Impurity Reference Standard - Products

Montelukast

CAT No: CL-MTKT-01 CAS No: 158966-92-8 Mol Wt: 586.2 Mol F: C35H36ClNO3S Inv Status: Custom Synthesis

Chemical Name: [1-[[[(1R)-1-[3-[(E)-2-(7-Chloroquinolin-2-yl)ethenyl]phenyl]-3-[2-(1-hydroxy-1-methylethyl)phenyl]propyl]sulfanyl]methyl]cyclopropyl]acetic acid ; 1-[[[(R)-m-[(E)-2-(7-chloro-2-quinolyl)vinyl]-a-[o-(1-hydroxy-1-methylethyl)phenethyl]benzyl]thio]-methyl]cyclopropane acetic acid (as per USP)

Montelukast EP Impurity A

CAT No: CL-MTKT-02 CAS No: NA Mol Wt: 608.2 Mol F: C35H35ClNNaO3S Inv Status: Custom Synthesis

Chemical Name: Sodium 1-[[[(1S)-1-[3-[(1E)-2-(7-Chloro-2-quinolinyl)ethenyl]phenyl]-3-[2-(1-hydroxy-1-methylethyl)phenyl]propyl]sulfanyl]methyl]cyclopropyl]acetate ;

Montelukast EP Impurity B

CAT No: CL-MTKT-03 CAS No: 918972-54-0 Mol Wt: 568.2 Mol F: C35H34ClNO2S Inv Status: Custom Synthesis

Chemical Name: [1-[[[(1R)-1-[3-[(E)-2-(7-Chloroquinolin-2-yl)ethenyl]phenyl]-3-[2-(1-methylethenyl)phenyl]propyl]sulfanyl]methyl]cyclopropyl]acetic acid ;[1-[[[(1R)-1-[3-[(E)-2-(7-Chloroquinolin-2-yl)ethenyl]phenyl]-3-[2-(1-methylethenyl)phenyl]propyl]sulfanyl]methyl]cyclopropyl]acetic acid (as per USP)

Montelukast EP Impurity C

CAT No: CL-MTKT-04 CAS No: 909849-96-3 Mol Wt: 602.2 Mol F: C35H36ClNO4S Inv Status: In Stock

Chemical Name: [1-[[[1-[3-[(E)-2-(7-chloroquinolin-2-yl)ethenyl]phenyl]-3-[2-(1-hydroxy-1-methylethyl)phenyl]propyl]sulfinyl]methyl]cyclopropyl]acetic acid

Montelukast EP Impurity D

CAT No: CL-MTKT-05 CAS No: 1187586-61-3 Mol Wt: 732.4 Mol F: C41H46ClNO5S2 Inv Status: Custom Synthesis

Chemical Name: 1-[[[(1R)-1-[3-[(1R)-1-[[[1-(carboxymethyl)cyclopropyl]methyl]sulfanyl]-2-(7-chloroquinolin-2-yl)ethyl]phenyl]-3-[2-(1-hydroxy-1-methylethyl)phenyl]propyl]sulfanyl]methyl]cyclopropyl]acetic acid ; 1-[[[(1R)-1-[3-[(1R)-1-[[[1-(Carboxymethyl)cyclopropyl]methyl]sulfanyl]-2-(7-chloroquinolin-2-yl)ethyl]phenyl]-3-[2-(1-hydroxy-1-methylethyl)phenyl]propyl]sulfanyl]methyl]cyclopropyl]acetic acid (as per USP

Montelukast EP Impurity E

CAT No: CL-MTKT-06 CAS No: 1187586-58-8 Mol Wt: 732.4 Mol F: C41H46ClNO5S2 Inv Status: Custom Synthesis

Chemical Name: 1-[[[(1R)-1-[3-[(1S)-1-[[[1-(carboxymethyl)cyclopropyl]methyl]sulfanyl]-2-(7-chloroquinolin-2-yl)ethyl]phenyl]-3-[2-(1-hydroxy-1-methylethyl)phenyl]propyl]sulfanyl]methyl]cyclopropyl]acetic acid (as per EP & USP)

Montelukast EP Impurity F

CAT No: CL-MTKT-07 CAS No: 937275-23-5 Mol Wt: 570.1 Mol F: C34H32ClNO3S Inv Status: Custom Synthesis

Chemical Name: [1-[[[(1R)-3-(2-acetylphenyl)-1-[3-[(E)-2-(7-chloroquinolin-2-yl)ethenyl]phenyl]propyl]sulfanyl]methyl]cyclopropyl]acetic acid (as per EP & USP)

Montelukast EP Impurity G

CAT No: CL-MTKT-08 CAS No: 774538-96-4 Mol Wt: 586.2 Mol F: C35H36ClNO3S Inv Status: Custom Synthesis

Chemical Name: [1-[[[(1R)-1-[3-[(Z)-2-(7-chloroquinolin-2-yl)ethenyl]phenyl]-3-[2-(1-hydroxy-1-methylethyl)phenyl]propyl]sulfanyl]methyl]cyclopropyl]acetic acid

Montelukast EP Impurity H

CAT No: CL-MTKT-09 CAS No: 851755-56-1 Mol Wt: 586.2 Mol F: C34H32ClNO4S Inv Status: Custom Synthesis

