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Stable Isotopes and Metabolites

Montelukast-D6 Sodium Salt

Picture of Montelukast-D6 Sodium Salt
CAT No: SZ-M031D01
CAS No: NA
Mol.F. : C35H29D6ClNO3S : Na
Mol.Wt. : 591.2 : 23.0
Inv. Status: Custom Synthesis
Rel. CAS No : 151767-02-1 (unlabelled free acid)
SZ-M031D01
CAS No:NA
Mol.F.: C35H29D6ClNO3S : Na
Mol.Wt.: 591.2 : 23.0
Inv. Status: Custom Synthesis
Rel. CAS No : 151767-02-1 (unlabelled free acid)

Pharmaceutical Reference Standards

Montelukast

Picture of Montelukast
CAT No: SZ-M031000
CAS No: 158966-92-8
Mol.F. : C35H36ClNO3S
Mol.Wt. : 586.2
Inv. Status: Under Synthesis
Rel. CAS No : 151767-02-1 (Na salt) ; 577953-87-8 (K salt) ; 577953-88-9 (Dicyclohexylamine salt)
SZ-M031000
CAS No:158966-92-8
Mol.F.: C35H36ClNO3S
Mol.Wt.: 586.2
Inv. Status: Under Synthesis
Rel. CAS No : 151767-02-1 (Na salt) ; 577953-87-8 (K salt) ; 577953-88-9 (Dicyclohexylamine salt)

Montelukast Sodium EP Impurity A

Picture of Montelukast Sodium EP Impurity A
CAT No: SZ-M031021
CAS No: 190078-45-6
Mol.F. : C35H35ClNNaO3S
Mol.Wt. : 608.2
Inv. Status: Limited Stock
Rel. CAS No : 220927-27-5 (free base)
SZ-M031021
CAS No:190078-45-6
Mol.F.: C35H35ClNNaO3S
Mol.Wt.: 608.2
Inv. Status: Limited Stock
Rel. CAS No : 220927-27-5 (free base)

Montelukast EP Impurity B

Picture of Montelukast EP Impurity B
CAT No: SZ-M031022
CAS No: 918972-54-0
Mol.F. : C35H34ClNO2S
Mol.Wt. : 568.2
Inv. Status: In Stock
Rel. CAS No : 1146137-52-1 (Na salt)
SZ-M031022
CAS No:918972-54-0
Mol.F.: C35H34ClNO2S
Mol.Wt.: 568.2
Inv. Status: In Stock
Rel. CAS No : 1146137-52-1 (Na salt)

Montelukast EP Impurity C (R isomer)

Picture of Montelukast EP Impurity C (R isomer)
CAT No: SZ-M031023
CAS No: NA
Mol.F. : C35H36ClNO4S
Mol.Wt. : 602.2
Inv. Status: In Stock
SZ-M031023
CAS No:NA
Mol.F.: C35H36ClNO4S
Mol.Wt.: 602.2
Inv. Status: In Stock

Montelukast EP Impurity D

Picture of Montelukast EP Impurity D
CAT No: SZ-M031024
CAS No: 1187586-61-3
Mol.F. : C41H46ClNO5S2
Mol.Wt. : 732.4
Inv. Status: In Stock
SZ-M031024
CAS No:1187586-61-3
Mol.F.: C41H46ClNO5S2
Mol.Wt.: 732.4
Inv. Status: In Stock

Montelukast EP Impurity E

Picture of Montelukast EP Impurity E
CAT No: SZ-M031025
CAS No: 1187586-58-8
Mol.F. : C41H46ClNO5S2
Mol.Wt. : 732.4
Inv. Status: In Stock
SZ-M031025
CAS No:1187586-58-8
Mol.F.: C41H46ClNO5S2
Mol.Wt.: 732.4
Inv. Status: In Stock

Montelukast EP Impurity F

Picture of Montelukast EP Impurity F
CAT No: SZ-M031026
CAS No: 937275-23-5
Mol.F. : C34H32ClNO3S
Mol.Wt. : 570.1
Inv. Status: In Stock
SZ-M031026
CAS No:937275-23-5
Mol.F.: C34H32ClNO3S
Mol.Wt.: 570.1
Inv. Status: In Stock

