Montelukast Related Products 
Venkatasai is a leading innovator in the field of pharmaceutical reference standards, offering high-quality Reference Standards of Abacavir, including both pharmacopeial and non-pharmacopeial impurities, metabolites, stable isotope-labeled compounds, and nitrosamines (N-NO products). Our Abacavir impurity reference standards play a vital role in pharmaceutical research, supporting product development, ANDA and DMF filings, quality control (QC), method validation, and stability studies. They are also instrumental in identifying unknown impurities and evaluating genotoxic potential. All Abacavir-related products are thoroughly characterized and supplied with comprehensive Certificates of Analysis (COA) and analytical data that comply with regulatory standards. EP/USP traceable standards can also be provided upon request. Furthermore, all supplied products undergo periodic re-testing to ensure continued quality and reliability.
Montelukast EP Impurity D+E (Michael Adduct 1+2)
CAT No: VS-M084025
CAS No: 2125943-58-8
Mol.F.: C41H46ClNO5S2
Mol.Wt.: 732.4
Status: In Stock
Montelukast (3R)-Hydroxy Benzoate
CAT No: VS-M084001
CAS No: 150026-72-5
Mol.F.: C28H24ClNO3
Mol.Wt.: 458
Status: In Stock
Montelukast (3R)-Hydroxy Propanol
CAT No: VS-M084002
CAS No: 150026-75-8
Mol.F.: C29H28ClNO2
Mol.Wt.: 458
Status: Custom Synthesis
Montelukast (3RS)-Hydroxy Propanol
CAT No: VS-M084003
CAS No: 959235-68-8
Mol.F.: C29H28ClNO2
Mol.Wt.: 458
Status: Custom Synthesis
Montelukast (3S)-Hydroxy Benzoate
CAT No: VS-M084004
CAS No: 142569-69-5
Mol.F.: C28H24ClNO3
Mol.Wt.: 458
Status: Custom Synthesis
Montelukast (3S)-Hydroxy Methoxymethoxy Impurity
CAT No: VS-M084005
CAS No: 184764-20-3
Mol.F.: C31H32ClNO4
Mol.Wt.: 518
Status: Custom Synthesis
Montelukast (3S)-Hydroxy Methylketone
CAT No: VS-M084006
CAS No: 184764-13-4
Mol.F.: C28H24ClNO2
Mol.Wt.: 442
Status: In Stock
Montelukast (3S)-Hydroxy Propanol
CAT No: VS-M084007
CAS No: 287930-77-2
Mol.F.: C29H28ClNO2
Mol.Wt.: 458
Status: Custom Synthesis
Montelukast (R)-Hydroxy Metabolite
CAT No: VS-M084008
CAS No: 184763-26-6
Mol.F.: C35H36ClNO4S
Mol.Wt.: 602.2
Status: Custom Synthesis
Montelukast (S)-Hydroxy Metabolite
CAT No: VS-M084009
CAS No: 184763-29-9
Mol.F.: C35H36ClNO4S
Mol.Wt.: 602.2
Status: Custom Synthesis
Montelukast 1,2-Diol
CAT No: VS-M084010
CAS No: 186352-97-6
Mol.F.: C35H36ClNO4S
Mol.Wt.: 602.2
Status: Custom Synthesis
Montelukast 3-Oxo Benzoate
CAT No: VS-M084011
CAS No: 149968-11-6
Mol.F.: C28H22ClNO3
Mol.Wt.: 455.9
Status: In Stock
Montelukast Acid Impurity
CAT No: VS-M084055
CAS No: NA
Mol.F.: C33H28ClNO4S2 : 2(Na)
Mol.Wt.: 570.1 : 2(23.0)
Status: Custom Synthesis
Montelukast Acid Methyl Ester
CAT No: VS-M084012
CAS No: 855473-51-7
Mol.F.: C36H38ClNO3S