Chemical Name: [1-[[[(1R)-1-[3-[(E)-2-(7-chloroquinolin-2-yl)ethenyl]phenyl]-3-[2-(methoxycarbonyl)phenyl]propyl]sulfanyl]methyl]cyclopropyl]acetic acid

Montelukast EP Impurity I

CAT No: CL-MTKT-10 CAS No: 2045402-27-3 Mol Wt: 602.2 Mol F: C35H36ClNO4S Inv Status: Custom Synthesis

Chemical Name: (2RS)-[1-[[[(1R)-1-[3-[(E)-2-(7-chloroquinolin-2-yl)ethenyl]phenyl]-3-[2-(1-hydroxy-1-methylethyl)phenyl]propyl]sulfanyl]methyl]cyclopropyl](hydroxy)acetic acid

Montelukast Ether Impurity

CAT No: CL-MTKT-11 CAS No: 168214-67-3 Mol Wt: 440 Mol F: C29H26ClNO Inv Status: Custom Synthesis

Chemical Name: 7-Chloro-2-[2-[3-(1,3,4,5-tetrahydro-1,1-dimethyl-2-benzoxepin-3-yl)phenyl]ethenyl]quinoline

Montelukast Ketocarbinol Impurity

CAT No: CL-MTKT-12 CAS No: 2682015-83-2 Mol Wt: 586 Mol F: C34H32ClNO4S Inv Status: Custom Synthesis

Chemical Name: 1-[[[(1R)-1-[3-[(1E)-2-(7-Chloro-2-quinolinyl) ethenyl] phenyl]-3-[2-(1-oxo-2-hydroxyethyl) phenyl] propyl] thio] methyl] cyclopropaneacetic acid

Montelukast Ketone Impurity (USP)

CAT No: CL-MTKT-13 CAS No: 1258428-71-5 Mol Wt: 456 Mol F: C29H26ClNO2 Inv Status: Custom Synthesis

Chemical Name: (E)-1-{3-[2-(7-Chloroquinolin-2-yl)vinyl]phenyl}-3-[2-(2-hydroxypropan-2-yl)phenyl]propan-1-one

Montelukast Lactone

CAT No: CL-MTKT-14 CAS No: 1100617-38-6 Mol Wt: 425.9 Mol F: C27H20ClNO2 Inv Status: Custom Synthesis

Chemical Name: (3S)-3-[3-[(1E)-2-(7-Chloro-2-quinolinyl)ethenyl]phenyl]-4,5-dihydro-2-benzoxepin-1(3H)-one

Montelukast Mercapto Acid Impurity

CAT No: CL-MTKT-15 CAS No: 162515-68-6 Mol Wt: 146.2 Mol F: C6H10O2S Inv Status: Custom Synthesis

Chemical Name: 3-(Mercaptomethyl)cyclopropane acetic acid ; 2-[1-(Mercaptomethyl)cyclopropyl]acetic acid

Montelukast Methoxymethoxy Impurity

CAT No: CL-MTKT-16 CAS No: 184764-27-0 Mol Wt: 446.2 Mol F: C37H40ClNO5S Inv Status: Custom Synthesis

Chemical Name: 1-[[[(1R)-1-[3-[(1E)-2-(7-Chloro-2-quinolinyl)ethenyl]phenyl]-3-[2-[1-hydroxy-2-(methoxymethoxy)-1-methylethyl]phenyl]propyl]thio]methyl]cyclo propaneacetic acid

Montelukast Methyl Ether

CAT No: CL-MTKT-17 CAS No: 1351973-25-5 Mol Wt: 600.2 Mol F: C36H38ClNO3S Inv Status: Custom Synthesis

Chemical Name: 1-[[[(1R)-1-[3-[(1E)-2-(7-Chloro-2-quinolinyl)ethenyl]phenyl]-3-[2-(1-methoxy-1-methylethyl)phenyl]propyl]thio]methyl]cyclopropaneacetic acid

Montelukast Nitrile Impurity

CAT No: CL-MTKT-18 CAS No: 866923-62-8 Mol Wt: 567.2 Mol F: C35H35ClN2OS Inv Status: Custom Synthesis

Chemical Name: 1-[[[(1R)-1-[3-[(1E)-2-(7-Chloro-2-quinolinyl)ethenyl]phenyl]-3-[2-(1-hydroxy-1-methylethyl)phenyl]propyl]thio]methyl]cyclopropaneacetonitrile

Montelukast Racemate (Acid)

CAT No: CL-MTKT-19 CAS No: NA Mol Wt: 608.17 Mol F: C35H35ClNNaO3S Inv Status: Custom Synthesis

Chemical Name: [RS-(E)]-1-[[[1-[3-[2-(7-chloro-2-quinolinyl)ethenyl]phenyl]-3-[2-(1-hydroxy-1-methylethyl)phenyl]propyl]thio]methyl]cyclopropaneacetic acid sodium salt

Montelukast Sodium

CAT No: CL-MTKT-20 CAS No: 151767-02-1 Mol Wt: 608.2 Mol F: C35H35ClNNaO3S Inv Status: In Stock

Chemical Name: Sodium [1-[[[(1R)-1-[3-[(E)-2-(7-chloroquinolin-2-yl)ethenyl]phenyl]-3-[2-(1-hydroxy-1-methylethyl)phenyl]propyl]sulfanyl]methyl]cyclopropyl]acetate