Montelukast EP Impurity G

Picture of Montelukast EP Impurity G
CAT No: SZ-M031027
CAS No: 774538-96-4
Mol.F. : C35H36ClNO3S
Mol.Wt. : 586.2
Inv. Status: In Stock
SZ-M031027
CAS No:774538-96-4
Mol.F.: C35H36ClNO3S
Mol.Wt.: 586.2
Inv. Status: In Stock

Montelukast EP Impurity H

Picture of Montelukast EP Impurity H
CAT No: SZ-M031028
CAS No: 851755-56-1
Mol.F. : C34H32ClNO4S
Mol.Wt. : 586.1
Inv. Status: Limited Stock
Rel. CAS No : 2244776-97-2 (Na salt) ; 906107-37-7 (HCl salt)
SZ-M031028
CAS No:851755-56-1
Mol.F.: C34H32ClNO4S
Mol.Wt.: 586.1
Inv. Status: Limited Stock
Rel. CAS No : 2244776-97-2 (Na salt) ; 906107-37-7 (HCl salt)

Montelukast EP Impurity I

Picture of Montelukast EP Impurity I
CAT No: SZ-M031029
CAS No: 2045402-27-3
Mol.F. : C35H36ClNO4S
Mol.Wt. : 602.2
Inv. Status: Out of Stock, Under Synthesis
SZ-M031029
CAS No:2045402-27-3
Mol.F.: C35H36ClNO4S
Mol.Wt.: 602.2
Inv. Status: Out of Stock, Under Synthesis

Montelukast Ether Impurity

Picture of Montelukast Ether Impurity
CAT No: SZ-M031030
CAS No: 168214-67-3
Mol.F. : C29H26ClNO
Mol.Wt. : 440
Inv. Status: Custom Synthesis
SZ-M031030
CAS No:168214-67-3
Mol.F.: C29H26ClNO
Mol.Wt.: 440
Inv. Status: Custom Synthesis

Montelukast Ketocarbinol Impurity

Picture of Montelukast Ketocarbinol Impurity
CAT No: SZ-M031031
CAS No: NA
Mol.F. : C34H32ClNO4S
Mol.Wt. : 586.1
Inv. Status: Custom Synthesis
SZ-M031031
CAS No:NA
Mol.F.: C34H32ClNO4S
Mol.Wt.: 586.1
Inv. Status: Custom Synthesis

Montelukast Ketone Impurity

Picture of Montelukast Ketone Impurity
CAT No: SZ-M031032
CAS No: 1258428-71-5
Mol.F. : C29H26ClNO2
Mol.Wt. : 456
Inv. Status: In Stock
SZ-M031032
CAS No:1258428-71-5
Mol.F.: C29H26ClNO2
Mol.Wt.: 456
Inv. Status: In Stock

Montelukast Lactone

Picture of Montelukast Lactone
CAT No: SZ-M031033
CAS No: 1100617-38-6
Mol.F. : C27H20ClNO2
Mol.Wt. : 425.9
Inv. Status: Custom Synthesis
SZ-M031033
CAS No:1100617-38-6
Mol.F.: C27H20ClNO2
Mol.Wt.: 425.9
Inv. Status: Custom Synthesis

Montelukast Mercapto Acid Impurity

Picture of Montelukast Mercapto Acid Impurity
CAT No: SZ-M031034
CAS No: 162515-68-6
Mol.F. : C6H10O2S
Mol.Wt. : 146.2
Inv. Status: Custom Synthesis
Rel. CAS No : 952585-15-8 (Na salt) ; 952585-16-9 (K salt)
SZ-M031034
CAS No:162515-68-6
Mol.F.: C6H10O2S
Mol.Wt.: 146.2
Inv. Status: Custom Synthesis
Rel. CAS No : 952585-15-8 (Na salt) ; 952585-16-9 (K salt)

