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Pharmaceutical Impurity Reference Standards

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Structure Chemical Name CAS MF
Ticagrelor impurity 25 Ticagrelor impurity 25
Tirofiban Impurity 14 Tirofiban Impurity 14 1103300-75-9 C12H17NO5S
Tirofiban Impurity 19 Tirofiban Impurity 19 158808-75-4 C18H28N2O3
Amoxicillin Impurity P Amoxicillin Impurity P C16H19N3O5S
Ampicillin Impurity S Ampicillin Impurity S
Cefdinir Impurity F (CP) Cefdinir Impurity F (CP)
Flucloxacillin Sodium Impurity A Flucloxacillin Sodium Impurity A 68728-50-7 C19H20ClFN3NaO6S
Oxacillin Sodium Impurity G(EP) Oxacillin Sodium Impurity G(EP) 724695-30-1 C19H18ClN3O5S
Spectinomycin Impurity D Spectinomycin Impurity D
(4R,4aS,5aR,12aS)-9-[2-(tert-butylamino)acetamido]-4,7-bis(dimethylamino)-3,10,12,12a-tetrahydroxy-1,11-dioxo-1,4,4a,5,5a,6,11,12a-octahydrotetracene-2-carboxamide (4R,4aS,5aR,12aS)-9-[2-(tert-butylamino)acetamido]-4,7-bis(dimethylamino)-3,10,12,12a-tetrahydroxy-1,11-dioxo-1,4,4a,5,5a,6,11,12a-octahydrotetracene-2-carboxamide C29H39N5O8
Amifostine Impurity 3 Amifostine Impurity 3 41510-53-6 C5H15N2O3PS
Cefradine impurity C Cefradine impurity C
Cefuroxime sodium impurity H Cefuroxime sodium impurity H C16H16N4NaO8S
Bilastine N-Oxide Bilastine N-Oxide 2069238-47-5 C28H37N3O4
Cefoxitin impurity F Cefoxitin impurity F
Tenofovir Disoproxil Fumarate impurity N Tenofovir Disoproxil Fumarate impurity N 1962114-92-6 C29H44N10O14P2
Prednisolone Impurity 7 Prednisolone Impurity 7 61549-70-0 C21H26O6
Tenofovir Related Compound 10 Tenofovir Related Compound 10 16958-60-4 C8H11N5O
N-(4-methyl-3-(N-(4-(pyridin-3-yl)pyrimidin-2-yl)acetamido)phenyl)-4-((4-methylpiperazin-1-yl)methyl)benzamide N-(4-methyl-3-(N-(4-(pyridin-3-yl)pyrimidin-2-yl)acetamido)phenyl)-4-((4-methylpiperazin-1-yl)methyl)benzamide C31H33N7O2
N1-benzyl-N1,4-dimethyl-N3-(4-(pyridin-3-yl)pyrimidin-2-yl)benzene-1,3-diamine N1-benzyl-N1,4-dimethyl-N3-(4-(pyridin-3-yl)pyrimidin-2-yl)benzene-1,3-diamine C24H23N5
(E)-4-(((5-(2-fluorophenyl)-1-(pyridin-3-ylsulfonyl)-1H-pyrrol-3- yl)methyl)(methyl)amino)-4-oxobut-2-enoic acid (E)-4-(((5-(2-fluorophenyl)-1-(pyridin-3-ylsulfonyl)-1H-pyrrol-3- yl)methyl)(methyl)amino)-4-oxobut-2-enoic acid C21H18FN3O5S
Apremilast Apremilast 1384439-80-8 C17H16N2O6S
TROXACITABINE TROXACITABINE 145511-98-4 C8H11N3O4
XXZJUZXKBFUPQH-IKGGRYGDSA-N XXZJUZXKBFUPQH-IKGGRYGDSA-N 1618657-31-0 C18H17FO4
6-methyl-2-oxo-5-pyridin-2-yl-1H-pyridine-3-carbonitrile 6-methyl-2-oxo-5-pyridin-2-yl-1H-pyridine-3-carbonitrile 106637-42-7 C12H9N3O
Levofloxacin Impurity 15 Levofloxacin Impurity 15 94714-58-6 C14H12F4O4
Losartan Impurity 2 Losartan Impurity 2 1407521-00-9 C22H20ClN3O
Epoxy Exemestane (6-Alfa Isomer) Epoxy Exemestane (6-Alfa Isomer) 152764-24-4 C20H24O3
6-Cyclopropyl-10-fluoro-7,8-dihydrobenzo[k]phenanthridine 6-Cyclopropyl-10-fluoro-7,8-dihydrobenzo[k]phenanthridine 1187966-94-4 C20H16FN
2-methoxy-1,7,9-trimethylpurine-6,8-dione 2-methoxy-1,7,9-trimethylpurine-6,8-dione 51168-26-4 C9H12N4O3
