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
Gliclazide EP Impurity C Gliclazide BP Impurity C ; Ethyl [(4-methylphenyl)sulfonyl]- carbamate C10H13NO4S 5577-13-9
Brexpiprazole Impurity 16 7-(4-Bromobutoxy)-quinoline-2(1H)-one C13H14BrNO2 203395-59-9
Duloxetine Hydrochloride (S)-N-Methyl-γ-(1-naphthalenyloxy)-2-thiophenepropanamine Hydrochloride C18H20ClNOS 136434-34-9
Haloperidol 4-(4-(4-Chlorophenyl)-4-hydroxy-1-piperidinyl)-1-(4- fluorophenyl)-1-butanone C21H23ClFNO2 52-86-8
3-Acetyl-L-tyrosine Methyl Ester Hydrochloride C12H15NO4 57085-32-2
Piroxicam EP Impurity D Methyl (1,1-dioxido-3-oxo-1,2-benzisothiazol-2(3H)-yl)acetate C10H9NO5S 6639-62-9
Phenylephrine EP Impurity E Phenylephrine Related Compound E ; 2-(benzylmethylamino)-1-(3-hydroxyphenyl)ethanone ; benzylphenylephrone C16H17NO2 56917-44-3
Bumetanide EP Impurity B Bumetanide Related Compound A ; 3-amino-4-phenoxy-5- sulfamoylbenzoic acid ; Desbutyl Bumetanide C13H12N2O5S 28328-54-3
Ivabradine Hydrochloride (S)-3-(3-(((4,5-dimethoxy-1,2 dihydrocyclobutabenzen1yl)methyl)(methyl)amino)propyl)-7,8- dimethoxy-4,5-dihydro-1Hbenzo[d]azepin-2(3H)-one hydrochloride C27H37ClN2O5 148849-67-6
Ethyl 3-(2-Pyridylamino)propionate C10H14N2O2 103041-38-9
Vildagliptin Chloroacetyl Nitrile (R)-Isomer Vildagliptin Chloroacetyl Nitrile (R)-Isomer C7H9ClN2O 565452-98-4
Meloxicam EP Impurity E methyl 4-hydroxy-2-methyl-2H-1,2-benzothiazine-3-carboxylate 1,1-dioxide C11H11NO5S 35511-15-0
Piroxicam EP Impurity J Methyl 4-hydroxy-2-methyl-2H-1,2-benzothiazine-3- carboxylate 1,1-dioxide C11H11NO5S 35511-15-0
1-Benzhydrylpiperazine C17H20N2 841-77-0
Pantoprazole 5-(difluoromethoxy)-2-(((3,4-dimethoxypyridin-2- yl)methyl)sulfinyl)-1H-benzo[d]imidazole C16H15F2N3O4S 102625-70-7
Glipizide EP Impurity B cyclohexanamine C6H13N 108-91-8
Albendazole EP Impurity A 5-(Propylthio)-1H-benzimidazol-2-amine C10H13N3S 80983-36-4
Piroxicam EP Impurity A pyridin-2-amine C5H6N2 504-29-0
Paracetamol EP Impurity G (E)-1-(4-hydroxyphenyl)ethanone oxime C8H9NO2 198712-64-0
Mycophenolate Mofetil EP Impurity E Mycophenolic Acid Methyl Ester C18H22O6 31858-66-9
Celecoxib Impurity 3 4-(5-phenyl-3-(trifluoromethyl)-1H-pyrazol-1- yl)benzenesulfonamide C16H12F3N3O2S 170569-87-6
3-(3,4-Dimethoxyphenyl)-L-Alanine C11H15NO4 32161-30-1
Picolonic acid Pyridine-2-carboxylic Acid C6H5NO2 98-98-6
Losartan Related Compound B 4’-[(2-butyl-4-chloro-5-hydroxymethyl)-1H-imidazol-1- yl)methyl]-[1,1’-Biphenyl]-2-carbonitrile C22H22ClN3O 114772-55-3
Aripiprazole 7-(4-(4-(2,3-dichlorophenyl)piperazin-1-yl)butoxy)-3,4- dihydroquinolin-2(1H)-one C23H27Cl2N3O2 129722-12-9
Ethacrynic Acid 2-[2,3-Dichloro-4-(2-methylene-1-oxobutyl)phenoxy]acetic Acid C13H12Cl2O4 58-54-8
Lacosamide EP Impurity A (S)-2-(Acetylamino)-3-methoxy-N-(phenylmethyl)propanamide C13H18N2O3 175481-37-5
