KARPSCHEM LABORATORIES

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Company Name:KARPSCHEM LABORATORIES PVT. LTD.
Tel:+91 7249203006;+91-9371639228
Email:info@karpschem.in
WebSite:www.karpschem.in
Product Total:829
CB Index:58
Nationality:India
      we are specialty chemicals and intermediates manufacturers, also can do CRO.
Product Name MF CAS Details
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
Leflunomide EP Impurity H 2-cyano-N-(4-(trifluoromethyl)phenyl)acetamide C10H7F3N2O 24522-30-3
Tirofiban (S)-2-(butylsulfonamido)-3-(4-(4-(piperidin-4- yl)butoxy)phenyl)propanoic acid C22H36N2O5S 144494-65-5
Hydrochlorothiazide EP Impurity B Hydrochlorothiazide USP Related Compound A C6H8ClN3O4S2 121-30-2
Mesalazine EP Impurity R 2-hydroxy-3-nitrobenzoic acid (3-nitrosalicylic acid). ; Mesalamine EP Impurity R C7H5NO5 85-38-1
Mesalazine EP Impurity F 3-amino-2-hydroxybenzoic acid (3-aminosalicylic acid).; Mesalamine EP Impurity F C7H7NO3 570-23-0
Thiamazole C4H6N2S 60-56-0
Memantine HCl 3,5-Dimethyltricyclo[3.3.1.13,7]decan-1-amine hydrochloride C12H22ClN 41100-52-1
Oxcarbazepine 10-oxo-10,11-dihydro-5H-dibenzo[b,f]azepine-5-carboxamide C15H12N2O2 28721-07-5
Lacosamide EP Impurity D (2R)-2-Amino-3-methoxy-N-(phenylmethyl)-propanamide. BP Impurity D C11H16N2O2 196601-69-1
Amlodipine EP Impurity E Amlodipine Diethyl Ester; 2-[(2-Aminoethoxy)methyl]-4-(2- chlorophenyl)-1,4-dihydro-6-methyl-3,5-pyridinedicarboxylic Acid 3,5-Diethyl Ester C21H27ClN2O5 140171-65-9
Lacosamide EP Impurity F Desmethyl Lacosamide(Hydroxy Imp) C12H16N2O3 175481-38-6
Quetiapine EP Impurity I HCl Salt Quetiapine Desethoxy Impurity (USP) ; Quetiapine Alcohol Impurity C19H21N3OS 329218-14-6
Atenolol EP Impurity E 2,2'-[2-Hydroxypropan-1,3-diylbis(oxy-4,1- phenylene)diacetamide C19H22N2O5 141650-31-9
Desloratadine N-Hydroxy Impurity C19H19ClN2O 1193725-73-3
Azilsartan medoxomil potassium C30H25KN4O8 863031-24-7 863031-21-4
Azilsartan Impurity 4 Azilsartan Methyl Ester ; methyl 2-ethoxy-1-((2'-(5-oxo-4,5- dihydro-1,2,4-oxadiazol-3-yl)-[1,1'-biphenyl]-4-yl)methyl)-1H- benzo[d]imidazole-7-carboxylate C26H22N4O5 147403-52-9
Olanzapine Amino Impurity 2-(2-Aminoanilino)-5-methylthiophene-3-carbonitrile C12H11N3S 873895-41-1
Haloperidol EP Impurity B Haloperidol Related Compound B C21H23ClFNO2 1391052-53-1
Donepezil hydroxy impurity 2,3-Dihydro-2-[hydroxy[1-(phenylmethyl)-4-piperidinyl]methyl]- 5,6-dimethoxy-1H-inden-1-one C24H29NO4 197010-20-1
Leflunomide EP Impurity G 5-methyl-N-(p-tolyl)isoxazole-4-carboxamide C12H12N2O2 724429-16-7
Tenegliptin impurity A 1-(3-methyl-1-phenyl-1H-pyrazol-5-yl)piperazine C14H18N4 401566-79-8