Mol.Wt.: 600.2
Status: Custom Synthesis
Montelukast Acyl-β-D-Glucuronide Acetate
CAT No: VS-M084013
CAS No: 188717-17-1
Mol.F.: C43H48ClNO11S
Mol.Wt.: 822.4
Status: Custom Synthesis
Montelukast Amide
CAT No: VS-M084014
CAS No: 866923-63-9
Mol.F.: C35H37ClN2O2S
Mol.Wt.: 585.2
Status: Custom Synthesis
Montelukast Chloroalcohol impurity
CAT No: VS-M084043
CAS No: 880769-28-8
Mol.F.: C29H27CI2NO
Mol.Wt.: 476.4
Status: Limited Stock
Montelukast Dehydro Impurity
CAT No: VS-M084044
CAS No: 168214-68-4
Mol.F.: C29H26ClNO
Mol.Wt.: 440
Status: Custom Synthesis
Montelukast Dicarboxylic Acid Disodium Salt
CAT No: VS-M084015
CAS No: 213380-27-9
Mol.F.: C35H32ClNNa2O5S
Mol.Wt.: 660.1
Status: Custom Synthesis
Montelukast Dicyclohexylamine
CAT No: VS-M084016
CAS No: 577953-88-9
Mol.F.: C35H36ClNO3S : C12H23N
Mol.Wt.: 586.2 : 181.3
Status: Custom Synthesis
Montelukast Dihydro Impurity
CAT No: VS-M084017
CAS No: 142147-98-6
Mol.F.: C35H38ClNO3S : Na
Mol.Wt.: 588.2 : 23.0
Status: In Stock
Montelukast Dimer Impurity
CAT No: VS-M084054
CAS No: 120578-04-3
Mol.F.: C28H18Cl2N2
Mol.Wt.: 453.4
Status: Custom Synthesis
Montelukast Disulfide Diacid Impurity
CAT No: VS-M084018
CAS No: 162515-67-5
Mol.F.: C12H18O4S2
Mol.Wt.: 290.4
Status: Custom Synthesis
Montelukast Disulfide Dimethyl Ester
CAT No: VS-M084019
CAS No: 1446481-28-2
Mol.F.: C14H22O4S2
Mol.Wt.: 318.5
Status: Custom Synthesis
Montelukast EP Impurity A
CAT No: VS-M084049
CAS No: 220927-27-5
Mol.F.: C35H36ClNO3S
Mol.Wt.: 586.2
Status: Custom Synthesis
Montelukast EP Impurity A (Sodium Salt)
CAT No: VS-M084020
CAS No: 190078-45-6
Mol.F.: C35H35ClNNaO3S
Mol.Wt.: 608.2
Status: In Stock
Montelukast EP Impurity B
CAT No: VS-M084021
CAS No: 918972-54-0
Mol.F.: C35H34ClNO2S
Mol.Wt.: 568.2
Status: In Stock
Montelukast EP Impurity C
CAT No: VS-M084022
CAS No: 909849-96-3
Mol.F.: C35H36ClNO4S
Mol.Wt.: 602.2
Status: In Stock
Montelukast EP Impurity C (R isomer)
CAT No: VS-M084023
CAS No: N/A
Mol.F.: C35H36ClNO4S
Mol.Wt.: 602.2
Status: Custom Synthesis
Montelukast EP Impurity D
CAT No: VS-M084024
CAS No: 1187586-61-3
Mol.F.: C41H46ClNO5S2
Mol.Wt.: 732.4
Status: Out of Stock
Montelukast EP Impurity E
CAT No: VS-M084026
CAS No: 1187586-58-8
Mol.F.: C41H46ClNO5S2
Mol.Wt.: 732.4
Status: Out of Stock
Montelukast EP Impurity F
CAT No: VS-M084027
CAS No: 937275-23-5
Mol.F.: C34H32ClNO3S
Mol.Wt.: 570.1
Status: In Stock
Montelukast EP Impurity G
CAT No: VS-M084028
CAS No: 774538-96-4
Mol.F.: C35H36ClNO3S
Mol.Wt.: 586.2
Status: In Stock
Montelukast EP Impurity H
CAT No: VS-M084029
CAS No: 851755-56-1
Mol.F.: C34H32ClNO4S
Mol.Wt.: 586.1
Status: Custom Synthesis
Montelukast EP Impurity I
CAT No: VS-M084030
CAS No: 2045402-27-3
Mol.F.: C35H36ClNO4S
Mol.Wt.: 602.2
Status: Custom Synthesis
Montelukast Ether Impurity