Quetiapine EP Impurity D Quetiapine Dimer Impurity ; Quetiapine Bis(dibenzothiazepinyl) piperazine Impurity (USP) C30H24N4S2 945668-94-0
Apixaban acid impuity 4,5,6,7-Tetrahydro-1-(4-methoxyphenyl)-7-oxo-6-[4-(2-oxo-1- piperidinyl) phenyl]-1H-pyrazolo[3,4-c]pyridine-3-carboxylic acid C25H24N4O5 503614-92-4
Allopurinol EP Impurity E Allopurinol USP RC E ; ethyl 5-(formylamino)-1H-pyrazole-4- carboxylate C7H9N3O3 31055-19-3
Olmesartan Medoxomil (5-Methyl-2-oxo-2H-1,3-dioxol-4-yl)methyl 4-(2-hydroxypropan- 2-yl)-2-propyl-1-({4-[2-(2H-1,2,3,4-tetrazol-5- yl)phenyl]phenyl}methyl)-1H-imidazole-5-carboxylate C29H30N6O6 144689-63-4
Azilsartan Impurity B 1-((2'-carbamoyl-[1,1'-biphenyl]-4-yl)methyl) -2-ethoxy-1H-benzo[d]imidazole-7-carboxylic acid C24H21N3O4 1696392-11-6
Apixaban Impurity 4 ethyl 6-(4-aminophenyl)-1-(4-methoxyphenyl)-7-oxo-4,5,6,7- tetrahydro-1H-pyrazolo[3,4-c]pyridine-3-carboxylate C22H22N4O4 503615-07-4
Nabumetone EP Impurity A 3-(6-methoxynaphthalen-2-yl)-5-methylcyclohexanone C18H20O2 343272-52-6
Vildagliptin Chloroacetyl Amide (S)-Isomer (S)-1-(2-chloroacetyl)pyrrolidine-2-carboxamide C7H11ClN2O2 214398-99-9
Bupivacaine EP Impurity D (2RS)-2,6-Dichloro-N-(2,6-dimethylphenyl)hexanamide C14H19Cl2NO 1037184-07-8
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 C10H10ClN3O2 23680-84-4
Tenteligliptin impurity B tert-butyl (2S,4S)-4-(4-(3-methyl-1-phenyl-1H-pyrazol-5- yl)piperazin-1-yl)-2-(thiazolidine-3-carbonyl)pyrrolidine-1- carboxylate C27H38N6O3S 401566-80-1
Atenolol EP Impurity F 2,2'-[(1-Methylethyl)iminobis(2-hydroxypropan-3,1diyloxy-4,1- phenylene)]diacetamide C25H35N3O6 87619-83-8
Apremilast Impurity 1 3-Ethoxy-4-methoxy-[(methylsulfonyl)methyl]-(S)- benzenemethanamine C12H19NO4S 608141-42-0
Ondansetron EP Impurity G 3-((1H-imidazol-1-yl)methyl)-9-methyl-1,2,3,9-tetrahydro-4H- carbazol-4-one C17H17N3O 99614-03-6
4-Methyl L-Aspartate Hydrochloride 4-Methyl L-Aspartate Hydrochloride C5H10ClNO4- 16856-13-6
Amlodipine 3-ethyl 5-Methyl 2-((2-aMinoethoxy)Methyl)-4-(2-chlorophenyl) 6-Methyl-1,4-dihydropyridine-3,5-dicarboxylate Maleate C30H35ClN2O12S 88150-47-4
Paracetamol EP Impurity C N-(3-chloro-4-hydroxyphenyl)acetamide C8H8ClNO2 3964-54-3
3-Des(allylthio)methyl-3-chloromethyl Althiazide 6-Chloro-3-(chloromethyl)-3,4-dihydro-2H-1,2,4- benzothiadiazine-7-sulfonamide 1,1-Dioxide C8H9Cl2N3O4S2 1824-47-1
cis-Haloperidol N-Oxide 4-[cis-4-(4-Chlorophenyl)-4-hydroxy-1-oxido-1-piperidinyl]-1-(4- fluorophenyl)-1-butanone C21H23ClFNO3 150214-94-1
Alfuzosin EP Impurity E N-[3-[(4-Amino-6,7-dimethoxyquinazolin-2-yl)(methyl)aminopropyl]formamide hydrochloride C15H21N5O3 1026411-59-5
4-Hyrdroxy Felbamate 2-(4-Hydroxyphenyl)-1,3-propanediyl Dicarbamate C11H14N2O5 109482-28-2
Erythromycin E-Base; E-Mycin; Erythromycin A C37H67NO13 114-07-8