Azilsartan Impurity A methyl 1-((2'-carbamoyl-[1,1'-biphenyl]-4-yl)methyl) -2-ethoxy-1H-benzo[d]imidazole-7-carboxylate C25H23N3O4 147404-76-0
Montelukast (3RS)-Hydroxy Propanol C29H28ClNO2 959235-68-8
Descyano Diclazuril Ketone (Impurity D) 2-[3,5-Dichloro-4-(4-chlorobenzoyl)phenyl]-1,2,4-triazine- 3,5(2H,4H)-dione C16H8Cl3N3O3 133648-81-4
Quetiapine Fumarate 2-[2-(4-dibenzo[b,f][1,4]thiazepin-11-yl-1- piperazinyl)ethoxy]ethanol hemifumarate C25H29N3O6S 111974-72-2
Dabigatran Impurity 9 Dabigatran Etexilate Methyl Ester Analog C33H39N7O5 211915-00-3
Prasugrel Impurity 9 1-cyclopropyl-2-(2-fluorophenyl)-2-hydroxyethan-1-one C11H11FO2 1100905-45-0
Bupivacaine EP Impurity E 6-(Butylamino)-N-(2,6-dimethylphenyl)hexanamide C18H30N2O 1330172-81-0
Cetirizine EP Impurity F 2-(2-(4-benzhydrylpiperazin-1-yl)ethoxy)acetic acid C21H26N2O3 83881-53-2
(R)-Vildagliptin (R)-1-(((1r,3S,5R,7S)-3-hydroxyadamantan-1- yl)glycyl)pyrrolidine-2-carbonitrile C17H25N3O2 1036959-27-9
Vildagliptin Carboxamide Impurity (2S)-1-[2-[(3-Hydroxytricyclo[3.3.1.13,7]dec-1-yl)amino]acetyl]- 2-pyrrolidine carboxamide ; Vildagliptin Impurity 16 C17H27N3O3 565453-39-6
Dabigatran Etexilate Isopropyl Ester Analog C35H43N7O5 1610758-19-4
Flecainide acetate N-(piperidin-2-ylmethyl)-2,5-bis(2,2,2- trifluoroethoxy)benzamide acetate C19H24F6N2O5 54143-56-5
Metolazone EP Impurity D Metolazone USP RC E ; Didehydrometolazone C16H14ClN3O3S 4015-23-0
Brexpiprazole Impurity 4 7-(4-hydroxybutoxy)quinolin-2(1H)-one C13H15NO3 1886188-97-1
Meloxicam EP Impurity D Meloxicam USP RC D; N-[(2Z)-3-ethyl-5-methylthiazol-2(3H)- ylidene]-4-hydroxy-2-methyl-2H-1,2-benzothiazine-3- carboxamide 1,1-dioxide C16H17N3O4S2 1331636-17-9
Esomeprazole EP Impurity A Omeprazole EP Impurity A ; 5-Methoxy-1H-benzimidazole-2- thiol C8H8N2OS 37052-78-1
Omeprazole EP Impurity A Esomeprazole EP Impurity A ; 5-Methoxy-1H-benzimidazole-2- thiol C8H8N2OS 37052-78-1
Sitagliptin EP Impurity A (S)-SitagliptinIsomer ; (S)-4-Oxo-4-[3-(trifluoromethyl)-5,6-dihydro[1,2,4]triazolo[4,3- a]pyrazin-7(8H)-yl]-1-(2,4,5-trifluorophenyl)butan-2-amine ; C16H15F6N5O 823817-55-6
N-Acetyl-O-methyl-D-serine N-Acetyl-O-methyl-D-serine; (R)-2-(Acetylamino)-3- methoxypropionic Acid C6H11NO4 196601-67-9
Tropicamide (2RS)-N-Ethyl-3-hydroxy-2-phenyl-N-(pyridin-4- ylmethyl)propanamide C17H20N2O2 1508-75-4
Fosfomycin Tromethamine 2-amino-2-(hydroxymethyl)propane-1,3-diol ((2R,3S)-3- methyloxiran-2-yl) phosphonate C7H18NO7P 78964-85-9
Bumetanide 3-(butylamino)-4-phenoxy-5-sulfamoylbenzoic acid C17H20N2O5S 28395-03-1
Ethyl 3-methylisoxazole-4-carboxylate C7H9NO3 20328-15-8
Paracetamol EP Impurity D N-phenylacetamide C8H9NO 103-84-4