Montelukast Methoxymethoxy Impurity

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CAT No: SZ-M031035
CAS No: 184764-27-0
Mol.F. : C37H40ClNO5S
Mol.Wt. : 646.2
Inv. Status: Custom Synthesis
SZ-M031035
CAS No:184764-27-0
Mol.F.: C37H40ClNO5S
Mol.Wt.: 646.2
Inv. Status: Custom Synthesis

Montelukast Methyl Ether

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CAT No: SZ-M031036
CAS No: 1351973-25-5
Mol.F. : C36H38ClNO3S
Mol.Wt. : 600.2
Inv. Status: In Stock
SZ-M031036
CAS No:1351973-25-5
Mol.F.: C36H38ClNO3S
Mol.Wt.: 600.2
Inv. Status: In Stock

Montelukast Nitrile Impurity

Picture of Montelukast Nitrile Impurity
CAT No: SZ-M031037
CAS No: 866923-62-8
Mol.F. : C35H35ClN2OS
Mol.Wt. : 567.2
Inv. Status: In Stock
SZ-M031037
CAS No:866923-62-8
Mol.F.: C35H35ClN2OS
Mol.Wt.: 567.2
Inv. Status: In Stock

Montelukast Racemate (Acid)

Picture of Montelukast Racemate (Acid)
CAT No: SZ-M031038
CAS No: NA
Mol.F. : C35H36ClNO3S
Mol.Wt. : 586.2
Inv. Status: Custom Synthesis
SZ-M031038
CAS No:NA
Mol.F.: C35H36ClNO3S
Mol.Wt.: 586.2
Inv. Status: Custom Synthesis

Montelukast Sodium

Picture of Montelukast Sodium
CAT No: SZ-M031039
CAS No: 151767-02-1
Mol.F. : C35H35ClNNaO3S
Mol.Wt. : 608.2
Inv. Status: In Stock
Rel. CAS No : 158966-92-8 ; 577953-87-8 (K salt); 577953-88-9 (Dicyclohexylamine salt)
SZ-M031039
CAS No:151767-02-1
Mol.F.: C35H35ClNNaO3S
Mol.Wt.: 608.2
Inv. Status: In Stock
Rel. CAS No : 158966-92-8 ; 577953-87-8 (K salt); 577953-88-9 (Dicyclohexylamine salt)

Montelukast Sulfone

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CAT No: SZ-M031040
CAS No: 1266620-74-9
Mol.F. : C35H36ClNO5S
Mol.Wt. : 618.2
Inv. Status: Custom Synthesis
SZ-M031040
CAS No:1266620-74-9
Mol.F.: C35H36ClNO5S
Mol.Wt.: 618.2
Inv. Status: Custom Synthesis

Montelukast Impurity

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CAT No: SZ-M031041
CAS No: 152922-86-6
Mol.F. : C7H11NO3S
Mol.Wt. : 189.2
Inv. Status: In Stock
SZ-M031041
CAS No:152922-86-6
Mol.F.: C7H11NO3S
Mol.Wt.: 189.2
Inv. Status: In Stock

Montelukast EP Impurity D / E

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CAT No: SZ-M031042
CAS No: NA
Mol.F. : C41H46ClNO5S2
Mol.Wt. : 732.4
Inv. Status: In Stock
SZ-M031042
CAS No:NA
Mol.F.: C41H46ClNO5S2
Mol.Wt.: 732.4
Inv. Status: In Stock

Montelukast (3R)-Hydroxy Benzoate

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CAT No: SZ-M031043
CAS No: 150026-72-5
Mol.F. : C28H24ClNO3
Mol.Wt. : 458
Inv. Status: Custom Synthesis
SZ-M031043
CAS No:150026-72-5
Mol.F.: C28H24ClNO3
Mol.Wt.: 458
Inv. Status: Custom Synthesis

