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Pharmaceutical Impurity Reference Standards

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Structure Chemical Name CAS MF
Clopamide Clopamide 636-54-4 C14H20ClN3O3S
1-Isobutyl-4-piperidone 1-Isobutyl-4-piperidone 72544-16-2 C9H17NO
(R*,R*)-N-[2-Hydroxy-5-[1-hydroxy-2-[[2-(4-methoxyphenyl)-1-methylethyl]amino]ethyl]phenyl]formamide fumarate dihydrate (R*,R*)-N-[2-Hydroxy-5-[1-hydroxy-2-[[2-(4-methoxyphenyl)-1-methylethyl]amino]ethyl]phenyl]formamide fumarate dihydrate 183814-30-4 C23H28N2O8
Chloramphenicol sodium succinate Chloramphenicol sodium succinate 982-57-0 C15H15Cl2N2O8.Na
GUANERAN GUANERAN 5581-52-2 C9H8N8O2S
Fluphenazine decanoate Fluphenazine decanoate 5002-47-1 C32H44F3N3O2S
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
DOTHIEPIN HCL DOTHIEPIN HCL 897-15-4 C19H22ClNS
2,6-DIMETHYL-4-NITROSOPHENOL 2,6-DIMETHYL-4-NITROSOPHENOL 14818-35-0 C12H16O2
Milbemycin oxime Milbemycin oxime 129496-10-2 2C32H45NO7.2C31H43NO7
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
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
Rilmenidine phosphate Rilmenidine phosphate 85409-38-7 C10H19N2O5P
LEVULINIC ACID CALCIUM SALT DIHYDRATE LEVULINIC ACID CALCIUM SALT DIHYDRATE 5743-49-7 C10H18CaO8
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
Salmeterol Related Compound B (10 mg) (4-{1-Hydroxy-2-[6-(4-phenylbutan-2-yloxy)hexylamino]ethyl}-2-(hydroxymethyl)phenol) Salmeterol Related Compound B (10 mg) (4-{1-Hydroxy-2-[6-(4-phenylbutan-2-yloxy)hexylamino]ethyl}-2-(hydroxymethyl)phenol) 108928-81-0 C25H37NO4
alpha-(Dimethylaminomethyl)-alpha-ethylbenzyl alcohol hydrochloride alpha-(Dimethylaminomethyl)-alpha-ethylbenzyl alcohol hydrochloride 104743-23-9 C12H20ClNO
N-[6,9-Dihydro-6-oxo-9-[[2-(1-oxopropoxy)-1-[(1-oxopropoxy)methyl]ethoxy]methyl]-1H-purin-2-yl]propanamide N-[6,9-Dihydro-6-oxo-9-[[2-(1-oxopropoxy)-1-[(1-oxopropoxy)methyl]ethoxy]methyl]-1H-purin-2-yl]propanamide 177216-32-9 C18H25N5O7
5-Bromo-1-(4-fluorophenyl)-1,3-dihydro-N,N-dimethyl-1-isobenzofuranpropanamine ethanedioate (1:1) 5-Bromo-1-(4-fluorophenyl)-1,3-dihydro-N,N-dimethyl-1-isobenzofuranpropanamine ethanedioate (1:1) 64372-43-6 C21H23BrFNO5
(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 (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 1070876-09-3 C28H26N6S2
(1S,2S,3R,5S)-PinanediolN-BOC-L-phenylalanine-L-leucine boronate (1S,2S,3R,5S)-PinanediolN-BOC-L-phenylalanine-L-leucine boronate 1187479-72-6 C29H45BN2O5
Posaconazole iMpurity 7 Posaconazole iMpurity 7 2180759-84-4 C37H42F2N8O4
Intedanib Impurity Intedanib Impurity
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
OXELADIN CITRATE OXELADIN CITRATE 52432-72-1 C26H41NO10
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
CHLORHEXIDENE DIACETATE IMPURITY A CHLORHEXIDENE DIACETATE IMPURITY A 152504-08-0 C16H24ClN9
Ipragliflozin Impurity 6 Ipragliflozin Impurity 6
Ibrutinib Impurity 27 Ibrutinib Impurity 27 2031255-26-0 C26H28N6O3
Clopidogrel Impurity 59 Clopidogrel Impurity 59 1122047-98-6 C25H26ClNO6S
Ozagrel Impurity B Ozagrel Impurity B
Ceftriaxone Sodium impurity F Ceftriaxone Sodium impurity F
(R)-5-(2-fluoro-3-methoxyphenyl)-1-(2-fluoro-6-(trifluoromethyl)benzyl)-6-methyl-3-(2-(2-oxopyrrolidin-1-yl)-2-phenylethyl)pyrimidine-2,4(1H,3H)-dione (R)-5-(2-fluoro-3-methoxyphenyl)-1-(2-fluoro-6-(trifluoromethyl)benzyl)-6-methyl-3-(2-(2-oxopyrrolidin-1-yl)-2-phenylethyl)pyrimidine-2,4(1H,3H)-dione 2248628-93-3 C32H28F5N3O4
Famotidine EP Impurity I HCl Famotidine EP Impurity I HCl C8H15N7O2S3
替扎尼定EP杂质C 替扎尼定EP杂质C 1147548-83-1 C16H14Cl2N10S2
nicergoline impurity Q nicergoline impurity Q
Loratadine Impurity 19 Loratadine Impurity 19 79779-58-1 C22H24N2O2
(Z)-2-chloro-3-hydroxyacrylaldehyde (Z)-2-chloro-3-hydroxyacrylaldehyde 50704-42-2 C3H3ClO2
(trans)-3-((benzo[d][1,3]dioxol-5-yloxy)methyl)-4-(4''-fluoro-[1,1''-biphenyl]-4-yl)-1-methylpiperidine hydrochloride (trans)-3-((benzo[d][1,3]dioxol-5-yloxy)methyl)-4-(4''-fluoro-[1,1''-biphenyl]-4-yl)-1-methylpiperidine hydrochloride
Ticagrelor Related Compound 39 Ticagrelor Related Compound 39
Erlotinib Impurity 32 Erlotinib Impurity 32
Pramipexole Impurity 36 Pramipexole Impurity 36
Teneligliptin Impurity 3 Teneligliptin Impurity 3
Erlotinib Hydrochloride iMpurity 52 Erlotinib Hydrochloride iMpurity 52
Ornidazole Impurity J Ornidazole Impurity J 742020-47-9 C7H12N4O3
Daidzein-4′-glucoside Daidzein-4′-glucoside 58970-69-7 C21H20O9
Aprepitant iMpurity 45 Aprepitant iMpurity 45
Afatinib Impurity 75 Afatinib Impurity 75 2348580-72-1 C7H14N2O
Androstan-17-one,2,3-epoxy-16-(1-pyrrolidinyl) Androstan-17-one,2,3-epoxy-16-(1-pyrrolidinyl) 159325-45-8 C23H35NO2
(2b,3a,16b,17b)-2,16-Bispiperidino-3,17-diacetoxy-5-androstane (2b,3a,16b,17b)-2,16-Bispiperidino-3,17-diacetoxy-5-androstane 13529-31-2 C33H54N2O4
Palbociclib Impurity 59 Palbociclib Impurity 59 1430196-98-7 C14H20N4O4
Landiolol impurity Z Landiolol impurity Z
Vitamin K1 Impurity 1 Vitamin K1 Impurity 1 19274-66-9 C31H46O2
Teneligliptin Impurity 13 Teneligliptin Impurity 13
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
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