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Pharmaceutical Impurity Reference Standards

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Structure Chemical Name CAS MF
Olaparib Impurity 4 Olaparib Impurity 4
Paclitaxel EP Impurity M Paclitaxel EP Impurity M
Parecoxib Sodium Impurity H Parecoxib Sodium Impurity H 501093-49-8 C16H14N2O4S
Posaconazole Impurity 10 Posaconazole Impurity 10
Posaconazole Impurity 63 Posaconazole Impurity 63 208187-15-9 C20H26F2O4
(S)-4,5,6,7-Tetrahydro-N2,N6-propionyl-2,6-benzothiazolediaMine (S)-4,5,6,7-Tetrahydro-N2,N6-propionyl-2,6-benzothiazolediaMine 1373869-91-0 C11H17N3O2
SofosBuvir impurity 62 SofosBuvir impurity 62
Tamoxifen EP Impurity E Tamoxifen EP Impurity E C26H29NO
Tenofovir impurity P Tenofovir impurity P
Tirofiban Impurity 3 Tirofiban Impurity 3 1346918-32-8 C13H19NO5S
Trelagliptin Impurity 19 Trelagliptin Impurity 19
N-((3R,4R)-1-(2-cyanoacetyl)-4-methylpiperidin-3-yl)-N-methyl-7H-pyrrolo[2,3-d]pyrimidin-4-amine oxide N-((3R,4R)-1-(2-cyanoacetyl)-4-methylpiperidin-3-yl)-N-methyl-7H-pyrrolo[2,3-d]pyrimidin-4-amine oxide 2028267-73-2 C16H20N6O2
D-Glucitol, 1,5-anhydro-1-C-[4-chloro-3-[(4-methoxyphenyl)methyl]phenyl]-, (1S)- D-Glucitol, 1,5-anhydro-1-C-[4-chloro-3-[(4-methoxyphenyl)methyl]phenyl]-, (1S)- 333359-90-3 C20H23ClO6
Flucloxacillin Sodium Impurity E Flucloxacillin Sodium Impurity E
Amifostine Impurity 1 Amifostine Impurity 1
Clindamycin Phosphate EP Impurity H Clindamycin Phosphate EP Impurity H
2-Thia-5-azabicyclo[2.2.1]heptane-5-carboxylic acid, 3-oxo-, (4-nitrophenyl)methyl ester, (1S,4S)- 2-Thia-5-azabicyclo[2.2.1]heptane-5-carboxylic acid, 3-oxo-, (4-nitrophenyl)methyl ester, (1S,4S)- 151072-00-3 C13H12N2O5S
Brexpiprazole Impurity Brexpiprazole Impurity 2116542-21-1 C38H40N4O4S
4-(1-(2,3-dimethylphenyl)propyl)-1H-imidazole 4-(1-(2,3-dimethylphenyl)propyl)-1H-imidazole 86347-62-8 C14H18N2
Atomoxetine EP Impurity A Atomoxetine EP Impurity A 873310-33-9 C16H20ClNO
Famciclovir Impurity 12 Famciclovir Impurity 12 122497-20-5 C12H15N5O4
Levofloxacin Impurity 22 Levofloxacin Impurity 22 177472-29-6 C20H25F2N3O4
Methylprednisolone EP Impurity E Methylprednisolone EP Impurity E 229019-44-7 C21H28O4
Pantoprazole Impurity 1 Pantoprazole Impurity 1 812664-93-0 C16H14ClF2N3O4S
Ticagrelor Related Compound 38D-Tartrate Ticagrelor Related Compound 38D-Tartrate 2165881-71-8 C10H19NO4
1-(1-BENZOTHIOPHEN-7-YL)PIPERAZINE 1-(1-BENZOTHIOPHEN-7-YL)PIPERAZINE 105685-06-1 C12H14N2S
4-methyl-N-(2-methyl-5-nitrophenyl)-6-(pyridin-3-yl)pyrimidin-2-amine 4-methyl-N-(2-methyl-5-nitrophenyl)-6-(pyridin-3-yl)pyrimidin-2-amine C17H15N5O2
Afatinib Impurity 21 Afatinib Impurity 21 2044709-72-8 C18H16F2N4O2
trans-Carboprost trans-Carboprost 76498-29-8 C21H36O5
N-[[2-(1H-Tetrazol-5-Yl)[1,1-Biphenyl]-4-Yl]Methyl]Amine(WXC00176) N-[[2-(1H-Tetrazol-5-Yl)[1,1-Biphenyl]-4-Yl]Methyl]Amine(WXC00176) 147225-68-1 C14H13N5
MFFANMLJBOSKIX-UHFFFAOYSA-N MFFANMLJBOSKIX-UHFFFAOYSA-N 352457-34-2 C9H13N5O2
4,4',4''-Methylidenetrisbenzonitrile 4,4',4''-Methylidenetrisbenzonitrile 113402-31-6 C22H13N3