Montelukast (3R)-Hydroxy Propanol

Picture of Montelukast (3R)-Hydroxy Propanol
CAT No: SZ-M031044
CAS No: 150026-75-8
Mol.F. : C29H28ClNO2
Mol.Wt. : 458
Inv. Status: Custom Synthesis
SZ-M031044
CAS No:150026-75-8
Mol.F.: C29H28ClNO2
Mol.Wt.: 458
Inv. Status: Custom Synthesis

Montelukast (3RS)-Hydroxy Propanol

Picture of Montelukast (3RS)-Hydroxy Propanol
CAT No: SZ-M031045
CAS No: 959235-68-8
Mol.F. : C29H28ClNO2
Mol.Wt. : 458
Inv. Status: Custom Synthesis
SZ-M031045
CAS No:959235-68-8
Mol.F.: C29H28ClNO2
Mol.Wt.: 458
Inv. Status: Custom Synthesis

Montelukast (3S)-Hydroxy Benzoate

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CAT No: SZ-M031046
CAS No: 142569-69-5
Mol.F. : C28H24ClNO3
Mol.Wt. : 458
Inv. Status: Custom Synthesis
SZ-M031046
CAS No:142569-69-5
Mol.F.: C28H24ClNO3
Mol.Wt.: 458
Inv. Status: Custom Synthesis

Montelukast (3S)-Hydroxy Methylketone

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CAT No: SZ-M031048
CAS No: 184764-13-4
Mol.F. : C28H24ClNO2
Mol.Wt. : 442
Inv. Status: In Stock
SZ-M031048
CAS No:184764-13-4
Mol.F.: C28H24ClNO2
Mol.Wt.: 442
Inv. Status: In Stock

Montelukast (3S)-Hydroxy Propanol

Picture of Montelukast (3S)-Hydroxy Propanol
CAT No: SZ-M031049
CAS No: 287930-77-2
Mol.F. : C29H28ClNO2
Mol.Wt. : 458
Inv. Status: In Stock
SZ-M031049
CAS No:287930-77-2
Mol.F.: C29H28ClNO2
Mol.Wt.: 458
Inv. Status: In Stock

Montelukast (R)-Hydroxy Metabolite

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CAT No: SZ-M031050
CAS No: 184763-26-6
Mol.F. : C35H36ClNO4S
Mol.Wt. : 602.2
Inv. Status: Custom Synthesis
SZ-M031050
CAS No:184763-26-6
Mol.F.: C35H36ClNO4S
Mol.Wt.: 602.2
Inv. Status: Custom Synthesis

Montelukast (S)-Hydroxy Metabolite

Picture of Montelukast (S)-Hydroxy Metabolite
CAT No: SZ-M031051
CAS No: 184763-29-9
Mol.F. : C35H36ClNO4S
Mol.Wt. : 602.2
Inv. Status: Custom Synthesis
SZ-M031051
CAS No:184763-29-9
Mol.F.: C35H36ClNO4S
Mol.Wt.: 602.2
Inv. Status: Custom Synthesis

Montelukast 1,2-Diol

Picture of Montelukast 1,2-Diol
CAT No: SZ-M031052
CAS No: 186352-97-6
Mol.F. : C35H36ClNO4S
Mol.Wt. : 602.2
Inv. Status: Custom Synthesis
SZ-M031052
CAS No:186352-97-6
Mol.F.: C35H36ClNO4S
Mol.Wt.: 602.2
Inv. Status: Custom Synthesis

Montelukast 3-Oxo Benzoate

Picture of Montelukast 3-Oxo Benzoate
CAT No: SZ-M031053
CAS No: 149968-11-6
Mol.F. : C28H22ClNO3
Mol.Wt. : 455.9
Inv. Status: Custom Synthesis
SZ-M031053
CAS No:149968-11-6
Mol.F.: C28H22ClNO3 
Mol.Wt.: 455.9
Inv. Status: Custom Synthesis

Montelukast Acid Methyl Ester

Picture of Montelukast Acid Methyl Ester
CAT No: SZ-M031054
CAS No: 855473-51-7
Mol.F. : C36H38ClNO3S
Mol.Wt. : 600.2
Inv. Status: In Stock
SZ-M031054
CAS No:855473-51-7
Mol.F.: C36H38ClNO3S
Mol.Wt.: 600.2
Inv. Status: In Stock

