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KARPSCHEM LABORATORIES
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KARPSCHEM LABORATORIES Product List
- Product Name Febuxostat Impurity 8 2-(3-formyl-4-isobutoxyphenyl)-4-methylthiazole-5-carboxylic acid
- MF C16H17NO4S
- CAS 144060-62-8
- Product Name Duloxetine EP Impurity D α-Napthol (USP) ; Naphthalen-1-ol
- MF C10H8O
- CAS 90-15-3
- Product Name Metolazone EP Impurity C Metolazone USP RC A ; Desmethyl metolazone ; 7-Chloro-1,2,3,4-tetrahydro-2-methyl-4-oxo-3-phenyl-6- quinazolinesulfonamide
- MF C15H14ClN3O3S
- CAS 28524-40-5
- Product Name Prucalopride impurity B 4-amino-5-chloro-2,3dihydro-1-benzofuran7-carboxamide
- MF C9H9ClN2O2
- CAS 182808-16-8
- Product Name Febuxostat Isopropyl Ester Isopropyl 2-(3-cyano-4-isobutoxyphenyl)-4-methylthiazole-5- carboxylate
- MF C19H22N2O3S
- CAS 1346238-10-5
- Product Name Ranolazine impurity C 1-(2-methoxyphenoxy)-3-(piperazin-1-yl)propan-2-ol
- MF C14H22N2O3
- CAS 162712-35-8
- Product Name 1-Phenyl-3-oxabicyclo[3.1.0]hexan-2-one
- MF C11H10O2
- CAS 63106-93-4
- Product Name Buspirone EP Impurity K USP RC K ; 8-Azaspiro[4.5]decane-7,9-dione
- MF C9H13NO2
- CAS 1075-89-4
- Product Name Lisinopril EP Impurity D R,S,S-Diketopiperazine
- MF C21H29N3O4
- CAS 219677-82-4
- Product Name Losartan EP Impurity K Losartan USP RC C ; Losartan Aldehyde ; 2-Butyl-4-chloro-1-[p- (o-1H-tetrazol-5-ylphenyl)benzyl]imidazole-5-formaldehyde
- MF C22H21ClN6O
- CAS 114798-36-6
- Product Name Eprosartan (E)-3-[2-Butyl-1-[(4-carboxyphenyl)methyl]-imidazol-5-yl]-2-(2- thienyl methyl)-2-propenoic acid
- MF C23H24N2O4S
- CAS 133040-01-4
- Product Name Mesalazine EP Impurity M 2-chloro-5-nitrobenzoic acid, Mesalamine EP Impurity M
- MF C7H4ClNO4
- CAS 2516-96-3
- Product Name Prucalopride impurity D Methyl 4-amino-5chloro-2,3dihydrobenzofuran7-carboxylate
- MF C10H10ClNO3
- CAS 182808-04-4
- Product Name Paracetamol EP Impurity A N-(2-hydroxyphenyl)acetamide
- MF C8H9NO2
- CAS 614-80-2
- Product Name Venlafaxine HCl 1-[2-(Dimethylamino)-1-(4-methoxyphenyl)ethyl]cyclohexanol hydrochloride
- MF C17H28ClNO2
- CAS 99300-78-4
- Product Name Ivabradine chloro Impurity 3-(3-chloropropy)-7,8-dimethoxy-1,3-dihydro-2H- benzo[d]azepin-2-one
- MF C15H18ClNO3
- CAS 85175-59-3
- Product Name Lidocaine EP Impurity H Lidocaine USP Related Compound H ; 2-Chloro-N- (2,6-dimethylphenyl)acetamide
- MF C10H12ClNO
- CAS 1131-01-7
- Product Name Diclofenac EP Impurity D 2-[2-[(2-Bromo-6-chlorophenyl) amino]phenyl] acetic acid
- MF C14H10BrClNNaO2
- CAS 127792-45-4
- Product Name Pantoprazole EP Impurity D Pantoprazole Related Compound D and F Mixture ; 5-(difluoromethoxy)-2-(((3,4-dimethoxypyridin-2- yl)methyl)sulfinyl)-1-methyl-1H-benzo[d]imidazole