methyl (2E)-3-(methylamino)but-2-enoate methyl (2E)-3-(methylamino)but-2-enoate 21759-69-3 C6H11NO2
Entecavir Impurity 5 Entecavir Impurity 5 84868-56-4 C21H20O2
Bisoprolol-d5 Bisoprolol-d5 1189881-87-5 C18H31NO4
4-(2-HYDROXY-3-ISOPROPYLAMINO-PROPOXY)-BENZOIC ACID METHYL ESTER 4-(2-HYDROXY-3-ISOPROPYLAMINO-PROPOXY)-BENZOIC ACID METHYL ESTER 33947-97-6 C14H21NO4
3-[[4-[2-(2H-tetrazol-5-yl)phenyl]phenyl]methyl]-2-[1-[4-[2-(2H-tetrazol-5-yl)phenyl]phenyl]pentan-2-yl]-1,3-diazaspiro[4.4]non-1-en-4-one 3-[[4-[2-(2H-tetrazol-5-yl)phenyl]phenyl]methyl]-2-[1-[4-[2-(2H-tetrazol-5-yl)phenyl]phenyl]pentan-2-yl]-1,3-diazaspiro[4.4]non-1-en-4-one 1346598-52-4 C39H38N10O
5-METHYL-3-NITROMETHYL-HEXANOIC ACID 5-METHYL-3-NITROMETHYL-HEXANOIC ACID 181289-21-4 C8H15NO4
4(3,4-DICHLOROPHENYL)1,2,3,4-TETRAHYDRO-N-METHYL-1-NAPHTHALENE AMINE RACEMATE 4(3,4-DICHLOROPHENYL)1,2,3,4-TETRAHYDRO-N-METHYL-1-NAPHTHALENE AMINE RACEMATE 140631-53-4 C17H17Cl2N
(3R,5R)-tert-butyl 7-(2,3-bis(4-fluorophenyl)-5-isopropyl-4-(phenylcarbamoyl)-1H-pyrrol-1-yl)-3,5-dihydroxyheptanoate (3R,5R)-tert-butyl 7-(2,3-bis(4-fluorophenyl)-5-isopropyl-4-(phenylcarbamoyl)-1H-pyrrol-1-yl)-3,5-dihydroxyheptanoate 2588261-40-7 C37H42F2N2O5
(S)-ethyl 2-(4-hydroxy-2-oxopyrrolidin-1-yl)acetate (S)-ethyl 2-(4-hydroxy-2-oxopyrrolidin-1-yl)acetate 870695-39-9 C8H13NO4
4-(3-(4-(cyclopropanecarbonyl)piperazine-1-carbonyl)-4-hydroxybenzyl)phthalazin-1(2H)-one 4-(3-(4-(cyclopropanecarbonyl)piperazine-1-carbonyl)-4-hydroxybenzyl)phthalazin-1(2H)-one C24H24N4O4
Diquafosol Impurity 2 Diquafosol Impurity 2 63785-59-1 C18H25N4O20P3
N-((3R,4R)-1-benzyl-4-methylpiperidin-3-yl)-2,2'-dichloro-N-methyl-7H-[4,7'-bipyrrolo[2,3-d]pyrimidin]-4'-amine N-((3R,4R)-1-benzyl-4-methylpiperidin-3-yl)-2,2'-dichloro-N-methyl-7H-[4,7'-bipyrrolo[2,3-d]pyrimidin]-4'-amine 2459302-87-3 C26H26Cl2N8
(1R,3R)-1-(benzo[d][1,3]dioxol-5-yl)-2-(2,2-dichloroacetyl) -2,3,4,9-tetrahydro-1H-pyrido[3,4-b]indole-3-carboxylate (1R,3R)-1-(benzo[d][1,3]dioxol-5-yl)-2-(2,2-dichloroacetyl) -2,3,4,9-tetrahydro-1H-pyrido[3,4-b]indole-3-carboxylate 1598416-08-0 C22H18Cl2N2O5
PANTOPRAZOLE N-OXIDE SODIUM SALT PANTOPRAZOLE N-OXIDE SODIUM SALT 1279822-90-0 C16H16F2N3NaO5S
3-HYDROXY-THIOBENZAMIDE 3-HYDROXY-THIOBENZAMIDE 104317-54-6 C7H7NOS
Tadalafil impurity 38 Tadalafil impurity 38 185750-07-6 C14H15ClN2O3
Fulvestrant impurity H Fulvestrant impurity H
Trans-5-(Benzyloxyamino)piperidine-2-carboxylic acid,sodium salt Trans-5-(Benzyloxyamino)piperidine-2-carboxylic acid,sodium salt 2122800-38-6 C13H19N2NaO3
1-(5-(2-fluorophenyl)-1-(pyridin-2-ylsulfonyl)-1H-pyrrol-3-yl)-N- methylmethanamine fumarate 1-(5-(2-fluorophenyl)-1-(pyridin-2-ylsulfonyl)-1H-pyrrol-3-yl)-N- methylmethanamine fumarate 928615-46-7 C17H16FN3O2S
2-METHYLPYRAZINE 1,4-DIOXIDE 2-METHYLPYRAZINE 1,4-DIOXIDE 32046-26-7 C5H6N2O2
4-AMINO-1-METHYL-5-PROPYL-1H-PYRAZOLE-3-CARBOXYLIC ACID AMIDE 4-AMINO-1-METHYL-5-PROPYL-1H-PYRAZOLE-3-CARBOXYLIC ACID AMIDE 247583-78-4 C8H14N4O
CAPECITABINE-D11 CAPECITABINE-D11 1132662-08-8 C15H13D11FN3O6
