYLSALICYLIC ACID 530-75-6 C16H12O6
DIHYDROERGOCRISTINE MESYLATE DIHYDROERGOCRISTINE MESYLATE 24730-10-7 C36H45N5O8S
1-Cyanocyclohexaneacetic acid 1-Cyanocyclohexaneacetic acid 133481-09-1 C9H13NO2
2,4-DIAMINO-6-DIMETHYLAMINO-1,3,5-TRIAZINE 2,4-DIAMINO-6-DIMETHYLAMINO-1,3,5-TRIAZINE 1985-46-2 C5H10N6
CAPTOPRIL DISULFIDE CAPTOPRIL DISULFIDE 64806-05-9 C18H28N2O6S2
2-BENZYL-1,2,3,6,7,11B-HEXAHYDRO-4H-PYRAZION[2,1-A] ISOQUINOLINE-4-ONE 2-BENZYL-1,2,3,6,7,11B-HEXAHYDRO-4H-PYRAZION[2,1-A] ISOQUINOLINE-4-ONE 54761-87-4 C19H18N2O2
(+/-)-tert-Butyl 6-Chloro-5-hydroxy-3-oxohexanoate (+/-)-tert-Butyl 6-Chloro-5-hydroxy-3-oxohexanoate 319924-73-7 C10H17ClO4
(R)-2-(2-aminothiazol-4-yl)-N-(2-(2-((2-hydroxy-2-phenylethyl)amino)ethyl)phenyl)acetamide (R)-2-(2-aminothiazol-4-yl)-N-(2-(2-((2-hydroxy-2-phenylethyl)amino)ethyl)phenyl)acetamide 1684452-80-9 C21H24N4O2S
1,4-Dihydro-2,6-dimethyl-4-(3-nitrophenyl)-3,5-pyridinedicarboxylic Acid 3-[2-[(3,3-Diphenylpropyl)methylamino]-1,1-dimethylethyl] 5-ethyl Ester Hydrochloride 1,4-Dihydro-2,6-dimethyl-4-(3-nitrophenyl)-3,5-pyridinedicarboxylic Acid 3-[2-[(3,3-Diphenylpropyl)methylamino]-1,1-dimethylethyl] 5-ethyl Ester Hydrochloride 210579-71-8 C37H44ClN3O6
2-chloro-5-(2-fluorophenyl)-1H-pyrrole-3-carbaldehyde 2-chloro-5-(2-fluorophenyl)-1H-pyrrole-3-carbaldehyde 2169267-53-0 C11H7ClFNO
4-(4-(4-(4-(((3S,5S)-5-((1H-1,2,4-triazol-1-yl)methyl)-5-(2,4-difluorophenyl)tetrahydrofuran-3-yl)methoxy)phenyl)piperazin-1-yl)phenyl)-1-((2R,3S)-2-hydroxypentan-3-yl)-1H-1,2,4-triazol-5(4H)-one 4-(4-(4-(4-(((3S,5S)-5-((1H-1,2,4-triazol-1-yl)methyl)-5-(2,4-difluorophenyl)tetrahydrofuran-3-yl)methoxy)phenyl)piperazin-1-yl)phenyl)-1-((2R,3S)-2-hydroxypentan-3-yl)-1H-1,2,4-triazol-5(4H)-one 2243785-99-9 C37H42F2N8O4
5-(2-fluorophenyl)-N-methyl-1-(pyridin-3-ylsulfonyl)-1H-pyrrole-3-carboxamide 5-(2-fluorophenyl)-N-methyl-1-(pyridin-3-ylsulfonyl)-1H-pyrrole-3-carboxamide 2054536-04-6 C17H14FN3O3S
Ozagrel Impurity 10 Ozagrel Impurity 10
tris((5-(2-fluorophenyl)-1H-pyrrol-3-yl)methyl)amine tris((5-(2-fluorophenyl)-1H-pyrrol-3-yl)methyl)amine C33H27F3N4
Esmolol impurity C Esmolol impurity C
OXELADIN CITRATE OXELADIN CITRATE 52432-72-1 C20H33NO3.C6H8O7
3,4-Dihydro-7-(4-chlorobutoxy)-2(1H)-quinolinone 3,4-Dihydro-7-(4-chlorobutoxy)-2(1H)-quinolinone 120004-79-7 C13H16ClNO2
Sugammadex sodium Impurity 46 Sugammadex sodium Impurity 46
Tenofovir Impurity 103 Tenofovir Impurity 103
Cabozantinib impurity 44 Cabozantinib impurity 44
Cabozantinib impurity 40 Cabozantinib impurity 40
Cabozantinib impurity 74 Cabozantinib impurity 74
5-hydroxy-N,1,2-trimethyl-1H-indole-3-carboxamide 5-hydroxy-N,1,2-trimethyl-1H-indole-3-carboxamide