Montelukast Acyl-β-D-Glucuronide Acetate

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CAT No: SZ-M031055
CAS No: 188717-17-1
Mol.F. : C43H48ClNO11S
Mol.Wt. : 822.4
Inv. Status: Custom Synthesis
SZ-M031055
CAS No:188717-17-1
Mol.F.: C43H48ClNO11S
Mol.Wt.: 822.4
Inv. Status: Custom Synthesis

Montelukast Amide

Picture of Montelukast Amide
CAT No: SZ-M031056
CAS No: 866923-63-9
Mol.F. : C35H37ClN2O2S
Mol.Wt. : 585.2
Inv. Status: In Stock
SZ-M031056
CAS No:866923-63-9
Mol.F.: C35H37ClN2O2S
Mol.Wt.: 585.2
Inv. Status: In Stock

Montelukast Dicarboxylic Acid Disodium Salt

Picture of Montelukast Dicarboxylic Acid Disodium Salt
CAT No: SZ-M031057
CAS No: 213380-27-9
Mol.F. : C35H32ClNNa2O5S
Mol.Wt. : 660.1
Inv. Status: Custom Synthesis
SZ-M031057
CAS No:213380-27-9
Mol.F.: C35H32ClNNa2O5S
Mol.Wt.: 660.1
Inv. Status: Custom Synthesis

Montelukast Dicyclohexylamine

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CAT No: SZ-M031058
CAS No: 577953-88-9
Mol.F. : C35H36ClNO3S : C12H23N
Mol.Wt. : 586.2 : 181.3
Inv. Status: Under QC Approval
Rel. CAS No : 151767-02-1 (Na salt) ; 577953-87-8 (K salt) ; 158966-92-8 (free base)
SZ-M031058
CAS No:577953-88-9
Mol.F.: C35H36ClNO3S : C12H23N
Mol.Wt.: 586.2 : 181.3
Inv. Status: Under QC Approval
Rel. CAS No : 151767-02-1 (Na salt) ; 577953-87-8 (K salt) ; 158966-92-8 (free base)

Montelukast Dihydro Impurity

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CAT No: SZ-M031059
CAS No: 142147-98-6
Mol.F. : C35H38ClNO3S : Na
Mol.Wt. : 588.2 : 23.0
Inv. Status: In Stock
Rel. CAS No : 142147-67-9 (Free base)
SZ-M031059
CAS No:142147-98-6
Mol.F.: C35H38ClNO3S : Na
Mol.Wt.: 588.2 : 23.0
Inv. Status: In Stock
Rel. CAS No : 142147-67-9 (Free base)

Montelukast Disulfide Diacid Impurity

Picture of Montelukast Disulfide Diacid Impurity
CAT No: SZ-M031060
CAS No: 162515-67-5
Mol.F. : C12H18O4S2
Mol.Wt. : 290.4
Inv. Status: In Stock
SZ-M031060
CAS No:162515-67-5
Mol.F.: C12H18O4S2
Mol.Wt.: 290.4
Inv. Status: In Stock

Montelukast Disulfide Dimethyl Ester

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CAT No: SZ-M031061
CAS No: 1446481-28-2
Mol.F. : C14H22O4S2
Mol.Wt. : 318.5
Inv. Status: In Stock
SZ-M031061
CAS No:1446481-28-2
Mol.F.: C14H22O4S2
Mol.Wt.: 318.5
Inv. Status: In Stock

Montelukast Chloroalcohol impurity

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CAT No: SZ-M031062
CAS No: 880769-28-8
Mol.F. : C29H27CI2NO
Mol.Wt. : 476.4
Inv. Status: In Stock
SZ-M031062
CAS No:880769-28-8
Mol.F.: C29H27CI2NO
Mol.Wt.: 476.4
Inv. Status: In Stock