- MF C17H17F2N3O4S
- CAS 624742-53-6
- Product Name Omeprazole EP Impurity E Omeprazole USP RC E ; Esomeprazole EP Impurity E ; Omeprazole N-Oxide
- MF C17H19N3O4S
- CAS 176219-04-8
- Product Name 4-Amino-N-[4- (trifluoromethyl)phenyl]benzamide/Teriflunomide Impurity 3
- MF C14H11F3N2O
- CAS 1011244-72-6
- Product Name Propylparaben propyl 4-hydroxybenzoate
- MF C10H12O3
- CAS 94-13-3
- Product Name Methylparaben methyl 4-hydroxybenzoate
- MF C8H8O3
- CAS 99-76-3
- Product Name Gliclazide Impurity 1 hexahydrocyclopenta[c]pyrrol-2(1H)-amine hydrochloride
- MF C7H15ClN2
- CAS 58108-05-7
- Product Name Metamizole EP Impurity E Dipirone Impurity E ; ((1,5-dimethyl-3-oxo-2-phenyl-2,3-dihydro-1H-pyrazol-4- yl)amino)methanesulfonic acid
- MF C12H15N3O4S
- CAS 117-38-4
- Product Name ketoprofen EP impurity C 3-(1-carboxyethyl)benzoic acid
- MF C10H10O4
- CAS 68432-95-1
- Product Name Leflunomide EP Impurity B Leflunomide USP RC B ; (Z)-2-cyano-3-hydroxy-N-(4- (trifluoromethyl) phenyl)but-2-enamide
- MF C12H9F3N2O2
- CAS 163451-81-8
- Product Name Febuxostat Methyl Ester Methyl 2-(3-cyano-4-isobutoxyphenyl)-4-methylthiazole-5- carboxylate
- MF C17H18N2O3S
- CAS 923942-34-1
- Product Name Pregabalin EP Impurity B USP Pregabalin Related Compound A ; (R)-3-(aminomethyl)-5- methylhexanoic acid
- MF C8H17NO2
- CAS 148553-51-9
- Product Name Fenticonazole Nitrate EP Impurity B 1-(2-(2,4-dichlorophenyl)-2-((4-(phenylsulfinyl)benzyl)oxy)ethyl) -1H-imidazole nitrate
- MF C24H21Cl2N3O5S
- CAS 80639-95-8
- Product Name (S)-Hexahydro-pyrrolo[1,2-a]pyrazine-1,4-dione
- MF C7H10N2O2
- CAS 3705-27-9
- Product Name Albendazole Methyl 5-propylthio-2-benzimidazolecarbamate
- MF C12H15N3O2S
- CAS 54965-21-8
- Product Name Zonisamide 1,2-Benzisoxazole-3-methanesulfonamide
- MF C8H8N2O3S
- CAS 68291-97-4
- Product Name ketoprofen EP impurity E 2-(3-benzoylphenyl)propanamide
- MF C16H15NO2
- CAS 59512-16-2
- Product Name Bumetanide Impurity 1 Methyl 3-nitro-4-phenoxy-5-sulfamoylbenzoate
- MF C14H12N2O7S
- CAS 57939-04-5
- Product Name N-Methyl Zonisamide N-Methyl-1,2-benzisoxazole-3-methanesulfonamide
- MF C9H10N2O3S
- CAS 68292-02-4
- Product Name Metronidazole EP impurity A 2-methyl-5-nitro-1H-imidazole
- MF C4H5N3O2
- CAS 696-23-1
- Product Name Cetirizine EP Impurity C Cetirizine 2-Chloro Analog (RS)-2-[2-[4-[(2- Chlorophenyl)phenylmethyl]piperazin-1-yl]ethoxy] acetic acid
- MF C21H25ClN2O3
- CAS 83881-59-8
- Product Name 2-Chloro BHP Cetirizine 1-[(2-Chlorophenyl)phenylmethyl]piperazine
- MF C17H19ClN2
- CAS 109036-15-9
- Product Name Ranolazine Related Compound B Ranolazine Desmethoxy Impurity ; N-(2,6-dimethylphenyl)-2-(4-(2-hydroxy-3- phenoxypropyl)piperazin-1-yl)acetamide
- MF C23H31N3O3
- CAS 755711-09-2