Montelukast Sulfone

CAT No: CL-MTKT-21 CAS No: 1266620-74-9 Mol Wt: 618.2 Mol F: C35H36ClNO5S Inv Status: Custom Synthesis

Chemical Name: 1-[[[1-[3-[2-(7-Chloro-2-quinolinyl)ethenyl]phenyl]-3-[2-(1-hydroxy-1-methylethyl)phenyl]propyl]sulfonyl]methyl]cyclopropaneacetic Acid

Montelukast Impurity

CAT No: CL-MTKT-22 CAS No: 152922-86-6 Mol Wt: 189.2 Mol F: C7H11NO3S Inv Status: Custom Synthesis

Chemical Name: (1-(cyanomethyl)cyclopropyl)methyl methanesulfonate

Montelukast EP Impurity D / E

CAT No: CL-MTKT-23 CAS No: 1242260-05-4 Mol Wt: 732.4 Mol F: C41H46ClNO5S2 Inv Status: Custom Synthesis

Chemical Name: 2-(1-((((R)-1-(3-((R)-1-(((1-(carboxymethyl)cyclopropyl)methyl)thio)-2-(7-chloroquinolin-2-yl)ethyl)phenyl)-3-(2-(2-hydroxypropan-2-yl)phenyl)propyl)thio)methyl)cyclopropyl)acetic acid compound with 2-(1-((((R)-1-(3-((S)-1-(((1-(carboxymethyl)cyclopropyl)methyl)thio)-2-(7-chloroquinolin-2-yl)ethyl)phenyl)-3-(2-(2-hydroxypropan-2-yl)phenyl)propyl)thio)methyl)cyclopropyl)acetic acid (1:1)

Montelukast (3R)-Hydroxy Benzoate

CAT No: CL-MTKT-24 CAS No: 150026-72-5 Mol Wt: 458 Mol F: C28H24ClNO3 Inv Status: In Stock

Chemical Name: 2-[(3R)-(2-(7-Chloro-2-quinolinyl)-ethenyl-phenyl)-3-hydroxy-propyl)]-1-methoxycarbonylbenzene ; Methyl [E]-2-[(3R)-[3-[2-(7-Chloro-2-quinolinyl)ethenyl]phenyl]-3-hydroxypropyl] benzoate

Montelukast (3R)-Hydroxy Propanol

CAT No: CL-MTKT-25 CAS No: 142542-48-1 Mol Wt: 458 Mol F: C29H28ClNO2 Inv Status: Custom Synthesis

Chemical Name: (R)-1-(3-(2-(7-Chloroquinolin-2-yl)vinyl)phenyl)-3-(2-(2-hydroxypropan-2-yl)phenyl)propan-1-ol

Montelukast (3RS)-Hydroxy Propanol

CAT No: CL-MTKT-26 CAS No: 959235-68-8 Mol Wt: 458 Mol F: C29H28ClNO2 Inv Status: Custom Synthesis

Chemical Name: 2-[(3RS)-(2-(7-Chloro-2-quinolinyl)- ethenyl-phenyl)-3-hydroxy-propyl)] phenyl)-2-propanol

Montelukast (3S)-Hydroxy Benzoate

CAT No: CL-MTKT-27 CAS No: 142569-69-5 Mol Wt: 458 Mol F: C28H24ClNO3 Inv Status: Custom Synthesis

Chemical Name: 2-[(3S)-(2-(7-Chloro-2-quinolinyl)-ethenyl-phenyl)-3-hydroxy-propyl)]-1-methoxycarbonylbenzene ;Methyl [E]-2-[(3S)-[3-[2-(7-Chloro-2-quinolinyl)ethenyl]phenyl]-3-hydroxypropyl] benzoate

Montelukast (3S)-Hydroxy Methoxymethoxy Impurity

CAT No: CL-MTKT-28 CAS No: 184764-20-3 Mol Wt: 518 Mol F: C31H32ClNO4 Inv Status: Custom Synthesis

Chemical Name: 2-[3-(S)-[3-(2-(7-Chloro-2-quinolinyl)ethenyl)phenyl]-3-hydroxypropyl]phenyl-2-(1?hydroxy-2?methoxymethyl)propanol

Montelukast (3S)-Hydroxy Methylketone

CAT No: CL-MTKT-29 CAS No: 184764-13-4 Mol Wt: 442 Mol F: C28H24ClNO2 Inv Status: Custom Synthesis

Chemical Name: 1-[2-[(3S)-3-[3-[(1E)-2-(7-Chloro-2-quinolinyl)ethenyl]phenyl]-3-hydroxypropyl]phenyl]acetate

Montelukast (3S)-Hydroxy Propanol

CAT No: CL-MTKT-30 CAS No: 142569-70-8 Mol Wt: 458 Mol F: C29H28ClNO2 Inv Status: Custom Synthesis

Chemical Name: (S)-2-(2-(3-(2-(7-Chloro-2-quinolinyl)-ethenylphenyl)-3-hydroxypropyl)phenyl)-2-propanol ; (S)-1-(3-(2-(7-Chloro-2-quinolinyl)ethenyl)phenyl)-3-(2-(1-hydroxy-1-methylethyl)-phenyl)propanol ;2-[(3S)-(2-(7-Chloro-2-quinolinyl)- ethenyl-phenyl)-3-hydroxy-propyl)] phenyl)-2-propanol