Mesalazine EP Impurity C 2-aminophenol.; Mesalamine EP Impurity C C6H7NO 95-55-6
Mycophenolate Mofetil EP Impurity F Mycophenolic Acid C17H20O6 24280-93-1
Azilsartan Impurity D 3-((2'-(N'-hydroxycarbamimidoyl)-[1,1'-biphenyl]-4-yl) methyl)-2-oxo-2,3-dihydro-1H-benzo[d]imidazole-4-carboxylic acid C22H18N4O4 1821386-21-3
Brexpiprazole N-Oxide 7-[4-(4-Benzo[b]thien-4-yl-1-oxido-1-piperazinyl)butoxy] -2(1H)-quinolinone C25H27N3O3S 1191900-58-9
Glimepiride 1-[[p-[2-(3-Ethyl-4-methyl-2-oxo-3-pyrroline-1-carboxamido) ethyl]phenyl]sulfonyl]-3-(trans-4-methylcyclohexyl)urea C24H34N4O5S 93479-97-1
Lidocaine EP Impurity A Bupivacaine EP Impurity F ; Lidocaine USP Impurity A ; 2,6- Dimethylaniline C8H11N 87-62-7
Labetalol 2-hydroxy-5-((S)-1-hydroxy-2-(((S)-4-phenylbutan-2- yl)amino)ethyl) benzamide hydrochloride C19H25ClN2O3 32780-64-6
Atomoxetine EP Impurity A N-methyl-3-phenoxy-3-phenylpropan-1-amine hydrochloride C16H20ClNO 873310-33-9
Leflunomide EP Impurity D 5-methylisoxazole-4-carboxylic acid C5H5NO3 42831-50-5
Chlortalidone EP impurity C Chlorthalidone Acid Ethyl Ester ; 2-[3-(Aminosulfonyl)-4- chlorobenzoyl]-benzonic acid ethyl ester C16H14ClNO5S 92874-73-2
Buspirone Hydrochloride 8-[4-[4-(Pyrimidin-2-yl)piperazin-1-yl]butyl]-8-azaspiro[4.5]- decane-7,9-dione hydrochloride C21H32ClN5O2 33386-08-2
Irbesartan Bromo N2-Trityl Impurity 5-(4'-Bromomethyl-1,1'-biphenyl-2-yl)-1-triphenylmethyl-1H- tetrazole C33H25BrN4 124750-51-2
Olmesartan Impurity (N-(Triphenylmethyl) 1H-Tetrazole, 5-[4'-(bromomethyl)[1,1'-biphenyl]-2-yl]-1- (triphenylmethyl) C33H25BrN4 124750-51-2
Losartan Bromo N1-Trityl Impurity C33H25BrN4 124750-51-2
Candesartan Bromo N1-Trityl Impurity 5-(4'-Bromomethyl-1,1'-biphenyl-2-yl)-1-triphenylmethyl-1H- tetrazole C33H25BrN4 124750-51-2
Sitagliptin Impurity 19 (R)-3-((tert-butoxycarbonyl)amino)-4-(2,4,5- trifluorophenyl)butanoic acid C15H18F3NO4 486460-00-8
Paracetamol EP Impurity I 1-(2-hydroxyphenyl)ethan-1-one C8H8O2 118-93-4
Azithromycin C38H74N2O13 117772-70-0
Aripiprazole Bromobutoxyquinoline Impurity 7-(4-Bromobutoxy)-3,4-dihydroquinolin-2-one C13H16BrNO2 129722-34-5
Fenticonazole Nitrate 1-(2-(2,4-dichlorophenyl)-2-((4-(phenylthio)benzyl)oxy)ethyl)- 1H-imidazole nitrate C24H21Cl2N3O4S 73151-29-8
Lansoprazole EP Impurity E 2-Mercaptobenzimidazole C7H6N2S 583-39-1
Rabeprazole EP Impurity F Rabeprazole USP Related Compound C ; Lansoprazole EP Impurity E C7H6N2S 583-39-1
Gabapentin EP Impurity B Gabapentin USP Related Compound B;(1- Cyanocyclohexyl)acetic acid C9H13NO2 133481-09-1
Esomeprazole EP Impurity D Esomeprazole USP Related Compound A ; Esomeprazole USP RC A ; Omeprazole Sulfone C17H19N3O4S 88546-55-8
Omeprazole EP Impurity D Esomeprazole EP Impurity D ; Esomeprazole USP Related Compound A C17H19N3O4S 88546-55-8