- Product Name Labetalol EP Impurity A 2-hydroxy-5-((S)-1-hydroxy-2-(((S)-4-phenylbutan-2-yl)amino)ethyl)benzoic acid
- MF C19H23NO4
- CAS 1391051-99-2
- Product Name Cetirizine Ethyl Ester Cetirizine Dihydrochloride Ethyl Ester ; (RS)-2-[2-[4-[(4- Chlorophenyl)phenylmethyl]piperazin-1-yl]ethoxy]acetic acid ethyl ester
- MF C23H29ClN2O3
- CAS 246870-46-2
- Product Name Nabumetone EP Impurity F 6,6'-dimethoxy-2,2'-binaphthalenyl
- MF C22H18O2
- CAS 29619-45-2
- Product Name Ranolazine Dimer Impurity α,α’-Bis[(2-Methoxyphenoxy)methyl]-1,4-piperazinediethanol
- MF C24H34N2O6
- CAS 333749-57-8
- Product Name (R)-Sitagliptin N-Boc-Methyl-Ester Impurity methyl (R)-3-((tert-butoxycarbonyl)amino)-4-(2,4,5- trifluorophenyl)butanoate
- MF C16H20F3NO4
- CAS 881995-73-9
- Product Name Gliclazide EP Impurity D Gliclazide BP Impurity D;N-[(4- Methylphenyl)sulfonylhexahydrocyclopenta[c] pyrrol-2(1H)-carboxamide
- MF C15H20N2O3S
- CAS 1136426-19-1
- Product Name Bisoprolol EP Impurity N (2RS)-1-[4-((2-Ethoxyethoxy)methyl)phenoxy]-3- (isopropylamino)-2-propanol
- MF C17H29NO4
- CAS 1346601-75-9
- Product Name Valganciclovir Hydrochloride L-Valine 2-[(2-amino-1,6-dihydro-6-oxo-9H-purin-9-yl)methoxy]- 3-hydroxy propyl ester hydrochloride
- MF C14H23ClN6O5
- CAS 175865-59-5
- Product Name Warfarin 2-Oxo-3-[(1RS)-3-oxo-1-phenylbutyl]-2H-1-benzopyran-4-ol
- MF C19H16O4
- CAS 81-81-2
- Product Name Carbamazepine 5H-Dibenzo[b,f]azepine-5-carboxamide
- MF C15H12N2O
- CAS 298-46-4
- Product Name Allopurinol 1,5-Dihydro-4H-pyrazolo[3,4-d]pyrimidin-4-one
- MF C5H4N4O
- CAS 315-30-0
- Product Name Zonisamide Related Compound C N,N-Dimethyl Formimidamide ; (E)-N'-((benzo[d]isoxazol-3-ylmethyl)sulfonyl)-N,N- dimethylformimidamide
- MF C11H13N3O3S
- CAS 1217201-89-2
- Product Name Bisoprolol EP Impurity K 2-isopropoxyethyl 4-(2-hydroxy-3- (isopropylamino)propoxybenzoate
- MF C18H29NO5
- CAS 864544-37-6
- Product Name Alprazolam Impurity E Prazepam Imp. C (EP), Clorazepate Imp. A (EP), , 2-Amino-5- chloro benzophenone
- MF C13H10ClNO
- CAS 719-59-5
- Product Name Roxithromycin
- MF C41H76N2O15
- CAS 80214-83-1
- Product Name Albendazole EP Impurity C Albendazole Sulfone ; Methyl [5-(propylsulphonyl) -1Hbenzimidazol-2-yl]carbamate
- MF C12H15N3O4S
- CAS 75184-71-3
- Product Name Metoprolol EP Impurity C Metoprolol USP Related Compound C ; 4-[(2RS)-2-Hydroxy-3-[(1- methylethyl)amino]propoxy]benzaldehyde
- MF C13H19NO3
- CAS 29122-74-5
- Product Name Alfuzosin EP Impurity C (RS)-N-[3-[(4-Amino-6,7-dimethoxyquinazolin-2-yl)amino]propyl]-N-methyltetrahydrofuran-2-carboxamide hydrochloride
- MF C19H28ClN5O4
- CAS 72104-34-8
- Product Name Vildagliptin Dimer Impurity (2S,2'S)-1,1'-(2,2'-(((1r,3R,5R,7S)-3-hydroxyadamantan-1- yl)azanediyl)bis(acetyl))bis(pyrrolidine-2-carbonitrile)