Bendamustine Related Impurity 2 Bendamustine Related Impurity 2
Bendamustine Related Impurity 7 Bendamustine Related Impurity 7
Bortezomib Impurity 25 Bortezomib Impurity 25
Bortezomib Impurity 40 Bortezomib Impurity 40
Edoxaban Impurity 28 (1R,2R,4R) Edoxaban Impurity 28 (1R,2R,4R) 1255529-38-4 C21H30ClN5O5
Linagliptin Impurity 31 Linagliptin Impurity 31
Olopatadine Impurity 1 Olopatadine Impurity 1 66801-40-9 C15H10O4
Paroxetine Impurity 12 Paroxetine Impurity 12
Rivaroxaban Impurity 69 DiHCl Rivaroxaban Impurity 69 DiHCl
Sitafloxacin Impurity 5 Sitafloxacin Impurity 5 1630983-99-1 C15H12ClF4NO3
Ticagrelor Related Compound 92 Ticagrelor Related Compound 92
Valsartan Impurity 10 Valsartan Impurity 10 1314799-74-0 C23H29N5O
Vonoprazan Impurity 23 Vonoprazan Impurity 23
Adefovir Impurity 1 Adefovir Impurity 1
Bendamustine Impurity G Bendamustine Impurity G
Blonanserin Impurity K Blonanserin Impurity K
Brexpiprazole Impurity F Brexpiprazole Impurity F
Cefazolin USP Impurity D Cefazolin USP Impurity D
Cefuroxime Impurity 9 Cefuroxime Impurity 9 2165460-37-5 C8H10N2O4S
Everolimus Impurity E Everolimus Impurity E
Peramivir Impurity 3 Peramivir Impurity 3
Peramivir Impurity 8 Peramivir Impurity 8
Pitavastatin Impurity 13 Pitavastatin Impurity 13
Pramipexole Impurity R Pramipexole Impurity R
Tadalafil Impuirty 21 Tadalafil Impuirty 21
Abacavir Abacavir 141271-12-7 C10H14ClN5O
Canagliflozin Impurity 42 Canagliflozin Impurity 42
Maleic Acid Maleic Acid 2170020-79-6 C21H20FN3O6S
Ozagrel Impurity 21 Ozagrel Impurity 21 883942-98-1 C23H20N2O4
Terbutaline Impurity Terbutaline Impurity 1226543-90-3 C22H20O4
lidocaine impurity lidocaine impurity 1374010-02-2 C30H36N4O3
Desloratadine Impurity 7 Desloratadine Impurity 7
Esomeprazole Impurity 28 Esomeprazole Impurity 28
ethyl 2-(3-carbamoyl-4-isobutoxyphenyl)-4-methylthiazole-5- carboxylate ethyl 2-(3-carbamoyl-4-isobutoxyphenyl)-4-methylthiazole-5- carboxylate 1346238-15-0 C18H22N2O4S
Ropivacaine impurity Ropivacaine impurity 1786518-57-7 C13H16N2O3
Mono Oxidation Sugammadex(Org199425-1) Mono Oxidation Sugammadex(Org199425-1) 2412953-14-9 C72H113NaO49S8
Moxifloxacin Impurity 40 Moxifloxacin Impurity 40 121577-35-3 C15H16F3NO4
sodium 2-(((3,4-dimethoxypyridin-2-yl)methyl)thio)-5- hydroxy-4-sulfonatobenzo[d]imidazol-1-ide sodium 2-(((3,4-dimethoxypyridin-2-yl)methyl)thio)-5- hydroxy-4-sulfonatobenzo[d]imidazol-1-ide C15H13N3Na2O6S2
Dexmedetomidine-007 Dexmedetomidine-007 2240179-63-7 C13H16N2
2-(5-methyl-4-phenylisoxazol-3-yl)benzenesulfonamide 2-(5-methyl-4-phenylisoxazol-3-yl)benzenesulfonamide 2304623-37-6 C16H14N2O3S
4,4′-DIPHENOQUINONE (DQ) 4,4′-DIPHENOQUINONE (DQ) 494-72-4 C12H8O2
S-(+)-O-DESMETHYL VENLAFAXINE S-(+)-O-DESMETHYL VENLAFAXINE 142761-12-4 C16H25NO2
ACETYLSIMVASTATIN ACETYLSIMVASTATIN 145576-25-6 C27H40O6
5-[2-(4'-METHYLBIPHENYL)]TETRAZOLE 5-[2-(4'-METHYLBIPHENYL)]TETRAZOLE 120568-11-8 C14H12N4
L-2-Aminobutanamide L-2-Aminobutanamide 7324-11-0 C4H10N2O
FUROSEMIDE IMPURITY A FUROSEMIDE IMPURITY A C12H11ClN2O5S
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