KARPSCHEM LABORATORIES

Main products: Adenosine,Albendazole,Albendazole EP Impurity A,Allopurinol,Amoxicillin

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Company Name:KARPSCHEM LABORATORIES PVT. LTD.
Tel:+917249203006
Email:info@karpschem.in
WebSite:www.karpschem.in
Product Total:821
CB Index:58
Nationality:India
      KarpsChem is an independent research driven company specialized in the custom synthesis of pharmacopeia & non-pharmacopeia reference standards, drug gluconorides, drug metabolites, Isotope labelled reference standards and focused compound libraries. As a research-driven organization, we have developed novel processes to make niche products required to pharmaceutical companies globally at various platform. We understand the industry research needs thoroughly and have earned reputation for being most reliable innovator of pharmaceutical reference standards worldwide. Team having expertise of synthesis for undertaking CRAMs and CRO projects from Pharmaceutical, Agriculture and Veterinary industries. Variety of impurities like Genotoxic, Neurotoxic impurities required for agencies like USFDA, MHRDA etc,are available.
Product Name MF CAS Details
Closantel EP Impurity A 2-Hydroxy-3,5-diiodobenzoic acid C7H4I2O3 133-91-5
Gabapentin EP Impurity A Gabapentin USP Related Compound A ; Gabapentin Lactam ; 3-Azaspiro-[4,5]decan-3-one C9H15NO 64744-50-9
Rabeprazole Sodium Sodium 2-[[4-(3-methoxypropoxy)-3-methyl-pyridin-2- yl]methylsulfinyl ]benzoimidazole C18H21N3O3S.Na 117976-90-6
Ondansetron EP Impurity C 9-methyl-1,2,3,9-tetrahydro-4H-carbazol-4-one C13H13NO 27387-31-1
Memantine Related Compound C (1r,3R,5S,7r)-1-chloro-3,5-dimethyladamantane C12H19Cl 707-36-8
Prasugrel Bromobutyryl Impurity 5-(5-bromo-1-(2-fluorophenyl)-2-oxopentyl)-4,5,6,7- tetrahydrothieno[3,2-c] pyridin-2-yl acetate C20H21BrFNO3S 1373350-59-4
ketoprofen EP impurity D 2-(3-(4-methylbenzoyl)phenyl)propanoic acid C17H16O3 107257-20-5
Olmesartan Imidazole Diacid Impurity 2-Propyl-1H-imidazole-4,5-dicarboxylic acid C8H10N2O4 58954-23-7
Lacosamide EP Impurity L (R)-2-(Acetylamino)-3-methoxy-N-methyl-N-(phenylmethyl)- propanamide C14H20N2O3 388619-64-5
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- C38H72N2O11 307974-61-4
Alfuzosin Aminopropyl Impurity ; Alfuzosin USP Related Compound D C14H22ClN5O2 81403-69-2
Telmisartan Bromo Nitrile Impurity 4'-(Bromomethyl)-[1,1'-biphenyl]-2-carbonitrile ; 2-(4- Bromomethylphenyl) benzonitrile C14H10BrN 114772-54-2
Irbesartan Bromo Nitrile Impurity 4'-(Bromomethyl)biphenyl-2-carbonitrile C14H10BrN 114772-54-2
Atenolol EP Impurity C 2-[4-[[(2RS)-oxiran-2-yl]methoxy]phenyl]acetamide C11H13NO3 29122-69-8
Isobutyl-glutamonoamide (R)-3-(2-amino-2-oxoethyl)-5-methylhexanoic acid C9H17NO3 181289-33-8
Emtricitabine SM 5-(4-Amino-5-fluoro-2-oxo-1(2H)-pyrimidinyl)-1,3-oxathiolane-2 carboxylic acid 5-methyl-2-(1-methylethyl)cyclohexyl ester C18H26FN3O4S 147126-75-8
Metamizole EP Impurity A 4-(formylamino)-1,5-dimethyl-2-phenyl-2,3-dihydro-1H-pyrazol- 3-one ; 4-Formylamino Antipyrine C12H13N3O2 1672-58-8