- MF C24H33N5O3
- CAS 1036959-23-5
- Product Name Vildagliptin Chloroacetyl Amide (R)-Isomer (R)-1-(2-Chloroacetyl)pyrrolidine-2-carboxamide
- MF C7H11ClN2O2
- CAS 1211679-98-9
- Product Name Carbamazepine EP Impurity B 9-Methylacridine
- MF C14H11N
- CAS 611-64-3
- Product Name Azithromycin EP Impurity B(2R,3R,4S,5R,8R,10R,11R,12S,13S,14R)-13-[(2,6-Dideoxy-3-C- methyl-3-O-methyl-α-L-ribo-hexopyranosyl)oxy]-2-ethyl-4,10- dihydroxy-3,5,6,8,10,12,14-heptamethyl-11-[[3,4,6-trideoxy-3- (dimethylamino)-β-D-xylo-hexopyranosyl]oxy]-1-Oxa-6-
- MF C38H72N2O11
- CAS 307974-61-4
- Product Name Alfuzosin Aminopropyl Impurity ; Alfuzosin USP Related Compound D
- MF C14H22ClN5O2
- CAS 81403-69-2
- Product Name Bisoprolol Carboxylic Acid Impurity 4-(2-Hydroxy-3-isopropylaminopropoxy)benzoic Acid
- MF C13H19NO4
- CAS 72570-70-8
- Product Name Alfuzosin EP Impurity A Alfuzosin USP Related Compound A ; Alfuzosin Tetradehydro Impurity
- MF C19H24ClN5O4
- CAS 98902-29-5
- Product Name Guanine 2-amino-9H-purin-6(1H)-one
- MF C5H5N5O
- CAS 73-40-5
- Product Name Vortioxetine Sulfoxide
- MF C18H22N2OS
- CAS 1429908-35-9
- Product Name Bisoprolol EP Impurity Q (2RS)-1-Isopropylamino-3-[4-(2-methoxyethoxy)methyl]- phenoxy-2-propanol
- MF C16H27NO4
- CAS 1346604-00-9
- Product Name Albendazole EP Impurity B Methyl [5-(propylsulphinyl)-1Hbenzimidazol-2-yl] carbamate
- MF C12H15N3O3S
- CAS 54029-12-8
- Product Name Carbamazepine EP Impurity F H-dibenzo[b,f]azepine-5-carbonyl chloride
- MF C15H10ClNO
- CAS 33948-22-0
- Product Name Allopurinol EP Impurity C Allopurinol USP RC C ; 5-(4H-1,2,4-triazol-4-yl)-1H-pyrazole-4- carboxamide
- MF C6H6N6O
- CAS 1346604-13-4
- Product Name Vildagliptin Chloroacetyl Nitrile (S)-Isomer (2S)-1-(Chloroacetyl)-2-Pyrrolidinecarbonitrile ; Vildagliptin Impurity 14
- MF C7H9ClN2O
- CAS 207557-35-5
- Product Name Zonisamide Related Compound A (1,2-benzisoxazole-3-methanesulfonic acid sodium salt
- MF C8H8NNaO4S
- CAS 73101-64-1
- Product Name 2-Butyl Benzofuran
- MF C12H14O
- CAS 4265-27-4
- Product Name 1,2-Benzisoxazol-3-ylacetic Acid
- MF C9H7NO3
- CAS 4865-84-3
- Product Name Althiazide (3R)-3-[(Allylsulfanyl)methyl]-6-chloro-3,4-dihydro-2H-1,2,4- benzothiadiazine-7-sulfonamide 1,1-dioxide
- MF C11H14ClN3O4S3
- CAS 5588-16-9
- Product Name Albendazole EP Impurity D Desmethoxycarbonyl Albendazole Sulfone
- MF C10H13N3O2S
- CAS 80983-34-2
- Product Name Allopurinol EP Impurity B Allopurinol USP RC B ; 5-(formylamino)-1H-pyrazole-4 -carboxamide
- MF C5H6N4O2
- CAS 22407-20-1
- Product Name Vildagliptin Amino Alcohol Impurity 1-Amino-3-adamantanol ; Vildagliptin Impurity 15
- MF C10H17NO
- CAS 702-82-9
- Product Name Diacetylguanine
- MF C9H9N5O3
