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
Albendazole EP Impurity D Desmethoxycarbonyl Albendazole Sulfone C10H13N3O2S 80983-34-2
Metoprolol EP Impurity G 2-(4-Hydroxyphenyl)ethanol C8H10O2 501-94-0
Prasugrel Hydrochloride 5-(2-cyclopropyl-1-(2-fluorophenyl)-2-oxoethyl)-4,5,6,7- tetrahydrothieno[3,2-c]pyridin-2-yl acetate hydrochloride C20H20FNO3S.ClH 389574-19-0
Metronidazole 2-(2-methyl-5-nitro-1H-imidazol-1-yl)ethan-1-ol C6H9N3O3 443-48-1
Rosuvastatin EP Impurity D N-[4-(4-Fluorophenyl)-6-(1-methylethyl)-5-[(1E)-2-[(2S,4R)- tetrahydro-4-hydroxy-6-oxo-2H-pyran-2-yl]ethenyl]-2- pyrimidinyl]-N-methyl-methanesulfonamide C22H26FN3O5S 503610-43-3
Atorvastatin Acid Methyl Ester (3R,5R)-7-[3-(Phenylcarbamoyl)-5-(4-fluorophenyl)-2-isopropyl- 4-phenyl-1H-pyrrol-1-yl]-3,5 -dihydroxyheptanoic acid methyl ester C34H37FN2O5 345891-62-5
Amlodipine EP Impurity H 2-Carboxybenzoyl Amlodipine C28H29ClN2O8 318465-73-5
Montelukast KSM-I Keto impurity C28H24ClNO2 184764-13-4
Metoprolol EP Impurity D (2RS)-3-[4-(2-Methoxyethyl)phenoxy]propane-1,2-diol C12H18O4 62572-90-1
Allopurinol EP Impurity B Allopurinol USP RC B ; 5-(formylamino)-1H-pyrazole-4 -carboxamide C5H6N4O2 22407-20-1
Nateglinide Impurity 1 N-[(TRANS-4-ETHYLCYCLOHEXYL)CARBONYL]-D- PHENYLALANINE C18H25NO3 105746-45- 0
Dabigatran Impurity 4 O-Desethyl Dabigatran Etexilate C32H37N7O5 212321-78-3
Fexofenadine EP Impurity B 2-(4-(1-hydroxy-4-(4-(hydroxydiphenylmethyl)piperidin-1-yl )butyl)phenyl)-2-methylpropanoic acid C32H39NO4 479035-75-1
Olmesartan EP Impurity B Olmesartan USP RC A ; Olmesartan gama-Lactone ; Olmesartan Lactone C24H24N6O2 849206-43-5
Bumetanide EP Impurity D 3-((2-ethylhexyl)amino)-4-phenoxy-5-sulfamoylbenzoic acid C21H28N2O5S 153012-65-8
Glipizide EP Impurity G methyl ((4-(2-(5-methylpyrazine-2- carboxamido)ethyl)phenyl)sulfonyl)carbamate C16H18N4O5S 33288-74-3
Nabumetone EP Impurity B (5RS)-5-(6-methoxynaphthalen-2-yl)-3-methylcyclohex-2-enone C18H18O2 343272-51-5
Tenteligliptin impurity 1 (2S)-4-Oxo-2-(3-thiazolidinylcarbonyl)-1-pyrrolidinecarboxylic Acid 1,1-Dimethylethyl Ester C13H20N2O4S 401564-36-1
Prasugrel Hydroxy Thiolactone Desacetyl hydroxyprasugrel ; 5-(2-cyclopropyl-1-(2- fluorophenyl)-2-oxoethyl)-7a-hydroxy-5,6,7,7a- tetrahydrothieno[3,2-c]pyridin-2(4H)-one C18H18FNO3S 947502-66-1
Emtricitabine 4-Amino-5-fluoro-1-[(2R,5S)-2-hydroxymethyl)-1,3-oxathiolan-5- yl]-2-(1H-pyrimidinone C8H10FN3O3S 143491-57-0
(2S)-1-(AMINOACETYL) PYRROLIDINE -2-CARBONITRILE C7H10N2O3 1846606-32-3
Lacosamide EP Impurity E Lacosamide BP Impurity E, Desacetyl desmethyl Lacosamide C10H14N2O2 175481-39-7
Olmesartan Ethyl Ester 4-(2-Hydroxypropan-2-yl)-2-propyl-1-({4-[2-(2H-1,2,3,4-tetrazol- 5-yl)phenyl]phenyl}methyl)-1H-imidazole-5-carboxylic acid ethyl ester C26H30N6O3 144689-23-6