Montelukast (R)-Hydroxy Metabolite

CAT No: CL-MTKT-31 CAS No: 184763-26-6 Mol Wt: 600.2 Mol F: C35H36ClNO4S Inv Status: Custom Synthesis

Chemical Name: 1-[[[(1R)-1-[3-[(1E)-2-(7-Chloro-2-quinolinyl)ethenyl]phenyl]-(R)-hydroxy-3-[2-(1-hydroxy-1-methylethyl)phenyl]propyl]thio]methyl]cyclopropaneacetic acid

Montelukast (S)-Hydroxy Metabolite

CAT No: CL-MTKT-32 CAS No: 184763-29-9 Mol Wt: 602.2 Mol F: C35H36ClNO4S Inv Status: Custom Synthesis

Chemical Name: 1-[[[(1R)-1-[3-[(1E)-2-(7-Chloro-2-quinolinyl)ethenyl]phenyl]-(S)-hydroxy-3-[2-(1-hydroxy-1-methylethyl)phenyl]propyl]thio]methyl]cyclopropaneacetic acid

Montelukast 1,2-Diol

CAT No: CL-MTKT-33 CAS No: 186352-97-6 Mol Wt: 602.2 Mol F: C35H36ClNO4S Inv Status: Custom Synthesis

Chemical Name: 1-[1-[[[(1R)-1-[3-[(1E)-2-(7-Chloro-2-quinolinyl)ethenyl]phenyl]-3-[2-(1,2-diol-2-methyl ethyl)phenyl]propyl]thio]methyl]cyclopropane acetic acid

Montelukast 3-Oxo Benzoate

CAT No: CL-MTKT-34 CAS No: 149968-11-6 Mol Wt: 455.9 Mol F: C28H22ClNO3 Inv Status: In Stock

Chemical Name: 2-[3-[3-[2-(7-Chloro-2-quinolinyl)ethenyl]phenyl]-3-oxopropyl]benzoic acid methyl ester

Montelukast Acid Methyl Ester

CAT No: CL-MTKT-35 CAS No: 855473-51-7 Mol Wt: 600.2 Mol F: C36H38ClNO3S Inv Status: In Stock

Chemical Name: 1-[[[1-[3-[(1E)-2-(7-Chloro-2-quinolinyl)ethenyl]phenyl]-3-[2-(1-hydroxy-1-methylethyl)phenyl]propyl]thio]methyl]cyclopropaneacetic acid methyl ester

Montelukast Acyl-Beta-D-Glucuronide Acetate

CAT No: CL-MTKT-36 CAS No: 188717-17-1 Mol Wt: 767.34 Mol F: C41H38D6ClNO9S Inv Status: Custom Synthesis

Chemical Name: Montelukast Acyl-?D-glucuronide-d6

Montelukast Amide

CAT No: CL-MTKT-37 CAS No: 866923-63-9 Mol Wt: 585.5 Mol F: C35H37ClN2O2S Inv Status: Custom Synthesis

Chemical Name: 1-[[[(1R)-1-[3-[(1E)-2-(7-Chloro-2-quinolinyl)ethenyl]phenyl]-3-[2-(1-hydroxy-1-methylethyl) phenyl] propyl] thio] methyl] cyclopropaneacetamide

Montelukast Dicarboxylic Acid Disodium Salt

CAT No: CL-MTKT-38 CAS No: 213380-27-9 Mol Wt: 616.2 Mol F: C35H34ClNO5S Inv Status: Custom Synthesis

Chemical Name: 2-(2-((R)-3-(((1-(carboxymethyl)cyclopropyl)methyl)thio)-3-(3-((E)-2-(7-chloroquinolin-2-yl)vinyl)phenyl)propyl)phenyl)-2-hydroxypropanoic acid

Montelukast Dicyclohexylamine

CAT No: CL-MTKT-39 CAS No: 577953-88-9 Mol Wt: 586.2 : 181.3 Mol F: C35H36ClNO3S : C12H23N Inv Status: Custom Synthesis

Chemical Name: [1-[[[(1R)-1-[3-[(E)-2-(7-chloroquinolin-2-yl)ethenyl]phenyl]-3-[2-(1-hydroxy-1-methylethyl)phenyl]propyl]sulfanyl]methyl]cyclopropyl]acetic acid N-Cyclohexylcyclohexanamine;1-[[[(R)-m-[(E)-2-(7-chloro-2-quinolyl)vinyl]-a-[o-(1-hydroxy-1-methylethyl)phenethyl]benzyl]thio]-methyl]cyclopropane acetic acid N-Cyclohexylcyclohexanamine(as per USP)

Montelukast Dihydro Impurity Sodium Salt

CAT No: CL-MTKT-40 CAS No: 142147-98-6 Mol Wt: 588.2:23.0 Mol F: C35H38ClNO3S : Na Inv Status: Custom Synthesis

Chemical Name: (R)-2-(1-(((1-(3-(2-(7-chloroquinolin-2-yl)ethyl)phenyl)-3-(2-(2-hydroxypropan-2-yl)phenyl)propyl)thio)methyl)cyclopropyl)acetic acid, sodium salt

