Montelukast Related Products

SynZeal is a leading innovator in pharmaceutical reference standards. We supply high-quality Reference Standards of Montelukast, pharmacopeial and non-pharmacopeial Montelukast impurities, metabolites, stable isotope products, and nitrosamines (N-NO products). Montelukast impurities reference standards are useful in pharmaceutical research. They are useful in product development, ANDA and DMF filing, quality control (QC), method validation, and stability studies. It is also useful in the identification of unknown impurities and the assessment of genotoxic potential.

Montelukast-related products are thoroughly characterized. Montelukast products are supplied with detailed COA & analytical data meeting regulatory compliance. We can also provide EP/USP traceable standards based on your requirements. The supplied products are re-tested at regular intervals.

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cis-Montelukast Sulfoxide

• SZ CAT No: SZ-M031075

• CAS No:

  1428448-97-8

• Mol.F.: C35H35ClNO4S : Na
• Mol.Wt.: 601.2 : 23.0
• Inv. Status: In Stock
• Rel. CAS No: 1428511-42-5 (free base)

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Montelukast

• SZ CAT No: SZ-M031000

• CAS No:

  158966-92-8

• Mol.F.: C35H36ClNO3S
• Mol.Wt.: 586.2
• Inv. Status: In Stock
• Rel. CAS No: 151767-02-1 (Na salt) ; 577953-87-8 (K salt) ; 577953-88-9 (Dicyclohexylamine salt)

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Montelukast (3R)-Hydroxy Propanol

• SZ CAT No: SZ-M031044

• CAS No:

  150026-75-8

• Mol.F.: C29H28ClNO2
• Mol.Wt.: 458.0
• Inv. Status: In Stock

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Montelukast (3RS)-Hydroxy Propanol

• SZ CAT No: SZ-M031045

• CAS No:

  959235-68-8

• Mol.F.: C29H28ClNO2
• Mol.Wt.: 458.0
• Inv. Status: In Stock

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Montelukast (3S)-Hydroxy Benzoate

• SZ CAT No: SZ-M031046

• CAS No:

  142569-69-5

• Mol.F.: C28H24ClNO3
• Mol.Wt.: 458.0
• Inv. Status: In Stock

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Montelukast (3S)-Hydroxy Methylketone

• SZ CAT No: SZ-M031048

• CAS No:

  184764-13-4

• Mol.F.: C28H24ClNO2
• Mol.Wt.: 442.0
• Inv. Status: In Stock

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Montelukast (3S)-Hydroxy Propanol

• SZ CAT No: SZ-M031049

• CAS No:

  142569-70-8

• Mol.F.: C29H28ClNO2
• Mol.Wt.: 458.0
• Inv. Status: In Stock

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Montelukast 3-Oxo Benzoate

• SZ CAT No: SZ-M031053

• CAS No:

  149968-11-6

• Mol.F.: C28H22ClNO3 
• Mol.Wt.: 455.9
• Inv. Status: In Stock

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Montelukast Acid Methyl Ester

• SZ CAT No: SZ-M031054

• CAS No:

  855473-51-7

• Mol.F.: C36H38ClNO3S
• Mol.Wt.: 600.2
• Inv. Status: In Stock

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Montelukast Amide

• SZ CAT No: SZ-M031056

• CAS No:

  866923-63-9

• Mol.F.: C35H37ClN2O2S
• Mol.Wt.: 585.2
• Inv. Status: In Stock

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Montelukast Chloroalcohol impurity

• SZ CAT No: SZ-M031062

• CAS No:

  880769-28-8

• Mol.F.: C29H27CI2NO
• Mol.Wt.: 476.4
• Inv. Status: In Stock

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Montelukast Dicyclohexylamine

• SZ CAT No: SZ-M031058

• CAS No:

  577953-88-9

• Mol.F.: C35H36ClNO3S : C12H23N
• Mol.Wt.: 586.2 : 181.3
• Inv. Status: In Stock
• Rel. CAS No: 151767-02-1 (Na salt) ; 577953-87-8 (K salt) ; 158966-92-8 (free base)