Brexpiprazole 7-[4-(4-Benzo[b]thien-4-yl-1-piperazinyl)butoxy]-2(1H)- quinolinone C25H27N3O2S 913611-97-9
4-Dechloro-4-hydroxy Diclazuril (Impurity B) (+/-)-Benzeneacetonitrile, 4-Dechloro-4-hydroxy Diclazuril C17H10Cl2N4O3 112206-71-0
Diclazuril - Impurity A/Diclazuril 6-Carboxylic Acid 2-[3,5-Dichloro-4-[(4-chlorophenyl)cyanomethyl]phenyl]-2,3,4, 5-tetrahydro-3,5-dioxo-1,2,4-triazine-6-carboxylic Acid C18H9Cl3N4O4 862243-46-7
Brimonidine EP Impurity A Desbromo Brimonidine ; N-(Imidazolidin-2-ylidene)quinoxalin-6- amine C11H11N5 91147-43-2
Loratadine Ethyl 4-(8-chloro-5,6-dihydro-11H-benzo[5,6]cyclohepta[1,2-b] pyridin-11-ylidene)-1-piperidinecarboxylate C22H23ClN2O2 79794-75-5
Desloratadine EP Impurity C Loratadine ; Ethyl 4-(8-chloro-5,6-dihydro-11H- benzo[5,6]cyclohepta[1,2-b]pyridin-11-ylidene)-1- piperidinecarboxylate C22H23ClN2O2 79794-75-5
Lacidipine Diethyl 4-{o-[(E)-2-tert-butoxycarbonylethenyl]phenyl}-2,6- dimethyl-1,4-dihydropyridine-3,5-dicarboxylate C26H33NO6 103890-78-4
Pirfenidone 5-methyl-1-phenylpyridin-2(1H)-one C12H11NO 53179-13-8
Olmesartan Anhydro Acid Ethyl Ester Olmesartan Olefinic Acid Ethyl Ester C26H28N6O2 172875-87-5
Lacosamide EP Impurity K 2-acetamido-N-benzylacrylamide C12H14N2O2 86921-49-5
Brexpiprazole Impurity 8 7-(4-(4-(benzo[b]thiophen-4-yl)piperazin-1-yl)butoxy) -3,4-dihydroquinolin-2(1H)-one C25H29N3O2S 913612-07-4
Olmesartan Impurity 4 4,5-bis(chloromethyl)-1,3-dioxol-2-one C5H4Cl2O3 1443544-27-1
Meloxicam EP Impurity B Meloxicam USP Related Compound B ; 5-methylthiazol-2-amine C4H6N2S 7305-71-7
Aripiprazole EP Impurity A 3,4-Dihydro-7-hydroxyquinoline-2(1H)-one C9H9NO2 22246-18-0
Leflunomide Impurity 2 3-Methylisoxazole-4-carboxylic Acid C5H5NO3 17153-20-7
Bupivacaine EP Impurity C 1-(2,6-Dimethylphenyl)-1,5,6,7-tetrahydro-2H-azepin-2-one C14H17NO 1797894-80-4
Tramadol EP Impurity B 1-(3'-methoxy-3,4,5,6-tetrahydro-[1,1'-biphenyl]-2-yl)-N,N- dimethylmethanamine hydrochloride C16H25NO2 66170-32-9
Felbamate Dimer (carbonylbis(oxy))bis(2-phenylpropane-3,1-diyl) dicarbamate C21H24N2O7 1796927-91-7
Closantel N-[5-chloor-4-[(4-chloorfenyl)-cyanomethyl]-2-methylfenyl]-2- hydroxy-3,5-di-joodbenzamide C22H14Cl2I2N2O2 57808-65-8
Melantonin N-(2-(5-methoxy-1H-indol-3-yl)ethyl)acetamide C13H16N2O2 73-31-4
Aripiprazole EP Impurity E Aripiprazole related compound G ; Dehydro Aripiprazole Impurity, 7-(4-(4-(2,3-dichlorophenyl)piperazin-1-yl) butoxy)quinolin-2(1H)-one, C23H25Cl2N3O2 129722-25-4
Hydrochlorothiazide 6-Chloro-3,4-dihydro-2H-1,2,4-benzothiadiazine-7-sulfonamide C7H8ClN3O4S2 58-93-5
Prasugrel Impurity of KSM-ll 2,2-dibromo-1-cyclopropyl-2-(2-fluorophenyl) ethanone C11H9Br2FO 2091625-61-3