Montelukast Disulfide Diacid Impurity

CAT No: CL-MTKT-41 CAS No: 162515-67-5 Mol Wt: 290.4 Mol F: C12H18O4S2 Inv Status: Custom Synthesis

Chemical Name: 2-(1-((2-((1-Carboxymethylcyclopropyl)methyl)disulfanyl)methyl)cyclo propyl)acetic acid

Montelukast Disulfide Dimethyl Ester

CAT No: CL-MTKT-42 CAS No: 1446481-28-2 Mol Wt: 318.5 Mol F: C14H22O4S2 Inv Status: Custom Synthesis

Chemical Name: Methyl 2-(1-((2-((1-methoxycarbonylmethylcyclopropyl)methyl)disulfanyl) methyl)cyclopropyl)acetate

Montelukast Chloroalcohol Impurity

CAT No: CL-MTKT-43 CAS No: 880769-28-8 Mol Wt: 446.4 Mol F: C29H27CI2NO Inv Status: Custom Synthesis

Chemical Name: 2-[(3S)-3-Chloro-3-[3-[(1E)-2-(7-chloro-2-quinolinyl)ethenyl]phenyl]propyl]-a,a-dimethylbenzenemethanol

Montelukast Dehydro Impurity

CAT No: CL-MTKT-44 CAS No: 168214-68-4 Mol Wt: 440 Mol F: C29H26ClNO Inv Status: Custom Synthesis

Chemical Name: 2-(2-((E)-3-(3-((E)-2-(7-chloroquinolin-2-yl)vinyl)phenyl)allyl)phenyl)propan-2-ol

Montelukast Impurity 14

CAT No: CL-MTKT-46 CAS No: 120578-03-2 Mol Wt: 293.8 Mol F: C18H12ClNO Inv Status: In Stock

Chemical Name: (E)-3-(2-(7-Chloroquinolin-2-yl)vinyl)benzaldehyde

Montelukast Hydroxy Benzoate

CAT No: CL-MTKT-48 CAS No: 1429878-86-3 Mol Wt: 457.95 Mol F: C28H24ClNO3 Inv Status: In Stock

Chemical Name: Methyl (E)-2-(3-(3-(2-(7-chloroquinolin-2-yl)vinyl)phenyl)-3-hydroxypropyl)benzoate

Montelukast Hydroxy Propanol

CAT No: CL-MTKT-49 CAS No: 1079753-36-8 Mol Wt: 458 Mol F: C29H28ClNO2 Inv Status: In Stock

Chemical Name: (E)-1-(3-(2-(7-Chloroquinolin-2-yl)vinyl)phenyl)-3-(2-(2-hydroxypropan-2-yl)phenyl)propan-1-ol

Montelukast Dihydro Impurity

CAT No: CL-MTKT-50 CAS No: 142147-67-9 Mol Wt: 588.2 Mol F: C35H38ClNO3S Inv Status: In Stock

Chemical Name: (R)-2-(1-(((1-(3-(2-(7-chloroquinolin-2-yl)ethyl)phenyl)-3-(2-(2-hydroxypropan-2-yl)phenyl)propyl)thio)methyl)cyclopropyl)acetic acid

Montelukast Sulfoxide Impurity

CAT No: CL-MTKT-51 CAS No: 1152185-58-4 Mol Wt: 602.2 Mol F: C35H36ClNO4S Inv Status: In Stock

Chemical Name: 2-(1-((((R)-1-(3-((E)-2-(7-Chloroquinolin-2-yl)vinyl)phenyl)-3-(2-(2-hydroxypropan-2-yl)phenyl)propyl)sulfinyl)methyl)cyclopropyl)acetic acid

cis-Montelukast Sulfoxide (Sodium salt)

CAT No: CL-MTKT-52 CAS No: 1428448-97-8 Mol Wt: 601.2 : 23.0 Mol F: C35H35ClNO4S : Na Inv Status: Custom Synthesis

Chemical Name: Sodium 2-(1-(((S)-((R)-1-(3-((Z)-2-(7-chloroquinolin-2-yl)vinyl)phenyl)-3-(2-(2-hydroxypropan-2-yl)phenyl)propyl)sulfinyl)methyl)cyclopropyl)acetate

Montelukast Impurity 3

CAT No: CL-MTKT-53 CAS No: 152922-71-9 Mol Wt: 111.1 Mol F: C6H9NO Inv Status: Custom Synthesis

Chemical Name: 2-(1-(Hydroxymethyl)cyclopropyl)acetonitrile

Montelukast Impurity 4

CAT No: CL-MTKT-54 CAS No: NA Mol Wt: 790.5 Mol F: C45H56ClNO5S2 Inv Status: Custom Synthesis

Chemical Name: 2-(1-((((1R)-1-(3-((1R)-2-(7-chloroquinolin-2-yl)-1-((2-((2-ethylhexyl)oxy)-2-oxoethyl)thio)ethyl)phenyl)-3-(2-(2-hydroxypropan-2-yl)phenyl)propyl)thio)methyl)cyclopropyl)acetic acid

Montelukast Ketone Impurity

CAT No: CL-MTKT-55 CAS No: 1258428-71-5 Mol Wt: 456 Mol F: C29H26ClNO2 Inv Status: Custom Synthesis