Montelukast Dehydro Impurity

Picture of Montelukast Dehydro Impurity
CAT No: SZ-M031063
CAS No: 168214-68-4
Mol.F. : C29H26ClNO
Mol.Wt. : 440
Inv. Status: Custom Synthesis
SZ-M031063
CAS No:168214-68-4
Mol.F.: C29H26ClNO
Mol.Wt.: 440
Inv. Status: Custom Synthesis

Montelukast Impurity 1

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CAT No: SZ-M031064
CAS No: 866923-64-0
Mol.F. : C6H9NS
Mol.Wt. : 127.2
Inv. Status: Custom Synthesis
Rel. CAS No : 1003002-67-2 (Na salt)
SZ-M031064
CAS No:866923-64-0
Mol.F.: C6H9NS
Mol.Wt.: 127.2
Inv. Status: Custom Synthesis
Rel. CAS No : 1003002-67-2 (Na salt)

Montelukast Impurity 2

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CAT No: SZ-M031065
CAS No: 220927-27-5
Mol.F. : C35H36ClNO3S
Mol.Wt. : 586.2
Inv. Status: Custom Synthesis
SZ-M031065
CAS No:220927-27-5
Mol.F.: C35H36ClNO3S
Mol.Wt.: 586.2
Inv. Status: Custom Synthesis

Montelukast KSM-II Lactone Impurity

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CAT No: SZ-M031066
CAS No: 162515-66-4
Mol.F. : C6H8OS
Mol.Wt. : 128.2
Inv. Status: Custom Synthesis
SZ-M031066
CAS No:162515-66-4
Mol.F.: C6H8OS
Mol.Wt.: 128.2
Inv. Status: Custom Synthesis

Montelukast Impurity 3

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CAT No: SZ-M031067
CAS No: 152922-71-9
Mol.F. : C6H9NO
Mol.Wt. : 111.1
Inv. Status: In Stock
SZ-M031067
CAS No:152922-71-9
Mol.F.: C6H9NO
Mol.Wt.: 111.1
Inv. Status: In Stock

Montelukast Impurity 4

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CAT No: SZ-M031068
CAS No: NA
Mol.F. : C45H56ClNO5S2
Mol.Wt. : 790.5
Inv. Status: In Stock
SZ-M031068
CAS No:NA
Mol.F.: C45H56ClNO5S2
Mol.Wt.: 790.5
Inv. Status: In Stock

Montelukast Impurity 5

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CAT No: SZ-M031069
CAS No: NA
Mol.F. : C45H56ClNO5S2
Mol.Wt. : 790.5
Inv. Status: Custom Synthesis
SZ-M031069
CAS No:NA
Mol.F.: C45H56ClNO5S2
Mol.Wt.: 790.5
Inv. Status: Custom Synthesis

Montelukast EP Impurity C

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CAT No: SZ-M031070
CAS No: NA
Mol.F. : C35H36ClNO4S
Mol.Wt. : 602.2
Inv. Status: Out of Stock, Under Synthesis
Rel. CAS No : 909796-71-0 (Na salt)
SZ-M031070
CAS No:NA
Mol.F.: C35H36ClNO4S
Mol.Wt.: 602.2
Inv. Status: Out of Stock, Under Synthesis
Rel. CAS No : 909796-71-0 (Na salt)

Montelukast Thioglucolate Analog

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CAT No: SZ-M031071
CAS No: NA
Mol.F. : C45H56ClNO5S2
Mol.Wt. : 790.5
Inv. Status: Out of Stock
SZ-M031071
CAS No:NA
Mol.F.: C45H56ClNO5S2
Mol.Wt.: 790.5
Inv. Status: Out of Stock

Montelukast R-Sulfoxide

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CAT No: SZ-M031072
CAS No: 1152185-58-4
Mol.F. : C35H36ClNO4S
Mol.Wt. : 602.2
Inv. Status: Under Synthesis
SZ-M031072
CAS No:1152185-58-4
Mol.F.: C35H36ClNO4S
Mol.Wt.: 602.2
Inv. Status: Under Synthesis