Fexofenadine (R)-2-(4-(1-hydroxy-4-(4-(hydroxydiphenylmethyl)piperidin-1- yl)butyl)phenyl)-2-methylpropanoic acid C32H39NO4 83799-24-0
Diclofenac Sodium Aceclofenac EP Impurity A ; Sodium 2-[(2,6- dichlorophenyl)amino]phenyl]acetate C14H10Cl2NNaO2 15307-79-6
Montelukast EP Impurity D / E C41H46ClNO5S2 2125943-58-8
Rabeprazole EP Impurity D Rabeprazole USP Related Compound B , Rabeprazole N-Oxide C18H21N3O4S 924663-38-7
Mycophenolate Mofetil 6-[(7-Hydroxy-5-methoxy-4-methyl-1-oxo-3H-isobenzofuran-6- yl)]-4-methyl-hex-4-enoic acid 2-morpholinoethyl ester ; 2- (Morpholin-4-yl)ethyl (4E)-6-(4-hydroxy-6-methoxy-7-methyl-3- oxo-1,3- dihydroisobenzofuran-5-yl)-4-methylhex-4-enoate C23H31NO7 128794-94-5
Levocetirizine (R)-2-(2-(4-((4-chlorophenyl)(phenyl)methyl)piperazin-1- yl)ethoxy)acetic acid C21H25ClN2O3 130018-77-8
Diltiazem HCl (2S,3S)-5-[2-(Dimethylamino)ethyl]-2-(4-methoxyphenyl)-4-oxo- 2,3,4,5-tetrahydro-1,5-benzothiazepin-3-yl acetate hydrochloride C22H26N2O4S 42399-41-7
Enalapril Alanyl Proline Enalapril Dipeptide Impurity ;L-Alanyl-L-proline C8H14N2O3 13485-59-1
3-Chlorobenzophenone C13H9ClO 1016-78-0
Atomoxetine Hydrochloride (R)-N-Methyl-(2-methylphenoxy)benzenepropanamine Hydrochloride C17H22ClNO 82248-59-7
Chlorzoxazone Related Compound A 2-Amino-4-chlorophenol C6H6ClNO 95-85-2
Vildagliptin Amino Alcohol Impurity 1-Amino-3-adamantanol ; Vildagliptin Impurity 15 C10H17NO 702-82-9
4-Methylacetophenone C9H10O 122-00-9
Mesalazine EP Impurity A 4-aminophenol, Mesalamine EP Impurity A C6H7NO 123-30-8
Aspartame Impurity 1 Paracetamol EP Impurity K/ Mesalazine EP Impurity A C6H7NO 123-30-8
Paracetamol EP Impurity K 4-aminophenol C6H7NO 123-30-8
Donepezil EP Impurity B 5,6-dimethoxy-2,3-dihydro-1H-inden-1-one C11H12O3 2107-69-9
Mesalazine EP Impurity G 2,5-dihydroxybenzoic acid.; Mesalamine Ep Impurity G C7H6O4 490-79-9
Metamizole EP Impurity C 1,5-dimethyl-4-(methylamino)-2-phenyl-2,3-dihydro-1H-pyrazol- 3-one ; 4-Methylamino Antipyrine C12H15N3O 519-98-2
TIROFIBAN IMPURITY B 4-(4-Chlorobutyl)pyridine hydrochloride C9H13Cl2N 149463-65-0
Atropine EP Impurity B (1R,3r,5S)-8-azabicyclo[3.2.1]octan-3-yl 3-hydroxy-2- phenylpropanoate C16H21NO3 16839-98-8
Ciprofloxacin EP Impurity A 7-Chloro-1-cyclopropyl-6-fluoro-3-carboxy-1,4-dihydro-4- oxoquinoline; Fluoroquinolonic Acid C13H9ClFNO3 86393-33-1
Prasugrel Impurity 7 5,6,7,7a-tetrahydrothieno[3,2-c]pyridin-2(4H)-one hydrochloride C7H10ClNOS 115473-15-9
Omeprazole EP Impurity I Omeprazole USP RC I C17H19N3O5S 158812-85-2
Rabeprazole EP Impurity I Rabeprazole Sulfone N-Oxidele C18H21N3O5S 924663-37-6
Nifedipine EP impurity B Dimethyl 2,6-dimethyl-4-(2-nitrophenyl)pyridine-3,5- dicarboxylate (nitrophenylpyridine analogue) C17H16N2O5 50428-14-3