Chemical Name: (E)-1-{3-[2-(7-Chloroquinolin-2-yl)vinyl]phenyl}-3-[2-(2-hydroxypropan-2-yl)phenyl]propan-1-one

Montelukast Racemate

CAT No: CL-MTKT-56 CAS No: 220927-26-4 Mol Wt: 586.2 Mol F: C35H36ClNO3S Inv Status: Custom Synthesis

Chemical Name: 1-[[[(1RS)-1-[3-[(1E)-2-(7-Chloro-2-quinolinyl)ethenyl]phenyl]-3-[2-(1-hydroxy-1-methylethyl)phenyl]propyl]thio]methyl]cyclopropaneacetic acid

Montelukast R-Sulfoxide

CAT No: CL-MTKT-57 CAS No: 184763-47-1 Mol Wt: 602.2 Mol F: C35H36ClNO4S Inv Status: Custom Synthesis

Chemical Name: 2-(1-(((R)-((R)-1-(3-((E)-2-(7-chloroquinolin-2-yl)vinyl)phenyl)-3-(2-(2-hydroxypropan-2-yl)phenyl)propyl)sulfinyl)methyl)cyclopropyl)acetic acid

Montelukast EP Impurity A (Sodium salt)

CAT No: CL-MTKT-58 CAS No: 190078-45-6 Mol Wt: 608.2 Mol F: C35H35ClNNaO3S Inv Status: Custom Synthesis

Chemical Name: Sodium (S,E)-2-(1-(((1-(3-(2-(7-chloroquinolin-2-yl)vinyl)phenyl)-3-(2-(2-hydroxypropan-2-yl)phenyl)propyl)thio)methyl)cyclopropyl)acetate

Montelukast S-Sulfoxide

CAT No: CL-MTKT-59 CAS No: 184763-44-8 Mol Wt: 602.2 Mol F: C35H36ClNO4S Inv Status: Custom Synthesis

Chemical Name: 2-(1-(((S)-((R)-1-(3-((E)-2-(7-chloroquinolin-2-yl)vinyl)phenyl)-3-(2-(2-hydroxypropan-2-yl)phenyl)propyl)sulfinyl)methyl)cyclopropyl)acetic acid

Montelukast Sulfoxide (Mixture of Diastereomers)

CAT No: CL-MTKT-60 CAS No: 1152185-58-4 Mol Wt: 602.2 Mol F: C35H36ClNO4S Inv Status: Custom Synthesis

Chemical Name: 2-(1-((((R)-1-(3-((E)-2-(7-Chloroquinolin-2-yl)vinyl)phenyl)-3-(2-(2-hydroxypropan-2-yl)phenyl)propyl)sulfinyl)methyl)cyclopropyl)acetic acid

Montelukast Acid Impurity (Sodium salt)

CAT No: CL-MTKT-61 CAS No: NA Mol Wt: 570.1 : 2(23.0) Mol F: C33H28ClNO4S2 : 2(Na) Inv Status: Custom Synthesis

Chemical Name: Sodium (R,E)-2-(3-(((1-(carboxylatomethyl)cyclopropyl)methyl)thio)-3-(3-(2-(7-chloroquinolin-2-yl)vinyl)phenyl)propyl)benzoate

Montelukast Acyl-b-D-Glucuronide Acetate

CAT No: CL-MTKT-62 CAS No: 188717-17-1 Mol Wt: 762.3 : 60.0 Mol F: C41H44ClNO9S : C2H4O2 Inv Status: Custom Synthesis

Chemical Name: (2S,3S,4S,5R,6S)-6-(2-(1-((((R)-1-(3-((E)-2-(7-chloroquinolin-2-yl)vinyl)phenyl)-3-(2-(2-hydroxypropan-2-yl)phenyl)propyl)thio)methyl)cyclopropyl)acetoxy)-3,4,5-trihydroxytetrahydro-2H-pyran-2-carboxylic acid compound with acetic acid (1:1)

Montelukast Dicarboxylic Acid

CAT No: CL-MTKT-63 CAS No: 213380-27-9 Mol Wt: 616.2 Mol F: C35H34ClNO5S Inv Status: Custom Synthesis

Chemical Name: 2-(2-((R)-3-(((1-(carboxymethyl)cyclopropyl)methyl)thio)-3-(3-((E)-2-(7-chloroquinolin-2-yl)vinyl)phenyl)propyl)phenyl)-2-hydroxypropanoic acid

Montelukast Dihydrate

CAT No: CL-MTKT-64 CAS No: NA Mol Wt: 586.2 2(18.0) Mol F: C35H36ClNO3S 2(H2O) Inv Status: Custom Synthesis

Chemical Name: (R,E)-2-(1-(((1-(3-(2-(7-chloroquinolin-2-yl)vinyl)phenyl)-3-(2-(2-hydroxypropan-2-yl)phenyl)propyl)thio)methyl)cyclopropyl)acetic acid dihydrate

Montelukast Dimer Impurity

CAT No: CL-MTKT-65 CAS No: 120578-04-3 Mol Wt: 453.4 Mol F: C28H18Cl2N2 Inv Status: Custom Synthesis

