Montelukast

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Pharmaceutical Reference Standards

Montelukast

CAT. No.	CP-M25000
CAS. No.	158966-92-8
Mol. F.	C35H36ClNO3S
Mol. Wt.	586.19
Stock Status:	Custom Synthesis

Rel. Cas No: 151767-02-1 (Na salt) ; 577953-87-8 (K salt) ; 577953-88-9

Montelukast EP Impurity A

CAT. No.	CP-M25001
CAS. No.	190078-45-6
Mol. F.	C35H35ClNNaO3S
Mol. Wt.	608.17
Stock Status:	In Stock

Montelukast EP Impurity B

CAT. No.	CP-M25002
CAS. No.	918972-54-0
Mol. F.	C35H34ClNO2S
Mol. Wt.	568.17
Stock Status:	In Stock

Montelukast EP Impurity C

CAT. No.	CP-M25003
CAS. No.	909849-96-3
Mol. F.	C35H36ClNO4S
Mol. Wt.	602.19
Stock Status:	In Stock

Rel. Cas No: 909796-71-0 (Na salt)

Montelukast EP Impurity E

CAT. No.	CP-M25005
CAS. No.	1187586-58-8
Mol. F.	C41H46ClNO5S2
Mol. Wt.	732.39
Stock Status:	Custom Synthesis

Montelukast EP Impurity F

CAT. No.	CP-M25006
CAS. No.	937275-23-5
Mol. F.	C34H32ClNO3S
Mol. Wt.	570.14
Stock Status:	In Stock

Montelukast EP impurity G

CAT. No.	CP-M25007
CAS. No.	774538-96-4
Mol. F.	C35H36ClNO3S
Mol. Wt.	586.18
Stock Status:	In Stock

Montelukast EP Impurity H

CAT. No.	CP-M25008
CAS. No.	851755-56-1
Mol. F.	C34H32ClNO4S
Mol. Wt.	586.14
Stock Status:	Custom Synthesis

Montelukast EP Impurity I

CAT. No.	CP-M25009
CAS. No.	2045402-27-3
Mol. F.	C35H36ClNO4S
Mol. Wt.	602.19
Stock Status:	In Stock

Montelukast Sulfone

CAT. No.	CP-M25010
CAS. No.	1266620-74-9
Mol. F.	C35H36ClNO5S
Mol. Wt.	618.18
Stock Status:	Custom Synthesis

Montelukast EP Impurity D+E

CAT. No.	CP-M25011
CAS. No.	1242260-05-4
Mol. F.	C41H46ClNO5S2
Mol. Wt.	732.39
Stock Status:	In Stock

Montelukast R-Sulfoxide

CAT. No.	CP-M25012
CAS. No.	1152185-58-4
Mol. F.	C35H36ClNO4S
Mol. Wt.	602.19
Stock Status:	In Stock

Rel. Cas No: 1250264-16-4(sodiumsalt)

Montelukast 1,2-Diol

CAT. No.	CP-M25013
CAS. No.	186352-97-6
Mol. F.	C35H36ClNO4S
Mol. Wt.	602.19
Stock Status:	Custom Synthesis

Montelukast Sodium

CAT. No.	CP-M25014
CAS. No.	151767-02-1
Mol. F.	C35H35ClNNaO3S
Mol. Wt.	608.17
Stock Status:	In Stock

Rel. Cas No: 158966-92-8 (free base) ; 577953-87-8 (K salt) ; 577953-88-9 (Dicyclohexylamine salt)

Montelukast (3S)-Hydroxy Benzoate

CAT. No.	CP-M25015
CAS. No.	142569-69-5
Mol. F.	C28H24ClNO3
Mol. Wt.	457.95
Stock Status:	In Stock

Montelukast Dicyclohexylamine

CAT. No.	CP-M25016
CAS. No.	577953-88-9
Mol. F.	C35H36ClNO3S : C12H23N
Mol. Wt.	586.2 : 181.3
Stock Status:	In Stock

Rel. Cas No: 151767-02-1 (Na salt) ; 577953-87-8 (K salt) ; 158966-92-8 (free base)

Montelukast Ether Impurity

CAT. No.	CP-M25017
CAS. No.	168214-67-3
Mol. F.	C29H26ClNO
Mol. Wt.	439.98
Stock Status:	Custom Synthesis

Montelukast Mercapto Acid Impurity

CAT. No.	CP-M25018
CAS. No.	162515-68-6
Mol. F.	C6H10O2S
Mol. Wt.	146.2
Stock Status:	Custom Synthesis

Rel. Cas No: 952585-15-8 (Na salt) ; 952585-16-9 (K salt)

Montelukast Methoxymethoxy Impurity

CAT. No.	CP-M25019
CAS. No.	184764-27-0
Mol. F.	C37H40ClNO5S
Mol. Wt.	646.24
Stock Status:	Custom Synthesis

Montelukast Nitrile Impurity

CAT. No.	CP-M25020
CAS. No.	866923-62-8
Mol. F.	C35H35ClN2OS
Mol. Wt.	567.19
Stock Status:	Custom Synthesis

Montelukast (3R)-Hydroxy Benzoate

CAT. No.	CP-M25021
CAS. No.	150026-72-5
Mol. F.	C28H24ClNO3
Mol. Wt.	457.95
Stock Status:	Custom Synthesis

Montelukast (3R)-Hydroxy Propanol

CAT. No.	CP-M25022
CAS. No.	150026-75-8
Mol. F.	C29H28ClNO2
Mol. Wt.	458
Stock Status:	Custom Synthesis