- CAS 3056-33-5
- Product Name Vortioxetine 1-[2-[(2,4-Dimethylphenyl)thio]phenyl]piperazine
- MF C18H22N2S
- CAS 508233-74-7
- Product Name Amiodarone (2-Butyl-3-benzofuranyl)[4-[2-(diethylamino)ethoxy]-3,5- diiodophenyl] methanone Hydrochloride
- MF C25H29I2NO3.ClH
- CAS 19774-82-4
- Product Name Vildagliptin (2S)-1-[2-[(3-Hydroxytricyclo[3.3.1.13,7]dec-1-yl)amino]acetyl]- 2-pyrrolidinecarbonitrile
- MF C17H25N3O2
- CAS 274901-16-5
- Product Name Carbamazepine EP Impurity E 10,11-dihydro-5H-dibenzo[b,f]azepine (iminodibenzyl)
- MF C14H13N
- CAS 494-19-9
- Product Name Allopurinol EP Impurity D Allopurinol USP RC D ; ethyl 5-amino-1H-pyrazole-4-carboxylate
- MF C6H9N3O2
- CAS 6994-25-8
- Product Name Vortioxetine Impurity 31 2,4-Xylenethiol; 2,4-Dimethylbenzenethiol; 2,4- Dimethylthiopheno
- MF C8H10S
- CAS 13616-82-5
- Product Name Vildagliptin Chloroacetyl Nitrile (R)-Isomer Vildagliptin Chloroacetyl Nitrile (R)-Isomer
- MF C7H9ClN2O
- CAS 565452-98-4
- Product Name Albendazole EP Impurity A 5-(Propylthio)-1H-benzimidazol-2-amine
- MF C10H13N3S
- CAS 80983-36-4
- Product Name Allopurinol EP Impurity E Allopurinol USP RC E ; ethyl 5-(formylamino)-1H-pyrazole-4- carboxylate
- MF C7H9N3O3
- CAS 31055-19-3
- Product Name Vildagliptin Chloroacetyl Amide (S)-Isomer (S)-1-(2-chloroacetyl)pyrrolidine-2-carboxamide
- MF C7H11ClN2O2
- CAS 214398-99-9
- Product Name Alfuzosin EP Impurity B 2-chloro-6,7-dimethoxyquinazolin-4-amine ; 4-Amino-2-chloro- 6,7-dimethoxyquinazoline ; 2-Chloro-6,7-dimethoxy-4- quinazolinamine
- MF C10H10ClN3O2
- CAS 23680-84-4
- Product Name 3-Des(allylthio)methyl-3-chloromethyl Althiazide 6-Chloro-3-(chloromethyl)-3,4-dihydro-2H-1,2,4- benzothiadiazine-7-sulfonamide 1,1-Dioxide
- MF C8H9Cl2N3O4S2
- CAS 1824-47-1
- Product Name Alfuzosin EP Impurity E N-[3-[(4-Amino-6,7-dimethoxyquinazolin-2-yl)(methyl)aminopropyl]formamide hydrochloride
- MF C15H21N5O3
- CAS 1026411-59-5
- Product Name Azithromycin
- MF C38H74N2O13
- CAS 117772-70-0
- Product Name Alfuzosin HCl (RS)-N-[3-[(4-Amino-6,7-dimethoxyquinazolin-2- yl)(methyl)amino]propyl]tetrahydrofuran-2-carboxamide hydrochloride
- MF C19H28ClN5O4
- CAS 81403-68-1
- Product Name Carbamazepine EP Impurity D 5H-Dibenzo[b,f]azepine
- MF C14H11N
- CAS 256-96-2
- Product Name (R)-Vildagliptin (R)-1-(((1r,3S,5R,7S)-3-hydroxyadamantan-1- yl)glycyl)pyrrolidine-2-carbonitrile
- MF C17H25N3O2
- CAS 1036959-27-9
- Product Name Vildagliptin Carboxamide Impurity (2S)-1-[2-[(3-Hydroxytricyclo[3.3.1.13,7]dec-1-yl)amino]acetyl]- 2-pyrrolidine carboxamide ; Vildagliptin Impurity 16
- MF C17H27N3O3
- CAS 565453-39-6
- Product Name Allopurinol EP Impurity A Allopurinol USP RC A ; 5-amino-1H-pyrazole-4-carboxamide
- MF C8H14N8O6S
- CAS 27511-79-1