Cetirizine Dihydrochloride (RS)-2-[2-[4-[(4-Chlorophenyl)phenylmethyl]piperazin-1-yl] ethoxy]acetic acid dihydrochloride C21H26Cl2N2O3 83881-52-1
Ondansetron EP Impurity F 2-methyl-1H-imidazole C4H6N2 693-98-1
Cetirizine 4-Chlorobenzhydrol Impurity Meclizine USP RC A ; 4-Chlorobenzhydrol C13H11ClO 119-56-2
(4S,6S,12aS)-4-(dimethylamino)-1,4,4a,5,5a,6,11,12a-octahydro- 3,6,10,12,12a-pentahydroxy-6-methyl-1,11-dioxonaphthacene- 2-carboxamide C22H24N2O8 60-54-8
Venlafaxine EP Impurity C N,N-Didesmethyl Venlafaxine Hydrochloride C15H24ClNO2 130198-05-9
Diclofenac EP Impurity E 1,3-Dihydro-2H-indol-2-one C8H7NO 59-48-3
Valsartan (S)-N-[p-(o-1H-Tetrazol-5-ylphenyl)benzyl]-N-valeryl-L-valine C24H29N5O3 137862-53-4
Diacetylguanine C9H9N5O3 3056-33-5
Pioglitazone EP impurity A 5-Hydroxy Pioglitazone Impurity ; Pioglitazone 5-Hydroxy Metabolite C19H20N2O4S 625853-74-9
Pregabalin EP Impurity D 1-Methylethyl (2RS)-2-hydroxy-2-phenylacetate C11H14O3 4118-51-8
Donepezil Hydrochloride (±)-2-[(1-Benzyl-4-piperidyl)methyl]-5,6-dimethoxy-1-indanone hydrochloride C24H30ClNO3 120011-70-3
Enalapril Impurity 1 Phenylpropanoic acid, Benzenepropionic acid, 3-Phenyl-n- propionic acid C9H10O2 501-52-0
Pirfenidone EP Impurity D Bromobenzene C6H5Br 108-86-1
Dabigatran Etexilate N-[[2-[[[4- [[[(Hexyloxy)carbonyl]amino]iminomethyl]phenyl]amino]methy l]-1-methyl-1H-benzimidazol-5-yl]carbonyl]-N-2-pyridinyl-β- Alanine Ethyl Ester C34H41N7O5 211915-06-9
Olmesartan Impurity 7 ethyl 4-(prop-1-en-2-yl)-2-propyl-1H-imidazole-5-carboxylate C12H18N2O2 157356-73-5
Haloperidol EP Impurity H Haloperidol N-Oxide C21H23ClFNO3 148406-51-3
Olmesartan Methyl Ketone Olmesartan Acetyl Analog C25H28N6O2 1227626-45-0
Apixaban morpholine lactum impurity 3-Morpholino-1-(4-(2-oxopiperidin-1-yl)phenyl)-5,6- dihydropyridin-2(1H)-one C20H25N3O3 545445-44-1
Lansoprazole EP Impurity A Lansoprazole N-Oxide C16H14F3N3O3S 213476-12-1
Tolterodine monoisopropyl analog C19H25NO 480432-14-2
Nifedipine 3,5-dimethyl 2,6-dimethyl-4-(2-nitrophenyl)-1,4- dihydropyridine-3,5-dicarboxylate C17H18N2O6 21829-25-4
Vortioxetine 1-[2-[(2,4-Dimethylphenyl)thio]phenyl]piperazine C18H22N2S 508233-74-7
Leflunomide EP Impurity F 5-methyl-N-(2-(trifluoromethyl)phenyl)isoxazole-4-carboxamide C12H9F3N2O2 1403564-06-6
Memantine Related Compound D (1r,3R,5S,7r)-1-bromo-3,5-dimethyladamantane C12H19Br 941-37-7
Tropicamide EP Impurity C Tropicamide related compound C C9H10O3 552-63-6
Atropine EP Impurity C Tropic acid, 2-Phenylhydracrylic acid, 3-Hydroxy-2- phenylpropionic acid C9H10O3 552-63-6
Guaifenesin EP Impurity D Dianisylglycerol ; 1,3-bis(2-methoxyphenoxy)propan-2-ol C17H20O5 16929-60-5
Dianisylglycerol 1,3-Bis(2-methoxyphenoxy)-2-propanol , Guaifenesin EP Impurity D C17H20O5 16929-60-5
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