Montelukast (3RS)-Hydroxy Propanol

CAT. No.	CP-M25023
CAS. No.	959235-68-8
Mol. F.	C29H28ClNO2
Mol. Wt.	458
Stock Status:	Custom Synthesis

Montelukast (3S)-Hydroxy Methoxymethoxy Impurity

CAT. No.	CP-M25024
CAS. No.	184764-20-3
Mol. F.	C31H32ClNO4
Mol. Wt.	518.05
Stock Status:	Custom Synthesis

Montelukast (3S)-Hydroxy Methylketone

CAT. No.	CP-M25025
CAS. No.	184764-13-4
Mol. F.	C28H24ClNO2
Mol. Wt.	441.96
Stock Status:	Custom Synthesis

21(R)-Hydroxy Montelukast

CAT. No.	CP-M25027
CAS. No.	184763-26-6
Mol. F.	C35H36ClNO4S
Mol. Wt.	602.19
Stock Status:	Custom Synthesis

21(S)-Hydroxy Montelukast

CAT. No.	CP-M25028
CAS. No.	184763-29-9
Mol. F.	C35H36ClNO4S
Mol. Wt.	602.19
Stock Status:	Custom Synthesis

Montelukast 3-Oxo Benzoate

CAT. No.	CP-M25029
CAS. No.	149968-11-6
Mol. F.	C28H22ClNO3
Mol. Wt.	455.94
Stock Status:	Custom Synthesis

Montelukast Acid Methyl Ester

CAT. No.	CP-M25030
CAS. No.	855473-51-7
Mol. F.	C36H38ClNO3S
Mol. Wt.	600.21
Stock Status:	Custom Synthesis

Montelukast Acyl-β-D-Glucuronide Acetate

CAT. No.	CP-M25031
CAS. No.	188717-17-1
Mol. F.	C43H48ClNO11S
Mol. Wt.	822.36
Stock Status:	Custom Synthesis

Montelukast Disulfide Diacid Impurity

CAT. No.	CP-M25032
CAS. No.	162515-67-5
Mol. F.	C12H18O4S2
Mol. Wt.	290.39
Stock Status:	Custom Synthesis

Montelukast Disulfide Dimethyl Ester

CAT. No.	CP-M25033
CAS. No.	1446481-28-2
Mol. F.	C14H22O4S2
Mol. Wt.	318.45
Stock Status:	Custom Synthesis

Montelukast Chloroalcohol Impurity

CAT. No.	CP-M25034
CAS. No.	880769-28-8
Mol. F.	C29H27CI2NO
Mol. Wt.	476.44
Stock Status:	Custom Synthesis

Montelukast Dehydro Impurity

CAT. No.	CP-M25035
CAS. No.	168214-68-4
Mol. F.	C29H26ClNO
Mol. Wt.	439.98
Stock Status:	Custom Synthesis

Montelukast KSM-II Lactone Impurity

CAT. No.	CP-M25036
CAS. No.	162515-66-4
Mol. F.	C6H8OS
Mol. Wt.	128.19
Stock Status:	Custom Synthesis

Montelukast Thioglucolate Analog

CAT. No.	CP-M25037
CAS. No.	NA
Mol. F.	C45H56ClNO5S2
Mol. Wt.	790.52
Stock Status:	Custom Synthesis

Montelukast Impurity 21

CAT. No.	CP-M25038
CAS. No.	142542-48-1
Mol. F.	C29H28ClNO2
Mol. Wt.	458
Stock Status:	In Stock

Montelukast Ketone impurity

CAT. No.	CP-M25040
CAS. No.	1258428-71-5
Mol. F.	C29H26ClNO2
Mol. Wt.	455.98
Stock Status:	Custom Synthesis

a b c d e f g h i j k l m n o p q r s t u v w x y z

Montelukast

Pharmaceutical Reference Standards

Montelukast

Montelukast EP Impurity A

Montelukast EP Impurity B

Montelukast EP Impurity C

Montelukast EP Impurity E

Montelukast EP Impurity F

Montelukast EP impurity G

Montelukast EP Impurity H

Montelukast EP Impurity I

Montelukast Sulfone

Montelukast EP Impurity D+E

Montelukast R-Sulfoxide

Montelukast 1,2-Diol

Montelukast Sodium

Montelukast (3S)-Hydroxy Benzoate

Montelukast Dicyclohexylamine

Montelukast Ether Impurity

Montelukast Mercapto Acid Impurity

Montelukast Methoxymethoxy Impurity

Montelukast Nitrile Impurity

Montelukast (3R)-Hydroxy Benzoate

Montelukast (3R)-Hydroxy Propanol

Montelukast (3RS)-Hydroxy Propanol

Montelukast (3S)-Hydroxy Methoxymethoxy Impurity

Montelukast (3S)-Hydroxy Methylketone

21(R)-Hydroxy Montelukast

21(S)-Hydroxy Montelukast

Montelukast 3-Oxo Benzoate

Montelukast Acid Methyl Ester

Montelukast Acyl-β-D-Glucuronide Acetate

Montelukast Disulfide Diacid Impurity

Montelukast Disulfide Dimethyl Ester

Montelukast Chloroalcohol Impurity

Montelukast Dehydro Impurity

Montelukast KSM-II Lactone Impurity

Montelukast Thioglucolate Analog

Montelukast Impurity 21

Montelukast Ketone impurity