Fenticonazole Nitrate EP Impurity E 3-(2-(2,4-dichlorophenyl)-2-((4-(phenylthio)benzyl)oxy)ethyl)-1- (4-(phenylthio)benzyl)-1H-imidazol-3-ium Hydrochloride C37H31Cl2N2OS2+ 756429-44-4
Mesalazine EP Impurity J 3,5-diamino-2-hydroxybenzoic acid (3,5-diaminosalicylic acid).; Mesalamine EP Impurity J C7H8N2O3 112725-89-0
Dabigatran Methylamino Impurity C18H22N4O3 212322-56-0
Lisinopril Dihydrate (S)-1-[N2-(1-Carboxy-3-phenylpropyl)-L-lysyl]-L-proline Dihydrate C21H33N3O6 83915-83-7
Gabapentin EP Impurity E Gabapentin USP Related Compound E ; Gabapentin Diacid ; 1-(carboxymethyl)cyclohexanecarboxylic acid C9H14O4 67950-95-2
Lisinopril EP Impurity C S,S,S-Diketopiperazine (lisinopril related compound A) C21H29N3O4 328385-86-0
Haloperidol Impurity 8 Chloro-fluoro-butyrophenone ; 4-chloro-1-(4- fluorophenyl)butan-1-one; 3-(4-Fluorophenylcarbonyl)-1- chloropropane C10H10ClFO 3874-54-2
Sitagliptin Triazole Hydrochloride Sitagliptin Impurity 20 HCl; 3-(Trifluoromethyl)-5,6,7,8-tetrahydro-[1,2,4]triazolo[4,3- a]pyrazine hydrochloride C6H7F3N4.ClH 762240-92-6
Moxifloxacin EP Impurity A Moxifloxacin USP RC A ; 8-Desmethoxy-8-Fluoro Moxifloxacin ; Moxifloxacin Difluoro Analog C20H21F2N3O3 151213-15-9
Fexofenadine EP Impurity E diphenyl(piperidin-4-yl)methanol C18H21NO 115-46-8
Glimepiride EP Impurity B USP Glimepiride Related Compound B ; Glimepiride Sulfonamide C16H21N3O4S 119018-29-0
Closantel EP Impurity B (2RS)-(4-Amino-2-chloro-5-methylphenyl)(4- chlorophenyl)ethanenitril C15H12Cl2N2 61437-85-2
Olanzapine EP Impurity A Olanzapine USP RC A ; 5-methyl-2-((2- nitrophenyl)amino)thiophene-3-carbonitrile C12H9N3O2S 138564-59-7
Prasugrel Impurity 12 2-bromo-1-cyclopropyl-2-(2-fluorophenyl)ethan-1-one C11H10BrFO 204205-33-4
Bisoprolol Carboxylic Acid Impurity 4-(2-Hydroxy-3-isopropylaminopropoxy)benzoic Acid C13H19NO4 72570-70-8
Moxifloxacin HCl 1-Cyclopropyl-6-fluoro-8-methoxy-7-[(4aS,7aS)-octahydro-6H- pyrrolo[3,4-b]pyridin-6-yl]-4-oxo-1,4-dihydroquinoline-3- carboxylic acid hydrochloride C21H25ClFN3O4 186826-86-8
Candesartan Cilexetil 1-[[(Cyclohexyloxy)carbonyl]oxy]ethyl 2-ethoxy-1-[[2'-(1H- tetrazol-5-yl)[1,1'-biphenyl]-4-yl]methyl]-1H-benzimidazole-7- carboxylate C33H34N6O6 145040-37-5
Omeprazole EP Impurity XI 2-Chloromethyl-3,5-dimethyl-4-methoxypyridine HCl C9H13Cl2NO 86604-75-3
Chlortalidone 2-Chloro-5-(1-hydroxy-3-oxo-1- isoindolinyl)benzenesulfonamide C14H11ClN2O4S 77-36-1
Cetirizine 4-Chlorobenzophenone Impurity (USP) (4-Chlorophenyl)phenylmethanone C13H9ClO 134-85-0
Piroxicam EP Impurity F 1-Methylethyl (1,1-dioxido-3-oxo-1,2-benzisothiazol-2(3H)- yl)acetate C12H13NO5S 76508-37-7
Metronidazole EP impurity C 2-(4-nitro-1H-imidazol-1-yl)ethan-1-ol C5H7N3O3 5006-69-9
Olmesartan EP Impurity C Dehydro Olmesartan Medoxomil ; Anhydro Olmesartan Medoxomil ; Olmesartan Medoxomil Olefinic Impurity (USP) C29H28N6O5 879562-26-2
Amlodipine EP Impurity F Amlodipine Dimethyl Ester; 2-[(2-Aminoethoxy)methyl]-4-(2- chlorophenyl)-1,4-dihydro-6-methyl-3,5-pyridinedicarboxylic Acid 3,5-dimethyl Ester C19H23ClN2O5 140171-66-0
Olmesartan Medoxomil Methyl Ether Olmesartan Medoxomil O-Methyl Analog C30H32N6O6 896419-17-3