Doxofylline Impurity 25 Doxofylline Impurity 25
Dapoxetine impurity 62 Dapoxetine impurity 62
Dapoxetine impurity 56 Dapoxetine impurity 56
2H-3-Benzazepin-2-one, 3-[3-[[[(7S)-3,4-dimethoxybicyclo[4.2.0]octa-1,3,5-trien-7-yl]methyl]methylamino]propyl]-1,3,4,5-tetrahydro-5-hydroxy-7,8-dimethoxy- 2H-3-Benzazepin-2-one, 3-[3-[[[(7S)-3,4-dimethoxybicyclo[4.2.0]octa-1,3,5-trien-7-yl]methyl]methylamino]propyl]-1,3,4,5-tetrahydro-5-hydroxy-7,8-dimethoxy- 2253977-80-7 C27H36N2O6
Benzeneacetic acid, 3-[1-hydroxy-4-[4-(hydroxydiphenylmethyl)-1-piperidinyl]butyl]-α,α-dimethyl-, methyl ester Benzeneacetic acid, 3-[1-hydroxy-4-[4-(hydroxydiphenylmethyl)-1-piperidinyl]butyl]-α,α-dimethyl-, methyl ester 1187954-56-8 C33H41NO4
N-[2-(methylthio)ethyl]-2-[(3,3,3-trifluoropropyl)thio]-Adenosine 5''-(hydrogen P-1H-imidazol-1-ylphosphonate) N-[2-(methylthio)ethyl]-2-[(3,3,3-trifluoropropyl)thio]-Adenosine 5''-(hydrogen P-1H-imidazol-1-ylphosphonate) 1054332-15-8 C19H25F3N7O6PS2
N-[5-(4-Bromophenyl)-6-[2-(2-pyrimidinyloxy)ethoxy]-4-pyrimidinyl]-N''-propyl-sulfamide N-[5-(4-Bromophenyl)-6-[2-(2-pyrimidinyloxy)ethoxy]-4-pyrimidinyl]-N''-propyl-sulfamide 2211059-00-4 C19H21BrN6O4S
Isomer 1 of Tazobactam Impurity 3 Isomer 1 of Tazobactam Impurity 3
Ceftiofur USP Impurity I Ceftiofur USP Impurity I
Cephalexin Degradation Impurity A Cephalexin Degradation Impurity A
Azlocillin Impurity 8 Azlocillin Impurity 8
Pregabalin-8687（mixture of 4 isomers） Pregabalin-8687（mixture of 4 isomers）
7-(2-chloropropanoyl)-5H-chromeno[2,3-b]pyridin-5-one 7-(2-chloropropanoyl)-5H-chromeno[2,3-b]pyridin-5-one
1-(5H-chromeno[2,3-b]pyridin-7-yl)-2-methoxypropan-1-one 1-(5H-chromeno[2,3-b]pyridin-7-yl)-2-methoxypropan-1-one
(E)-4-chloro-6-(3-(2,4-difluorophenyl)-4-(1H-1,2,4-triazol-1-yl)but-3-en-2-yl)-5-fluoropyrimidine (E)-4-chloro-6-(3-(2,4-difluorophenyl)-4-(1H-1,2,4-triazol-1-yl)but-3-en-2-yl)-5-fluoropyrimidine
Dolutegravir Impurity C Dolutegravir Impurity C 1802141-49-6 C22H23F2N3O5
Adefovir Dipivoxil Impurity 24 Adefovir Dipivoxil Impurity 24 116384-58-8 C14H23O7PS
Dapoxetine Impurity 68 Dapoxetine Impurity 68 119357-48-1 C19H18O
Tobramycin Impurity Tobramycin Impurity 74501-86-3 C18H35N5O8
Peramivir Impurity 24 Peramivir Impurity 24
2-CHLORO-6-AMINO-9-(2',3',5'-TRI-O-ACETYL--D-RIBOFURANOSYL)PURINE 2-CHLORO-6-AMINO-9-(2',3',5'-TRI-O-ACETYL--D-RIBOFURANOSYL)PURINE 79999-39-6 C16H18ClN5O7
Bimatoprost Impurity 11 Bimatoprost Impurity 11
Bimatoprost Impurity 9 Bimatoprost Impurity 9
Dolutegravir Impurity 18 Dolutegravir Impurity 18
3-(6'-oxo-1'-phenyl-1',6'-dihydro-[2,3'-bipyridin]-5'-yl)benzonitrile 3-(6'-oxo-1'-phenyl-1',6'-dihydro-[2,3'-bipyridin]-5'-yl)benzonitrile 380918-53-6 C23H15N3O