Nateglinide (2R)-2-({[trans-4-(1-methylethyl)cyclohexyl]carbonyl}amino)-3- phenylpropanoic acid C19H27NO3 105816-04-4
4-Chlorophenol C6H5ClO 106-48-9
Chlortalidone EP impurity A Chlorthalidone Chlorosulfobenzoyl Benzoic Acid Impurity C14H9ClO6S 345930-32-7
Amlodipine USP RC A (3-Ethyl 5-methyl [2-(2-aminoethoxymethyl)-4-(2-chlorophenyl)- 6-methyl-3,5-pyridinedicarboxylate fumarate) C24H27ClN2O9 2138811-33-1
Rosuvastatin Calcium (3R,5S,6E)-7-{4-(4-Fluorophenyl)-6-isopropyl-2- [methyl(methylsulfonyl)amino]pyrimidin-5-yl}-3,5- dihydroxyhept-6-enoic acid calcium salt C22H30CaFN3O6S 147098-20-2
Brexpiprazole Di-N-Oxide 1-(Benzo[b]thiophen-4-yl)-4-(4-((2-oxo-l,2-dihydroquinolin-7- yl)oxy)butyl) piperazine 1,4-dioxide C25H27N3O4S 2247155-42-4
Hydroxynovaldiamine 2-[(4-aminopentyl)(ethyl)amino]ethan-1-ol C9H22N2O 69559-11-1
Mesalazine EP Impurity E 4-amino-2-hydroxybenzoic acid (4-aminosalicylic acid).; Mesalamine EP Impurity E C7H7NO3 65-49-6
Chlorobutoxy Dihydroquinolinone 7-(4-Chlorobutoxy)-3,4-dihydro-2(1H)-quinolinone; 7-(4- Chlorobutoxy)-3,4-dihydro-C2(1H)-quinoline C13H16ClNO2 120004-79-7
Allopurinol EP Impurity A Allopurinol USP RC A ; 5-amino-1H-pyrazole-4-carboxamide C8H14N8O6S 27511-79-1
Clonidine EP Impurity C 2,6-Dichloroaniline C6H5Cl2N 608-31-1
Ondansetron EP Impurity D Related compound D, 9-methyl-3-methylene-1,2,3,9-tetrahydro 4H-carbazol-4-one C14H13NO 99614-64-9
Brexpiprazole Impurity 7 7-(4-(4-(benzo[b]thiophen-4-yl)piperazin-1-yl)butoxy)-1-(4- (4-(benzo[b]thiophen-4-yl)piperazin-1-yl)butyl)quinolin-2(1H)- one C41H47N5O2S2 2137823-20-0
Teriflunomide Impurity 4 1-ethoxy-4-(trifluoromethyl)benzene C9H9F3O 2366-92-9
Esketamine EP Impurity C (2-chlorophenyl)(1-hydroxycyclopentyl)methanone C12H13ClO2 90717-17-2
Diazepam EP Impurity B 2-Chloro-N-(4-chloro-2-benzoylphenyl)-N-methylacetamide C16H13Cl2NO2 6021-21-2
Dabigatran Etexilate Dimer C59H64N14O7 2101852-25-7
1-Phenyl-3-oxabicyclo[3.1.0]hexan-2-one C11H10O2 63106-93-4
Buspirone EP Impurity K USP RC K ; 8-Azaspiro[4.5]decane-7,9-dione C9H13NO2 1075-89-4
Lisinopril EP Impurity D R,S,S-Diketopiperazine C21H29N3O4 219677-82-4
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 C22H21ClN6O 114798-36-6
Eprosartan (E)-3-[2-Butyl-1-[(4-carboxyphenyl)methyl]-imidazol-5-yl]-2-(2- thienyl methyl)-2-propenoic acid C23H24N2O4S 133040-01-4
Venlafaxine HCl 1-[2-(Dimethylamino)-1-(4-methoxyphenyl)ethyl]cyclohexanol hydrochloride C17H28ClNO2 99300-78-4
Azilsartan Impurity C 2-ethoxy-1-((2'-(N'-hydroxycarbamimidoyl) -[1,1'-biphenyl]-4-yl)methyl)-1H-benzo[d]imidazole-7-carboxylic acid 397836-49-5
Zolpidem Tartrate EP Impurity B 2-[2-(3-bromo-4-methylphenyl)-6-methylimidazo[1,2-a]pyridin- 3-yl]-N,N-dimethylacetamide