Apixaban ethyl ester impuity Ethyl 1-(4-Methoxyphenyl)-7-oxo-6-(4-(2-oxopiperidin-1- yl)phenyl)-4,5,6,7-tetrahydro-1H-pyrazolo[3,4-c]pyridine-3- carboxylate C27H28N4O5 503614-91-3
Fenticonazole Nitrate EP Impurity C 1-(2-(2,4-dichlorophenyl)-2-((4- (phenylsulfonyl)benzyl)oxy)ethyl)-1H-imidazole C24H21Cl2N3O6S 80676-29-5
2-Amino-5-methyl-3-thiophenecarbonitrile C6H6N2S 138564-58-6
Alfuzosin EP Impurity A Alfuzosin USP Related Compound A ; Alfuzosin Tetradehydro Impurity C19H24ClN5O4 98902-29-5
Isosorbide Mononitrate 1,4:3,6-Dianhydro-D-glucitol 5-Nitrate,Isosorbide 5- Mononitrate C6H9NO6 16051-77-7
Telmisartan EP Impurity B Telmisartan USP Related Compound B ; Telmisartan Isomer C33H30N4O2 1026353-20-7
Guanine 2-amino-9H-purin-6(1H)-one C5H5N5O 73-40-5
Valaciclovir EP Impurity A/ Valganciclovir related compound B Valganciclovir related compound B, A ciclovir EP Impurity B ; Guanine C5H5N5O 73-40-5
Lansoprazole Sulfide N-Oxide 2-[[[3-Methyl-4-(2,2,2-trifluoroethoxy)-2-pyridinyl]methyl]thio]- 1H-benzimidazole N-Oxide C16H14F3N3O2S 163119-30-0
Desloratadine EP Impurity A Desloratadine EP Impurity A ; 11-Fluoro Dihydrodesloratadine C19H20ClFN2 298220-99-2
Aripiprazole Related Compound B 3,4-Dihydro-7-(4-hydroxybutoxy)-2(1H)-quinolinone C13H17NO3 889443-20-3
Memantine Related Compound E N-((1r,3R,5S,7r)-3,5-dimethyladamantan-1-yl)formamide C13H21NO 351329-88-9
Gabapentin 1-(Aminomethyl)cyclohexaneacetic acid C9H17NO2 60142-96-3
Prucalopride impurity A 4-amino-5-chloro2,3-dihydro-N(piperidin4-yl) benzofuran - 7carboxamide C14H18ClN3O2 137211-64-4
3-(4-Chlorophenyl)-1-isoindolinone 3-(p-Chlorophenyl)-phthalimidine; 3-(4- Chlorophenyl)isoindolinone; 3-(4-Chlorophenyl)-2,3-dihydro-1H- isoindol-1-one C14H10ClNO 2224-77-3
Diclazuril 6-Carboxamide (Impurity C) Diclazuril 6-Carboxamide C18H10Cl3N5O3 1797132-12-7
Apixaban methyl ester impuity 4,5,6,7-Tetrahydro-1-(4-hydroxyphenyl)-7-oxo-6-[4-(2-oxo-1- piperidinyl) phenyl]-1H-pyrazolo[3,4-c]pyridine-3-carboxamide C26H26N4O5 1074365-84-6
Febuxostat Amide Impurity 2-(3-Carbamoyl-4-isobutoxyphenyl)-4-methylthiazole-5- carboxylic acid C16H18N2O4S 1239233-86-3
Febuxostat Dicarboxylic Acid Impurity 2-[3-Carboxy-4-(2-methylpropoxy)phenyl]-4-methyl-5- thiazolecarboxylic acid C16H17NO5S 1239233-87-4
Fexofenadine EP Impurity C Decarboxylated degradant C31H39NO2 185066-37-9
(R)-Sitagliptin Methyl-Ester Impurity methyl (R)-3-amino-4-(2,4,5-trifluorophenyl)butanoate C11H12F3NO2 881995-69-3
Felbamate Related Compound A 3-hydroxy-2-phenylpropyl carbamate C10H13NO3 25451-53-0
Cetirizine EP Impurity B (RS)-2-[4-[(4-Chlorophenyl)phenylmethyl]piperazin-1-yl] acetic acid dihydrochloride C19H21ClN2O2 113740-61-7
Vortioxetine Sulfoxide C18H22N2OS 1429908-35-9
Apixaban Impurity 2 ethyl (Z)-2-chloro-2-(2-(3-methoxyphenyl)hydrazono)acetate C11H13ClN2O3 405872-78-8
Azilsartan Ethyl Ring-opening Impurity ethyl(Z)-2-ethoxy-1-((2'-(N'- ((ethoxycarbonyl)oxy)carbamimidoyl)-[1,1'-biphenyl]-4- yl)methyl)-1H-benzo[d]imidazole-7-carboxylate C29H30N4O6 1403474-75-8
Pregabalin EP Impurity C 2-hydroxy-2-phenylacetic acid,(Mandelic acid) C8H8O3 90-64-2
Ketoprofen 2-(3-benzoylphenyl)propanoic acid C16H14O3 22071-15-4