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Montelukast Dihydro Impurity

• SZ 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)

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Montelukast Disulfide Diacid Impurity

• SZ CAT No: SZ-M031060

• CAS No:

  162515-67-5

• Mol.F.: C12H18O4S2
• Mol.Wt.: 290.4
• Inv. Status: In Stock

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Montelukast Disulfide Dimethyl Ester

• SZ CAT No: SZ-M031061

• CAS No:

  1446481-28-2

• Mol.F.: C14H22O4S2
• Mol.Wt.: 318.5
• Inv. Status: In Stock

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Montelukast EP Impurity B

• SZ 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)

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Montelukast EP Impurity C

• SZ CAT No: SZ-M031070

• CAS No:

  909849-96-3

• Mol.F.: C35H36ClNO4S
• Mol.Wt.: 602.2
• Inv. Status: In Stock
• Rel. CAS No: 909796-71-0 (Na salt)

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Montelukast EP Impurity D

• SZ CAT No: SZ-M031024

• CAS No:

  1187586-61-3

• Mol.F.: C41H46ClNO5S2
• Mol.Wt.: 732.4
• Inv. Status: In Stock

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Montelukast EP Impurity E

• SZ CAT No: SZ-M031025

• CAS No:

  1187586-58-8

• Mol.F.: C41H46ClNO5S2
• Mol.Wt.: 732.4
• Inv. Status: In Stock

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Montelukast EP Impurity F

• SZ CAT No: SZ-M031026

• CAS No:

  937275-23-5

• Mol.F.: C34H32ClNO3S
• Mol.Wt.: 570.1
• Inv. Status: In Stock

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Montelukast EP Impurity G

• SZ CAT No: SZ-M031027

• CAS No:

  774538-96-4

• Mol.F.: C35H36ClNO3S
• Mol.Wt.: 586.2
• Inv. Status: In Stock
• Rel. CAS No: 1428448-96-7 (Na salt)

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Montelukast EP Impurity H

• SZ CAT No: SZ-M031028

• CAS No:

  851755-56-1

• Mol.F.: C34H32ClNO4S
• Mol.Wt.: 586.1
• Inv. Status: In Stock
• Rel. CAS No: 2244776-97-2 (Na salt) ; 906107-37-7 (HCl salt)

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Montelukast Ether Impurity

• SZ CAT No: SZ-M031030

• CAS No:

  168214-67-3

• Mol.F.: C29H26ClNO
• Mol.Wt.: 440.0
• Inv. Status: In Stock

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Montelukast Impurity

• SZ CAT No: SZ-M031041

• CAS No:

  152922-86-6

• Mol.F.: C7H11NO3S
• Mol.Wt.: 189.2
• Inv. Status: In Stock

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Montelukast Impurity 10

• SZ CAT No: SZ-M031083

• CAS No:

  NA

• Mol.F.: C45H56ClNO5S2
• Mol.Wt.: 790.5
• Inv. Status: In Stock

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Montelukast Impurity 3

• SZ CAT No: SZ-M031067

• CAS No:

  152922-71-9

• Mol.F.: C6H9NO
• Mol.Wt.: 111.1
• Inv. Status: In Stock

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Montelukast Impurity 4

• SZ CAT No: SZ-M031068

• CAS No:

  NA

• Mol.F.: C45H56ClNO5S2
• Mol.Wt.: 790.5
• Inv. Status: In Stock

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Montelukast Ketone Impurity (USP)

• SZ CAT No: SZ-M031032

• CAS No:

  1258428-71-5

• Mol.F.: C29H26ClNO2
• Mol.Wt.: 456.0
• Inv. Status: In Stock

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Montelukast Mercapto Acid Impurity

• SZ CAT No: SZ-M031034

• CAS No:

  162515-68-6

• Mol.F.: C6H10O2S
• Mol.Wt.: 146.2
• Inv. Status: In Stock
• Rel. CAS No: 952585-15-8 (Na salt) ; 952585-16-9 (K salt)

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Montelukast Methyl Ether

• SZ CAT No: SZ-M031036

• CAS No:

  1351973-25-5

• Mol.F.: C36H38ClNO3S
• Mol.Wt.: 600.2
• Inv. Status: In Stock

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Montelukast Racemate

• SZ CAT No: SZ-M031038

• CAS No:

  220927-26-4

• Mol.F.: C35H36ClNO3S
• Mol.Wt.: 586.2
• Inv. Status: In Stock

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Montelukast Sodium

• SZ 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 (free base) ; 577953-87-8 (K salt); 577953-88-9 (Dicyclohexylamine salt)

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Montelukast Sodium EP Impurity A

• SZ CAT No: SZ-M031021

• CAS No:

  190078-45-6

• Mol.F.: C35H35ClNNaO3S
• Mol.Wt.: 608.2
• Inv. Status: In Stock
• Rel. CAS No: 220927-27-5 (free base)

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Montelukast Sodium EP Impurity G

• SZ CAT No: SZ-M031078

• CAS No:

  1428448-96-7

• Mol.F.: C35H35ClNO3S : Na
• Mol.Wt.: 585.2 : 23.0
• Inv. Status: In Stock
• Rel. CAS No: 774538-96-4 (free base)

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Montelukast S-Sulfoxide

• SZ CAT No: SZ-M031086

• CAS No:

  184763-44-8

• Mol.F.: C35H36ClNO4S
• Mol.Wt.: 602.2
• Inv. Status: In Stock

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Montelukast Sulfoxide (USP)

• SZ CAT No: SZ-M031087

• CAS No:

  1152185-58-4

• Mol.F.: C35H36ClNO4S
• Mol.Wt.: 602.2
• Inv. Status: In Stock
• Rel. CAS No: 1250264-16-4 (sodium salt)

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Montelukast Bis-Sulfide

• SZ CAT No: SZ-M031042

• CAS No:

  1242260-05-4

• Mol.F.: C41H46ClNO5S2
• Mol.Wt.: 732.4
• Inv. Status: Limited Stock

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Montelukast Nitrile Impurity

• SZ CAT No: SZ-M031037

• CAS No:

  866923-62-8

• Mol.F.: C35H35ClN2OS
• Mol.Wt.: 567.2
• Inv. Status: Limited Stock

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Montelukast R-Sulfoxide

• SZ CAT No: SZ-M031072

• CAS No:

  184763-47-1

• Mol.F.: C35H36ClNO4S
• Mol.Wt.: 602.2
• Inv. Status: Limited Stock

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Montelukast (3R)-Hydroxy Benzoate

• SZ CAT No: SZ-M031043

• CAS No:

  150026-72-5

• Mol.F.: C28H24ClNO3
• Mol.Wt.: 458.0
• Inv. Status: Synthesis on demand

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Montelukast (3S)-Hydroxy Methoxymethoxy Impurity

• SZ CAT No: SZ-M031047

• CAS No:

  184764-20-3

• Mol.F.: C31H32ClNO4
• Mol.Wt.: 518.0
• Inv. Status: Synthesis on demand

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Montelukast (R)-Hydroxy Metabolite

• SZ CAT No: SZ-M031050

• CAS No:

  184763-26-6

• Mol.F.: C35H36ClNO4S
• Mol.Wt.: 602.2
• Inv. Status: Synthesis on demand

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Montelukast (S)-Hydroxy Metabolite

• SZ CAT No: SZ-M031051

• CAS No:

  184763-29-9

• Mol.F.: C35H36ClNO4S
• Mol.Wt.: 602.2
• Inv. Status: Synthesis on demand

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Montelukast 1,2-Diol

• SZ CAT No: SZ-M031052

• CAS No:

  186352-97-6

• Mol.F.: C35H36ClNO4S
• Mol.Wt.: 602.2
• Inv. Status: Synthesis on demand

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Montelukast Acid Impurity

• SZ CAT No: SZ-M031094

• CAS No:

  NA

• Mol.F.: C33H28ClNO4S2 : 2(Na)
• Mol.Wt.: 570.1 : 2(23.0)
• Inv. Status: Synthesis on demand