Lenvatinib Impurity 33 Lenvatinib Impurity 33
isopropyl 2-(2-oxopyrrolidin-1-yl)acetate isopropyl 2-(2-oxopyrrolidin-1-yl)acetate 1249080-59-8 C9H15NO3
Pitavastatin Impurity 71 Pitavastatin Impurity 71
Rosuvastatin EP Impurity M Sodium Salt Rosuvastatin EP Impurity M Sodium Salt
Furosemide impurity 8 Furosemide impurity 8
Febuxostat Impurity 108 Febuxostat Impurity 108
Flucloxacillin EP Impurity J Flucloxacillin EP Impurity J
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 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 1878175-77-9 C17H23N10O4P
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 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 480450-85-9 C21H31N5O5S
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)- 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)- 1193817-52-5 C33H35FN2O7
Hexanoic acid, 3-formyl-, ethyl ester Hexanoic acid, 3-formyl-, ethyl ester 54374-02-6 C9H16O3
D-erythro-Hexonic acid, 2,4-dideoxy-3,5-O-(1-methylethylidene)- D-erythro-Hexonic acid, 2,4-dideoxy-3,5-O-(1-methylethylidene)- 154877-92-6 C9H16O5
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) 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) 2463617-49-2 C51H56N16O4
Benzoic acid, 4-[(1,3-dihydro-1-hydroxy-2,1-benzoxaborol-5-yl)oxy]- Benzoic acid, 4-[(1,3-dihydro-1-hydroxy-2,1-benzoxaborol-5-yl)oxy]- 906673-43-6 C14H11BO5
Benzenemethanamine, α,α'-sulfonylbis(methylene)bis[3-ethoxy-4-methoxy- Benzenemethanamine, α,α'-sulfonylbis(methylene)bis[3-ethoxy-4-methoxy- 2417213-71-7 C22H32N2O6S
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]- 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]- 2138805-26-0 C25H29ClN8O2
1,3-Benzenedicarboxamide, 5-[acetyl(2,3-dihydroxypropyl)amino]-N1,N3-bis(2,3-dihydroxypropyl)-2,4-diiodo- 1,3-Benzenedicarboxamide, 5-[acetyl(2,3-dihydroxypropyl)amino]-N1,N3-bis(2,3-dihydroxypropyl)-2,4-diiodo- 1651211-78-7 C19H27I2N3O9
(2S,3R,4R,5S,6R)-2-(4-chloro-3-(4-ethoxy-3-ethylbenzyl)phenyl)-6-(hydroxymethyl)tetrahydro-2H-pyran-3,4,5-triol (2S,3R,4R,5S,6R)-2-(4-chloro-3-(4-ethoxy-3-ethylbenzyl)phenyl)-6-(hydroxymethyl)tetrahydro-2H-pyran-3,4,5-triol
(E)-1-(4-(2-carboxyvinyl)benzyl)-1H-imidazole 3-oxide (E)-1-(4-(2-carboxyvinyl)benzyl)-1H-imidazole 3-oxide
Aprepitant impurity 2 Aprepitant impurity 2
Aprepitant impurity 4 Aprepitant impurity 4
Vonoprazan Impurity B-2 Vonoprazan Impurity B-2
2-(Cyanomethylthio)acetic acid 2-(Cyanomethylthio)acetic acid 55817-29-3 C4H5NO2S
2(1H)-Pyridinone, 1-(3-aminophenyl)-5,6-dihydro-3-(4-morpholinyl)- 2(1H)-Pyridinone, 1-(3-aminophenyl)-5,6-dihydro-3-(4-morpholinyl)- 2437650-75-2 C15H19N3O2
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