N1-Trityl Olmesartan Medoxomil 4-(1-Hydroxy-1-methylethyl)-2-propyl-1-[[2’-[1- (triphenylmethyl)-1H-tetrazol-5-yl][1,1’-biphenyl]-4-yl]methyl]- 1H-Imidazole-5-carboxylic Acid (5-Methyl-2-oxo-1,3-dioxol-4- yl)Methyl Ester C48H44N6O6 144690-92-6
BROMO(2-FLUROPHENYL)ACETIC ACID C8H6BrFO2 134770-09-5
Ivabradine Impurity 3 1-bromo-3-chloropropane C3H6BrCl 109-70-6
Alfuzosin HCl (RS)-N-[3-[(4-Amino-6,7-dimethoxyquinazolin-2- yl)(methyl)amino]propyl]tetrahydrofuran-2-carboxamide hydrochloride C19H28ClN5O4 81403-68-1
N- nitrosodiethylamine (NDEA). N-Ethyl-N-nitrosoethanamine; DEN; DENA; Diethylnitrosamide C4H10N2O 55-18-5
Desloratadine N-Methyl Impurity Loratadine EP Impurity G ;Loratadine USP RC B C20H21ClN2 38092-89-6
Loratadine EP Impurity G N-Methyl Desloratadine ; Loratadine USP Related Compound B C20H21ClN2 38092-89-6
Metronidazole EP impurity B 4-nitro-1H-imidazole C3H3N3O2 3034-38-6
Ondansetron EP Impurity H 3-((2-methyl-1H-imidazol-1-yl)methyl)-1,2,3,9-tetrahydro-4H- carbazol-4-one C17H17N3O 99614-14-9
Carbamazepine EP Impurity D 5H-Dibenzo[b,f]azepine C14H11N 256-96-2
Oxcarbazepine EP Impurity E 5H-dibenzo[b,f]azepine, Iminostilbene C14H11N 256-96-2
Mesalazine EP Impurity B 3-aminophenol, Mesalamine EP Impurity B C6H7NO 591-27-5
Piroxicam EP Impurity L 1-methylethyl 4-hydroxy-2-methyl-2H-1,2-benzothiazine-3- carboxylate 1,1-dioxide C13H15NO5S 118854-48-1
Meloxicam EP Impurity F Meloxicam USP Related Compound C ; isopropyl 4-hydroxy-2-methyl-2H-1,2-benzothiazine-3- carboxylate 1,1-dioxide C13H15NO5S 118854-48-1
Chlortalidone EP impurity B Chlorthalidone USP RC A ; Chlorthalidone Acid ; 2-[3-(Aminosulfonyl)-4-chlorobenzoyl]-benzonic acid C14H10ClNO5S 5270-74-6
Mesalazine EP Impurity I 2-hydroxy-5-(phenyldiazenyl)benzoic acid (phenylazosalicylic acid).; Mesalamine EP Impurity I C13H10N2O3 3147-53-3
(3Z)-4-Hydroxy-4-(6-methoxy-2-naphthalenyl)-3-buten- 2-one C15H14O3 218768-11-7
Amlodipine EP impurity A Amlodipine USP RC D,Phthaloyl Amlodipine C28H27ClN2O7 88150-62-3
Montelukast EP Impurity C Montelukast USP Related Compound A ; Montelukast Sulfoxide C35H36ClNO4S 909849-96-3
Rabeprazole EP Impurity A Rabeprazole USP Related Compound D ; Rabeprazole Sulfone ; C18H21N3O4S 117976-47-3
Rivaroxaban 5-Chloro-N-[[(5S)-2-oxo-3-[4-(3-oxo-4-morpholinyl)phenyl]-5- oxazolidinyl] methyl]-2-thiophenecarboxamide C19H18ClN3O5S 366789-02-8
Lidocaine Anestacon ; 2-(Diethylamino)-N-(2,6-dimethylphenyl)acetamide C14H22N2O 137-58-6
Desloratadine N-Acetyl Impurity Desloratadine N-Acetyl Impurity ; N-Acetyl Desloratadine C21H21ClN2O 117796-52-8
Paracetamol EP Impurity H 4-acetamidophenyl acetate C10H11NO3 2623-33-8
Ethacrynic Acid impurity A 4-Butanoyl-2, 3-dichlorophenoxy acetic acid C12H12Cl2O4 1217-67-0
Teriflunomide Impurity 18 2-cyano-N-(4-(trifluoromethyl)phenyl)acetamide C10H7F3N2O 24522-30-3
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