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Montelukast Acyl-β-D-Glucuronide Acetate

• SZ CAT No: SZ-M031055

• CAS No:

  188717-17-1

• Mol.F.: C43H48ClNO11S
• Mol.Wt.: 822.4
• Inv. Status: Synthesis on demand

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Montelukast Dehydro Impurity

• SZ CAT No: SZ-M031063

• CAS No:

  168214-68-4

• Mol.F.: C29H26ClNO
• Mol.Wt.: 440.0
• Inv. Status: Synthesis on demand

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Montelukast Dicarboxylic Acid

• SZ CAT No: SZ-M031057

• CAS No:

  213380-27-9

• Mol.F.: C35H34ClNO5S
• Mol.Wt.: 616.2
• Inv. Status: Synthesis on demand

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Montelukast Dihydrate

• SZ CAT No: SZ-M031091

• CAS No:

  NA

• Mol.F.: C35H36ClNO3S : 2(H2O)
• Mol.Wt.: 586.2 : 2(18.0)
• Inv. Status: Synthesis on demand

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Montelukast Dimer Impurity

• SZ CAT No: SZ-M031092

• CAS No:

  120578-04-3

• Mol.F.: C28H18Cl2N2
• Mol.Wt.: 453.4
• Inv. Status: Synthesis on demand

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Montelukast EP Impurity C (sodium salt)

• SZ CAT No: SZ-M031097

• CAS No:

  909796-71-0

• Mol.F.: C35H35ClNO4S : Na
• Mol.Wt.: 601.2 : 23.0
• Inv. Status: Synthesis on demand
• Rel. CAS No: 909849-96-3 (free base)

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Montelukast EP Impurity I

• SZ CAT No: SZ-M031029

• CAS No:

  2045402-27-3

• Mol.F.: C35H36ClNO4S
• Mol.Wt.: 602.2
• Inv. Status: Synthesis on demand

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Montelukast Impurity 1

• SZ CAT No: SZ-M031064

• CAS No:

  866923-64-0

• Mol.F.: C6H9NS
• Mol.Wt.: 127.2
• Inv. Status: Synthesis on demand
• Rel. CAS No: 1003002-67-2 (Na salt)

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Montelukast Impurity 11

• SZ CAT No: SZ-M031084

• CAS No:

  855473-50-6

• Mol.F.: C7H11BrO2
• Mol.Wt.: 207.1
• Inv. Status: Synthesis on demand

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Montelukast Impurity 12

• SZ CAT No: SZ-M031085

• CAS No:

  3580-97-0

• Mol.F.: C7H11Br3O2
• Mol.Wt.: 366.9
• Inv. Status: Synthesis on demand

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Montelukast Impurity 14

• SZ CAT No: SZ-M031089

• CAS No:

  120578-03-2

• Mol.F.: C18H12ClNO
• Mol.Wt.: 293.8
• Inv. Status: Synthesis on demand

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Montelukast Impurity 15

• SZ CAT No: SZ-M031090

• CAS No:

  152922-72-0

• Mol.F.: C8H11NOS
• Mol.Wt.: 169.2
• Inv. Status: Synthesis on demand

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Montelukast Impurity 16

• SZ CAT No: SZ-M031093

• CAS No:

  149968-10-5

• Mol.F.: C20H16ClNO
• Mol.Wt.: 321.8
• Inv. Status: Synthesis on demand

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Montelukast Impurity 17

• SZ CAT No: SZ-M031095

• CAS No:

  NA

• Mol.F.: C42H48ClNO5S2
• Mol.Wt.: 746.4
• Inv. Status: Synthesis on demand

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Montelukast Impurity 18

• SZ CAT No: SZ-M031096

• CAS No:

  1351973-24-4

• Mol.F.: C41H44ClNO4S2
• Mol.Wt.: 714.4
• Inv. Status: Synthesis on demand

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Montelukast Impurity 19

• SZ CAT No: SZ-M031099

• CAS No:

  181139-72-0

• Mol.F.: C28H24ClNO3
• Mol.Wt.: 458.0
• Inv. Status: Synthesis on demand

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Montelukast Impurity 20

• SZ CAT No: SZ-M031100

• CAS No:

  287930-77-2

• Mol.F.: C29H28ClNO2
• Mol.Wt.: 458.0
• Inv. Status: Synthesis on demand

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Montelukast Impurity 21

• SZ CAT No: SZ-M031101

• CAS No:

  NA

• Mol.F.: C35H36ClNO4S
• Mol.Wt.: 602.2
• Inv. Status: Synthesis on demand

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Montelukast Impurity 22

• SZ CAT No: SZ-M031102

• CAS No:

  945934-74-7

• Mol.F.: C7H11N3S : HBr
• Mol.Wt.: 169.2 : 80.9
• Inv. Status: Synthesis on demand
• Rel. CAS No: 945948-91-4 (Free base)

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Montelukast Impurity 8

• SZ CAT No: SZ-M031081

• CAS No:

  136476-38-5

• Mol.F.: C7H14O6S2
• Mol.Wt.: 258.3
• Inv. Status: Synthesis on demand

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Montelukast Impurity 9

• SZ CAT No: SZ-M031082

• CAS No:

  807638-71-7

• Mol.F.: C30H30ClNO4S
• Mol.Wt.: 536.1
• Inv. Status: Synthesis on demand

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Montelukast KSM-II Lactone Impurity

• SZ CAT No: SZ-M031066

• CAS No:

  162515-66-4

• Mol.F.: C6H8OS
• Mol.Wt.: 128.2
• Inv. Status: Synthesis on demand

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Montelukast Lactone

• SZ CAT No: SZ-M031033

• CAS No:

  1100617-38-6

• Mol.F.: C27H20ClNO2
• Mol.Wt.: 425.9
• Inv. Status: Synthesis on demand

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Montelukast Methoxymethoxy Impurity

• SZ CAT No: SZ-M031035

• CAS No:

  184764-27-0

• Mol.F.: C37H40ClNO5S
• Mol.Wt.: 646.2
• Inv. Status: Synthesis on demand

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Montelukast Racemate Dicyclohexylamine

• SZ CAT No: SZ-M031098

• CAS No:

  NA

• Mol.F.: C35H36ClNO3S : C12H23N
• Mol.Wt.: 586.2 : 181.3
• Inv. Status: Synthesis on demand
• Rel. CAS No: 220927-26-4 (free base)

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Montelukast Sodium EP Impurity B

• SZ CAT No: SZ-M031077

• CAS No:

  1146137-52-1

• Mol.F.: C35H33ClNO2S : Na
• Mol.Wt.: 567.2 : 23.0
• Inv. Status: Synthesis on demand
• Rel. CAS No: 918972-54-0 (free base)

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Montelukast Sulfone

• SZ CAT No: SZ-M031040

• CAS No:

  1266620-74-9

• Mol.F.: C35H36ClNO5S
• Mol.Wt.: 618.2
• Inv. Status: Synthesis on demand

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Montelukast Thioglucolate Analog

• SZ CAT No: SZ-M031071

• CAS No:

  NA

• Mol.F.: C45H56ClNO5S2
• Mol.Wt.: 790.5
• Inv. Status: Synthesis on demand

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Montelukast Hydroxy Metabolite

• SZ CAT No: SZ-M031103

• CAS No:

  679838-32-5

• Mol.F.: C35H36ClNO4S
• Mol.Wt.: 602.2
• Inv. Status: Under Synthesis

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Montelukast Ketocarbinol Impurity

• SZ CAT No: SZ-M031031

• CAS No:

  2682015-83-2

• Mol.F.: C34H32ClNO4S
• Mol.Wt.: 586.1
• Inv. Status: Under Synthesis

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Montelukast-D6 Sodium Salt

• SZ CAT No: SZ-M031D01

• CAS No:

  2673270-26-1

• Mol.F.: C35H29D6ClNO3S : Na
• Mol.Wt.: 591.2 : 23.0
• Inv. Status: Synthesis on demand
• Rel. CAS No: 1093746-29-2 (free base)