Apixaban Impurity 5 3-morpholino-1-(4-(2-oxopiperidin-1-yl)phenyl)pyridin-2(1H)- one
Glipizide N-[2- [4[[[(Cyclohexylamino)carbonyl]amino]sulfonyl]phenyl]ethyl]-5- methylpyrazinecarboxamide 9094-61-9
Brimonidine EP Impurity B 5-bromoquinoxalin-6-amine
Doxazosin Mesylate 1-(4-Amino-6,7-dimethoxyquinazolin-2-yl)-4-[(2RS)-2,3-dihydro -1,4-benzodioxin-2-ylcarbonyl]piperazine methanesulphonate 77883-43-3 /74191-85-8
Lacosamide EP Impurity H USP Dimer (R, R isomer)
Anhydro tetracycline impurity (4S,4aS,12aS)-4-(Dimethylamino)-1,4,4a,5,12,12a-Hexahydro- 3,10,11,12a-Tetrahydroxy-6-Methyl-1,12-Dioxotetracene-2- Carboxamide
Closantel EP Impurity C (2RS)-[2-Chloro-4-[(2-hydroxy-3,5-diiodobenzoyl)amino]-5- methylphenyl](4-chlorophenyl)acetic acid
Ethacrynic Acid Impurity 4 [2,3-dichloro-4-(2-methylacryloyl)phenoxy]acetic acid
1,3-bis(2-methoxyphenoxy)propan-2-ol 1,3-bis(2-methoxyphenoxy)propan-2-ol
2-Butyl-3-(2-Methoxy benzoyl) benzofuran (2-butyl-1-benzofuran-3-yl)(2-methoxyphenylmethanone
Tenteligliptin impurity 4 (2R)-4-Oxo-2-(3-thiazolidinylcarbonyl)-1-pyrrolidinecarboxylic Acid 1,1-Dimethylethyl Ester
Ciprofloxacin EP Impurity C Ciprofloxacin Ethylenediamine USP 103222-12-4 /528851-31-2
Sitagliptin Impurity 6 (R)-N-(4-oxo-4-(3-(trifluoromethyl)-5,6-dihydro-[1,2,4]triazolo [4,3-a]pyrazin-7(8H)-yl)-1-(2,4,5-trifluorophenyl)butan-2- yl)formamide
Brimonidine EP Impurity F 5-bromo-N-(1H-imidazol-2-yl)quinoxalin-6-amine
Tramadol EP Impurity A Tramadol Related Compound A 152538-36- 8/36282-47-0
Vildagliptin Carboxylic Acid Impurity (2S)-1-[2-[(3-Hydroxytricyclo[3.3.1.13,7]dec-1-yl)amino]acetyl]- 2-pyrrolidine carboxylic acid
Ivabradine Impurity 14 3,3'-(propane-1,3-diyl)bis(7,8-dimethoxy-1,3,4,5-tetrahydro-2H- benzo[d]azepin-2-one)
Clopidogrel S-(+)-Clopidogrel Hydrogen Sulfate 113665-84-2/ 120202-66-6
Olmesartan Methyl Ether with Trityl
Tenteligliptin impurity C (2S)-tert-butyl4-hydroxy-2-(thiazolidine-3-carbonyl)pyrrolidine- 1-carboxylate
Labetalol EP Impurity C 5-(2-(benzylamino)-1-hydroxyethyl)-2-hydroxybenzamide
Tenteligliptin impurity 3 3-[(2R,4S)-1-tert-Butoxycarbonyl-4-hydroxy-2- pyrrolidinylcarbonyl]-1,3-thiazolidine
Chloro Intermedate 2-chloro-5-(1-oxoisoindolin-3-yl)benzene-1-sulfonyl chloride
Teneligliptin (2R,4R)-Isomer {(2R4R)-4-[4-(3-methyl-1-phenyl-1H-pyrazol-5-yl)piperazine-l- yl]pyrrolidine-2-yl}( 1.3-thiazolidine-3-yl) methanone hemipentahydrobromide hydrate 1404559-17-6 (Free Base)
CHLOPIDOGREL HYDROGEN SULPHATE RACEMATE ( ±)-Methyl 2-(2-Chlorophenyl)-2-(6,7-dihydro-4H-thieno [3,2-c]pyridin-5-yl)acetate Hydrogen Sulfate 135046-48-9 90055-48-4
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