2-CHLORO-N-(2,5-DIMETHYLPHENYL)ACETAMIDE 2-CHLORO-N-(2,5-DIMETHYLPHENYL)ACETAMIDE 5177-35-5 C10H12ClNO
(R)-(+)-(3-CHLORO-2-HYDROXYPROPYL)TRIMETHYLAMMONIUM CHLORIDE (R)-(+)-(3-CHLORO-2-HYDROXYPROPYL)TRIMETHYLAMMONIUM CHLORIDE 117604-42-9 C6H15Cl2NO
REICHSTEIN'S SUBSTANCE S 21-ACETATE REICHSTEIN'S SUBSTANCE S 21-ACETATE 640-87-9 C23H32O5
N,N'-(OXYDI-4,1-PHENYLENE)BISACETAMIDE N,N'-(OXYDI-4,1-PHENYLENE)BISACETAMIDE 3070-86-8 C16H16N2O3
3-(2-hydroxyethyl) 5-methyl 2,6-dimethyl-4-(3-nitrophenyl)-1,4-dihydropyridine-3,5-dicarboxylate 3-(2-hydroxyethyl) 5-methyl 2,6-dimethyl-4-(3-nitrophenyl)-1,4-dihydropyridine-3,5-dicarboxylate 85677-95-8 C18H20N2O7
3-isobutylisobenzofuran-1(3H)-one 3-isobutylisobenzofuran-1(3H)-one 199736-94-2 C12H14O2
isopropyl(4,6-diamino-2-(1-(2-fluorobenzyl)-1H-pyrazolo[3,4-b] pyridin-3-yl)pyrimidin-5-yl)(methyl)carbamate isopropyl(4,6-diamino-2-(1-(2-fluorobenzyl)-1H-pyrazolo[3,4-b] pyridin-3-yl)pyrimidin-5-yl)(methyl)carbamate 625115-54-0 C22H23FN8O2
Malvidin 3-O-glucoside Malvidin 3-O-glucoside 18470-06-9 C23H25O12+
(S)-Olodaterol (S)-Olodaterol 868049-50-7 C21H26N2O5
5,6-DIHYDRO-3-METHYLAMINO-2H-1,4-THIAZIN-2-ONE OXIME 5,6-DIHYDRO-3-METHYLAMINO-2H-1,4-THIAZIN-2-ONE OXIME 148639-72-9 C5H9N3OS
M-ISOBUTYL IBUPROFEN M-ISOBUTYL IBUPROFEN 66622-47-7 C13H18O2
1,3-BIS(METHYLTHIO)-2-PROPANOL 1,3-BIS(METHYLTHIO)-2-PROPANOL 31805-83-1 C5H12OS2
4-ISOTHIOCYANATO-4'-NITRODIPHENYL ETHER 4-ISOTHIOCYANATO-4'-NITRODIPHENYL ETHER 19881-18-6 C13H8N2O3S
(R)-N-Glycidylphthalimide (R)-N-Glycidylphthalimide 181140-34-1 C11H9NO3
6-chloro-N-((1R,2S)-2-(3,4-difluorophenyl)cyclopropyl)-5- nitro-2-(propylthio)pyrimidin-4-amine 6-chloro-N-((1R,2S)-2-(3,4-difluorophenyl)cyclopropyl)-5- nitro-2-(propylthio)pyrimidin-4-amine 1427523-93-0 C16H15ClF2N4O2S
Bendamustine Impurity 15 Bendamustine Impurity 15
Bendamustine Related Impurity 10 Bendamustine Related Impurity 10
Bortezomib Impurity 16 Bortezomib Impurity 16
Captopril Related Compound 8 Captopril Related Compound 8 112243-88-6 C9H15NO3S
Edoxaban Impurity 25 (1R,2S,4R) Oxalate Edoxaban Impurity 25 (1R,2S,4R) Oxalate
Ezetimibe Impurity 35 Ezetimibe Impurity 35 1650568-82-3 C39H46F2N2O5Si2
Fosaprepitant Impurity 8 Fosaprepitant Impurity 8
Linagliptin Impurity 28 Linagliptin Impurity 28 2074688-84-7 C22H23N7O3
Pantoprazole Impurity 3 Pantoprazole Impurity 3
Ticagrelor Related Compound 58 Ticagrelor Related Compound 58
Vildagliptin Impurity 9 Vildagliptin Impurity 9
Cefathiamidine Impurity 5 Cefathiamidine Impurity 5 40818-86-8 C10H11ClN2O4S
methyl 4-hydroxy-3,5-diisopropylbenzoic acid methyl 4-hydroxy-3,5-diisopropylbenzoic acid C14H20O3
Apixaban Impurity J Apixaban Impurity J
Avibactam Impurity C Avibactam Impurity C
Brexpiprazole Impurity M Brexpiprazole Impurity M
Cefaclor Impurity 5 Cefaclor Impurity 5
Linagliptin Impurity 39 Linagliptin Impurity 39
Peramivir Impurity 5 Peramivir Impurity 5
Pidotimod Impurity O Pidotimod Impurity O
Pramipexole EP Impurity C Pramipexole EP Impurity C
Imiquimod Impurity 5 Imiquimod Impurity 5 853793-02-9 C15H18N4