CAT No: VS-M084031
CAS No: 168214-67-3
Mol.F.: C29H26ClNO
Mol.Wt.: 440
Status: Custom Synthesis
Montelukast Impurity
CAT No: VS-M084042
CAS No: 152922-86-6
Mol.F.: C7H11NO3S
Mol.Wt.: 189.2
Status: Custom Synthesis
Montelukast Impurity 1
CAT No: VS-M084048
CAS No: 866923-64-0
Mol.F.: C6H9NS
Mol.Wt.: 127.2
Status: Custom Synthesis
Montelukast Impurity 3
CAT No: VS-M084050
CAS No: 152922-71-9
Mol.F.: C6H9NO
Mol.Wt.: 111.1
Status: Custom Synthesis
Montelukast Impurity 4
CAT No: VS-M084051
CAS No: N/A
Mol.F.: C45H56ClNO5S2
Mol.Wt.: 790.5
Status: Custom Synthesis
Montelukast Impurity 5
CAT No: VS-M084052
CAS No: N/A
Mol.F.: C45H56ClNO5S2
Mol.Wt.: 790.5
Status: Custom Synthesis
Montelukast Impurity 6
CAT No: VS-M084053
CAS No: 142569-70-8
Mol.F.: C29H28ClNO2
Mol.Wt.: 457.99
Status: Custom Synthesis
Montelukast Impurity 7
CAT No: VS-M084056
CAS No: 152922-72-0
Mol.F.: C8H11NOS
Mol.Wt.: 169.2
Status: Custom Synthesis
Montelukast Impurity 8
CAT No: VS-M084057
CAS No: 149968-10-5
Mol.F.: C20H16ClNO
Mol.Wt.: 321.8
Status: Custom Synthesis
Montelukast Impurity 9
CAT No: VS-M084058
CAS No: 181139-72-0
Mol.F.: C28H24ClNO3
Mol.Wt.: 458.01
Status: Custom Synthesis
Montelukast Ketocarbinol Impurity
CAT No: VS-M084032
CAS No: N/A
Mol.F.: C34H32ClNO4S
Mol.Wt.: 586.1
Status: Custom Synthesis
Montelukast Ketone Impurity
CAT No: VS-M084033
CAS No: 1258428-71-5
Mol.F.: C29H26ClNO2
Mol.Wt.: 456
Status: In Stock
Montelukast KSM-II Lactone Impurity
CAT No: VS-M084045
CAS No: 162515-66-4
Mol.F.: C6H8OS
Mol.Wt.: 128.2
Status: Custom Synthesis
Montelukast Lactone
CAT No: VS-M084034
CAS No: 1100617-38-6
Mol.F.: C27H20ClNO2
Mol.Wt.: 425.9
Status: Custom Synthesis
Montelukast Mercapto Acid Impurity
CAT No: VS-M084035
CAS No: 162515-68-6
Mol.F.: C6H10O2S
Mol.Wt.: 146.2
Status: Custom Synthesis
Montelukast Methoxymethoxy Impurity
CAT No: VS-M084036
CAS No: 184764-27-0
Mol.F.: C37H40ClNO5S
Mol.Wt.: 646.2
Status: Custom Synthesis
Montelukast Methyl Ether
CAT No: VS-M084037
CAS No: 1351973-25-5
Mol.F.: C36H38ClNO3S
Mol.Wt.: 600.2
Status: Custom Synthesis
Montelukast Nitrile Impurity
CAT No: VS-M084038
CAS No: 866923-62-8
Mol.F.: C35H35ClN2OS
Mol.Wt.: 567.2
Status: In Stock
Montelukast Racemate (Acid)
CAT No: VS-M084039
CAS No: N/A
Mol.F.: C35H36ClNO3S
Mol.Wt.: 586.2
Status: Custom Synthesis
Montelukast R-Sulfoxide
CAT No: VS-M084047
CAS No: 1152185-58-4
Mol.F.: C35H36ClNO4S
Mol.Wt.: 602.2
Status: Custom Synthesis
Montelukast Sodium
CAT No: VS-M084040
CAS No: 151767-02-1
Mol.F.: C35H35ClNNaO3S
Mol.Wt.: 608.2
Status: In Stock
Montelukast Sulfone
CAT No: VS-M084041
CAS No: 1266620-74-9
Mol.F.: C35H36ClNO5S
Mol.Wt.: 618.2
Status: Custom Synthesis
Montelukast Thioglucolate Analog
CAT No: VS-M084046
CAS No: N/A
Mol.F.: C45H56ClNO5S2
Mol.Wt.: 790.5
Status: Custom Synthesis