Chemical Name: 1,3-Bis((E)-2-(7-chloroquinolin-2-yl)vinyl)benzene

Montelukast EP Impurity C (Sodium salt)

CAT No: CL-MTKT-66 CAS No: 909796-71-0 Mol Wt: 601.2 : 23.0 Mol F: C35H35ClNO4S : Na Inv Status: Custom Synthesis

Chemical Name: Sodium [1-[[[1-[3-[(E)-2-(7-chloroquinolin-2-yl)ethenyl]phenyl]-3-[2-(1-hydroxy-1-methylethyl)phenyl]propyl]sulfinyl]methyl]cyclopropyl]acetate (as per EP)

Montelukast Impurity 1

CAT No: CL-MTKT-67 CAS No: 866923-64-0 Mol Wt: 127.2 Mol F: C6H9NS Inv Status: Custom Synthesis

Chemical Name: 2-(1-(mercaptomethyl)cyclopropyl)acetonitrile

Montelukast Impurity 11

CAT No: CL-MTKT-68 CAS No: 855473-50-6 Mol Wt: 207.1 Mol F: C7H11BrO2 Inv Status: Custom Synthesis

Chemical Name: Methyl 2-(1-(bromomethyl)cyclopropyl)acetate

Montelukast Impurity 12

CAT No: CL-MTKT-69 CAS No: 3580-97-0 Mol Wt: 366.9 Mol F: C7H11Br3O2 Inv Status: Custom Synthesis

Chemical Name: 3-Bromo-2,2-bis(bromomethyl)propyl acetate

Montelukast Impurity 14

CAT No: CL-MTKT-70 CAS No: 120578-03-2 Mol Wt: 293.8 Mol F: C18H12ClNO Inv Status: Custom Synthesis

Chemical Name: (E)-3-(2-(7-Chloroquinolin-2-yl)vinyl)benzaldehyde

Montelukast Impurity 15

CAT No: CL-MTKT-71 CAS No: 152922-72-0 Mol Wt: 169.2 Mol F: C8H11NOS Inv Status: Custom Synthesis

Chemical Name: S-((1-(Cyanomethyl)cyclopropyl)methyl) ethanethioate

Montelukast Impurity 16

CAT No: CL-MTKT-72 CAS No: 149968-10-5 Mol Wt: 321.8 Mol F: C20H16ClNO Inv Status: Custom Synthesis

Chemical Name: (E)-1-(3-(2-(7-chloroquinolin-2-yl)vinyl)phenyl)prop-2-en-1-ol

Montelukast Impurity 17

CAT No: CL-MTKT-73 CAS No: NA Mol Wt: 746.4 Mol F: C42H48ClNO5S2 Inv Status: Custom Synthesis

Chemical Name: 2-(1-((((R)-1-(3-((R)-1-(((1-(Carboxymethyl)cyclopropyl)methyl)thio)-2-(7-chloroquinolin-2-yl)ethyl)phenyl)-3-(2-(2-methoxypropan-2-yl)phenyl)propyl)thio)methyl)cyclopropyl)acetic acid

Montelukast Impurity 18

CAT No: CL-MTKT-74 CAS No: 1351973-24-4 Mol Wt: 714.4 Mol F: C41H44ClNO4S2 Inv Status: Custom Synthesis

Chemical Name: 2-(1-((((R)-1-(3-((R)-1-(((1-(Carboxymethyl)cyclopropyl)methyl)thio)-2-(7-chloroquinolin-2-yl)ethyl)phenyl)-3-(2-(prop-1-en-2-yl)phenyl)propyl)thio)methyl)cyclopropyl)acetic acid

Montelukast Impurity 19

CAT No: CL-MTKT-75 CAS No: 181139-72-0 Mol Wt: 458 Mol F: C28H24ClNO3 Inv Status: Custom Synthesis

Chemical Name: Methyl (S,E)-2-(3-(3-(2-(7-chloroquinolin-2-yl)vinyl)phenyl)-3-hydroxypropyl)benzoate

Montelukast Impurity 20

CAT No: CL-MTKT-76 CAS No: 287930-77-2 Mol Wt: 458 Mol F: C29H28ClNO2 Inv Status: Custom Synthesis

Chemical Name: (S,E)-1-(3-(2-(7-Chloroquinolin-2-yl)vinyl)phenyl)-3-(2-(2-hydroxypropan-2-yl)phenyl)propan-1-ol

Montelukast Impurity 21

CAT No: CL-MTKT-77 CAS No: NA Mol Wt: 602.2 Mol F: C35H36ClNO4S Inv Status: Custom Synthesis

Chemical Name: 2-(1-(((R)-((R)-2-(7-Chloroquinolin-2-yl)-1-(3-((E)-3-(2-(2-hydroxypropan-2-yl)phenyl)prop-1-en-1-yl)phenyl)ethyl)sulfinyl)methyl)cyclopropyl)acetic acid

Montelukast Impurity 8

CAT No: CL-MTKT-78 CAS No: 136476-38-5 Mol Wt: 258.3 Mol F: C7H14O6S2 Inv Status: Custom Synthesis

Chemical Name: Cyclopropane-1,1-diylbis(methylene) dimethanesulfonate

Montelukast Impurity 9

CAT No: CL-MTKT-79 CAS No: 807638-71-7 Mol Wt: 536.1 Mol F: C30H30ClNO4S Inv Status: Custom Synthesis