9-(1,3-diacetate-2-propoxymethyl)guanine 9-(1,3-diacetate-2-propoxymethyl)guanine 86357-19-9 C13H17N5O6
Cefadroxil Impurity 6 Cefadroxil Impurity 6 2378158-45-1 C32H32N6O9S2
Loratadine Impurity 9 Loratadine Impurity 9 125743-81-9 C22H23ClN2O2
Metronidazole Impurity 1 Metronidazole Impurity 1
Parecoxib Impurity 16 Parecoxib Impurity 16 2235371-89-6 C19H18N2O4S
Rosuvastatin Impurity 54 Rosuvastatin Impurity 54
Vonoprazan Fumarate Impurity 6 Vonoprazan Fumarate Impurity 6 2250243-23-1 C33H27F2N5O4S2
3-((3aS,4R,6S,6aR)-6-(2-hydroxyethoxy)-2,2-dimethyltetrahydro- 4H-cyclopenta[d][1,3]dioxol-4-yl)-5-(propylthio)-3H-[1,2,3] triazolo[4,5-d]pyrimidin-7-ol 3-((3aS,4R,6S,6aR)-6-(2-hydroxyethoxy)-2,2-dimethyltetrahydro- 4H-cyclopenta[d][1,3]dioxol-4-yl)-5-(propylthio)-3H-[1,2,3] triazolo[4,5-d]pyrimidin-7-ol 1456538-51-4 C17H25N5O5S
Esomeprazole Impurity 24 Esomeprazole Impurity 24
Prasugrel Impurity 15 Prasugrel Impurity 15
Pregabalin Impurity 18 Pregabalin Impurity 18 1621171-19-4 C9H15NO2
Pregabalin Impurity 23 Pregabalin Impurity 23
Butylphthalide impurity Butylphthalide impurity 16692-58-3 C12H14O2
ethyl 2,5-dihydroxybenzenesulfonate ethyl 2,5-dihydroxybenzenesulfonate C8H10O5S
5-ALLYLIDENE-10,11-DIHYDRO-5H-DIBENZO[A,D]CYCLOHEPTENE 5-ALLYLIDENE-10,11-DIHYDRO-5H-DIBENZO[A,D]CYCLOHEPTENE 24755-73-5 C18H16
Nintedanib Impurity 27 Nintedanib Impurity 27
ethyl 2-(2-formyl-3-hydroxyphenyl)-4-methylthiazole-5- carboxylate ethyl 2-(2-formyl-3-hydroxyphenyl)-4-methylthiazole-5- carboxylate C14H13NO4S
LUMAT-004 LUMAT-004 313544-31-9 C16H17N3O3
Varenicline Impurity 3 Varenicline Impurity 3 1333145-89-3 C14H15N3
Econazole Related Compound C (15 mg) (1-(4-Chlorobenzyl)-3-[(2RS)-2-[(4-chlorobenzyl)oxy]-2-(2,4-dichlorophenyl)ethyl]imidazolium chloride) Econazole Related Compound C (15 mg) (1-(4-Chlorobenzyl)-3-[(2RS)-2-[(4-chlorobenzyl)oxy]-2-(2,4-dichlorophenyl)ethyl]imidazolium chloride) 57265-33-5
Amlodipine Impurity 22 (Z-Isomer) Amlodipine Impurity 22 (Z-Isomer) C26H31ClN2O8S
Amlodipine Impurity 28 Amlodipine Impurity 28 79781-21-8 C18H20ClNO5
Axitinib Impurity 16 Axitinib Impurity 16
Axitinib Impurity 22 Axitinib Impurity 22
Imidazo[5,1-f][1,2,4]triazin-4(1H)-one, 2-[2-ethoxy-5-[(4-ethyl-4-oxido-1-piperazinyl)sulfonyl]phenyl]-5-methyl-7-propyl- Imidazo[5,1-f][1,2,4]triazin-4(1H)-one, 2-[2-ethoxy-5-[(4-ethyl-4-oxido-1-piperazinyl)sulfonyl]phenyl]-5-methyl-7-propyl- 448184-48-3 C23H32N6O5S
Dolutegravir 4-Desfluoro Impurity Dolutegravir 4-Desfluoro Impurity 1863916-87-3 C20H20FN3O5
Tetrabenazine Dehydro Impurity Tetrabenazine Dehydro Impurity 100322-43-8 C19H25NO3
Cefotiam Impurity 22 Cefotiam Impurity 22 1628441-07-5 C13H14N4O5S2
Dezocine Impurity 2 Dezocine Impurity 2 100667-17-2 C16H21NO
loteprednol Impurity 7 loteprednol Impurity 7 82034-20-6 C24H33ClO7
Sitagliptin Impurity 28 Sitagliptin Impurity 28 898543-70-9 C32H25F12N9O2
Vilanterol Impurity 3 Triphenylacetate Vilanterol Impurity 3 Triphenylacetate 503070-62-0 C23H31Cl2NO5
Empagliflozin Impurity 33 Empagliflozin Impurity 33
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