Metolazone EP Impurity A Metolazone USP RC C ; meta-Metolazone ; C16H16ClN3O3S 50869-25-5
Bisoprolol EP Impurity Q (2RS)-1-Isopropylamino-3-[4-(2-methoxyethoxy)methyl]- phenoxy-2-propanol C16H27NO4 1346604-00-9
Fosfomycin Trometamol EP Impurity C 2-amino-3-hydroxy-2-(hydroxymethyl)propyl dihydrogen phosphate C4H12NO6P 23001-39-0
Prasugrel HCl Desacetyloxy Impurity 1-cyclopropyl-2-(6,7-dihydrothieno[3,2-c]pyridin-5(4H)-yl)-2-(2- fluorophenyl) ethan-1-one hydrochloride C18H18FNOS 201049-78-7
Fexofenadine Impurity 1 methyl 2-(4-(4-chlorobutanoyl)phenyl)-2-methylpropanoate C15H19ClO3 154477-54-0
Albendazole EP Impurity B Methyl [5-(propylsulphinyl)-1Hbenzimidazol-2-yl] carbamate C12H15N3O3S 54029-12-8
Lansoprazole EP Impurity C Lansoprazole USP Related Compound B ; Lansoprazole Sulfide C16H14F3N3OS 103577-40-8
Fosfomycin Trometamol EP Impurity A (1,2-dihydroxypropyl)phosphonic acid C3H9O5P 84954-80-3
ROSUVASTATIN IMPURITY-K C22H26FN3O5S 1422954-12-8
Carbamazepine EP Impurity F H-dibenzo[b,f]azepine-5-carbonyl chloride C15H10ClNO 33948-22-0
LURASIDONE DP5- IMPURITY Lurasidone Sulfone C28H36N4O4S 1644295-09-9
Paracetamol EP Impurity J N-(4-chlorophenyl)acetamide C8H8ClNO 539-03-7
Atenolol EP Impurity B 2-[4-[(2RS)-2,3-dihydroxypropoxy]phenyl]acetamide C11H15NO4 61698-76-8
Pantoprazole Chloro Impurity 2-(chloromethyl)-3,4-dimethoxypyridine hydrochloride C8H11Cl2NO2 72830-09-2
Brexpiprazole Impurity 3 5-Hydroxy-2(1H)-quinolinone C9H7NO2 31570-97-5
Desloratadine Desloratadine ; Loratadine USP RC A ; Loratadine EP Impurity D C19H19ClN2 100643-71-8
Loratadine EP Impurity D Desloratadine ; Loratadine USP Related Compound A C19H19ClN2 100643-71-8
Phenoxymethylpenicillin EP Impurity B Glycolic acid phenyl ether ; 2-phenoxyacetic acid C8H8O3 122-59-8
Levodopa EP Impurity A Levodopa USP Related Compound A ; (2S)-2-Amino-3-(2,4,5- trihydroxyphenyl)propanoic acid C9H11NO5 27244-64-0
Nifedipine EP impurity A Dimethyl 2,6-dimethyl-4-(2-nitrophenyl)pyridine-3,5- dicarboxylate (nitrophenylpyridine analogue) C17H16N2O6 67035-22-7
Bumetanide EP Impurity A Bumetanide Related Compound B ; 3-nitro-4-phenoxy-5- sulfamoylbenzoic acid C13H10N2O7S 28328-53-2
Chlortalidone Impurity J 3-(4-chlorophenyl)-3-hydroxyisoindolin-1-one C14H10ClNO2 956-92-3
Allopurinol EP Impurity C Allopurinol USP RC C ; 5-(4H-1,2,4-triazol-4-yl)-1H-pyrazole-4- carboxamide C6H6N6O 1346604-13-4
Metoprolol Succinate Bis[(2RS)-1-[4-(2-methoxyethyl)phenoxy]-3-[(1-methylethyl)- amino]propan-2-ol] butanedioate 2C15H25NO3.C4H6O4 98418-47-4
Brimonidine EP Impurity C Quinoxalin-6-amine C8H7N3 6298-37-9
Atenolol 2-[4-[(2RS)-2-hydroxy-3-[(1-methylethyl)amino] propoxy]phenyl]acetamide C14H22N2O3 29122-68-7
Fenticonazole Nitrate EP Impurity A 1-(2,4-dichlorophenyl)-2-(1H-imidazol-1-yl)ethan-1-ol C11H10Cl2N2O 24155-42-8
Vildagliptin Chloroacetyl Nitrile (S)-Isomer (2S)-1-(Chloroacetyl)-2-Pyrrolidinecarbonitrile ; Vildagliptin Impurity 14 C7H9ClN2O 207557-35-5
Brexpiprazole Impurity 13 4-Bromo benzo[b]thiophene C8H5BrS 5118-13-8
Pregabalin Impurity 5 3-(2-amino-2-oxoethyl)-5-methylhexanoic acid C9H17NO3 181289-15-6
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