Chemical Name: (S,E)-1-(3-(2-(7-chloroquinolin-2-yl)vinyl)phenyl)-3-(2-(2-hydroxypropan-2-yl)phenyl)propyl methanesulfonate

Montelukast KSM-II Lactone Impurity

CAT No: CL-MTKT-80 CAS No: 162515-66-4 Mol Wt: 128.2 Mol F: C6H8OS Inv Status: Custom Synthesis

Chemical Name: 5-thiaspiro[2.4]heptan-6-one

Montelukast Potassium

CAT No: CL-MTKT-81 CAS No: 577953-87-8 Mol Wt: 585.2 39.1 Mol F: C35H35ClNO3S K Inv Status: Custom Synthesis

Chemical Name: Potassium [1-[[[(1R)-1-[3-[(E)-2-(7-chloroquinolin-2-yl)ethenyl]phenyl]-3-[2-(1-hydroxy-1-methylethyl)phenyl]propyl]sulfanyl]methyl]cyclopropyl]acetate

Montelukast Racemate Dicyclohexylamine

CAT No: CL-MTKT-82 CAS No: NA Mol Wt: 586.2 : 181.3 Mol F: C35H36ClNO3S : C12H23N Inv Status: Custom Synthesis

Chemical Name: Dicyclohexylammonium (RS,E)-2-(1-{[(1-{3-[2-(7-chloroquinolin-2-yl)vinyl]phenyl}-3-[2-(2-hydroxypropan-2- yl)phenyl]propyl)thio]methyl}cyclopropyl)acetate

Montelukast EP Impurity B (Sodium salt)

CAT No: CL-MTKT-83 CAS No: 1146137-52-1 Mol Wt: 567.2 : 23.0 Mol F: C35H33ClNO2S : Na Inv Status: Custom Synthesis

Chemical Name: [1-[[[(1R)-1-[3-[(E)-2-(7-chloroquinolin-2-yl)ethenyl]phenyl]-3-[2-(1-methylethenyl)phenyl]propyl]sulfanyl]methyl]cyclopropyl]acetic acid Sodium salt

Montelukast EP Impurity G (Sodium salt)

CAT No: CL-MTKT-84 CAS No: 1428448-96-7 Mol Wt: 585.2 : 23.0 Mol F: C35H35ClNO3S : Na Inv Status: Custom Synthesis

Chemical Name: [1-[[[(1R)-1-[3-[(Z)-2-(7-chloroquinolin-2-yl)ethenyl]phenyl]-3-[2-(1-hydroxy-1-methylethyl)phenyl]propyl]sulfanyl]methyl]cyclopropyl]acetic acid Sodium salt

Montelukast Thioglucolate Analog

CAT No: CL-MTKT-85 CAS No: NA Mol Wt: 790.5 Mol F: C45H56ClNO5S2 Inv Status: Custom Synthesis

Chemical Name: 2-(1-((((1R)-1-(3-((1S)-2-(7-chloroquinolin-2-yl)-1-((2-((2-ethylhexyl)oxy)-2-oxoethyl)thio)ethyl)phenyl)-3-(2-(2-hydroxypropan-2-yl)phenyl)propyl)thio)methyl)cyclopropyl)acetic acid

Montelukast Impurity 10

CAT No: CL-MTKT-86 CAS No: NA Mol Wt: 790.5 Mol F: C45H56ClNO5S2 Inv Status: Custom Synthesis

Chemical Name: 2-(1-((((1R)-1-(3-((1R)-2-(7-chloroquinolin-2-yl)-1-((2-((2-ethylhexyl)oxy)-2-oxoethyl)thio)ethyl)phenyl)-3-(2-(2-hydroxypropan-2-yl)phenyl)propyl)thio)methyl)cyclopropyl)acetic acid compound with 2-(1-((((1R)-1-(3-((1S)-2-(7-chloroquinolin-2-yl)-1-((2-((2-ethylhexyl)oxy)-2-oxoethyl)thio)ethyl)phenyl)-3-(2-(2-hydroxypropan-2-yl)phenyl)propyl)thio)methyl)cyclopropyl)acetic acid (1:1)

Montelukast-D6 Sodium Salt

CAT No: CL-MTKT-87 CAS No: 2673270-26-1 Mol Wt: 591.2 23.0 Mol F: C35H29D6ClNO3S Inv Status: Custom Synthesis

Chemical Name: 1-[1-[[[(1R)-1-[3-[(1E)-2-(7-Chloro-2-quinolinyl)ethenyl]phenyl]-3-[2-(1-hydroxy-1-methylethyl-d6)phenyl]propyl]thio]methyl]cyclopropaneacetic Acid Sodium Salt

Type:Impurity Reference Standard

API NAME:Montelukast

Total Products: 85

Inv. Status:

Products

Popular Links

Subscribe for news letter:

CAT No:
CAS No:
Mol Wt:
Mol Formula:
Chemical Name:

CAT No:
CAS No:
Mol Wt:
Mol Formula:
Chemical Name:

CAT No:
CAS No:
Mol Wt:
Mol Formula:
Chemical Name:

CAT No:
CAS No:
Mol Wt:
Mol Formula:
Chemical Name: