API Impurities
MICHAEL ADDUCTS 1 AND 2 IMPURITY
Chemical Name: 1-[[[(1R)-1-[3-[(1R)-1-[[[1-(Carboxymeth...
CAS No:
2125943-58-8
Molecular Formula: C41H46ClNO5S2
Molecular Weight: 732.39
CAT No:
ALL-MON-MA
Keywords:
Inventory Status:IN STOCK-970-103
-Hydroxy Benzoate.png)
Montelukast (3R)-Hydroxy Benzoate
Chemical Name: 2-[(3R)-(2-(7-Chloro-2-quinolinyl)-ethen...
CAS No:
150026-72-5
Molecular Formula: C28H24ClNO3
Molecular Weight: 457.95
CAT No:
ALL-MON-2160
Keywords: Montelukast (3R)-Hydroxy Benzoate, 2-[(3...
Inventory Status:In Stock-926-103
-Hydroxy Propanol.png)
Montelukast (3R)-Hydroxy Propanol / Montelukast (3R)-Hydroxy Propanol
Chemical Name: (R)-2-(2-(3-(2-(7-Chloro-2-quinolinyl)-e...
CAS No:
150026-75-8
Molecular Formula: C29H28ClNO2
Molecular Weight: 457.99
CAT No:
ALL-MON-2161
Keywords: Montelukast (3R)-Hydroxy Propanol / Mont...
Inventory Status:In Stock-927-103
Montelukast (3RS)-Hydroxy Propanol
Chemical Name: 2-[(3RS)-(2-(7-Chloro-2-quinolinyl)- eth...
CAS No:
NA
Molecular Formula: C29H28ClNO2
Molecular Weight: 457.99
CAT No:
ALL-MON-2162
Keywords: Montelukast (3RS)-Hydroxy Propanol, 2-[(...
Inventory Status:In Stock-928-103
-Chloro Alcohol Impurity.png)
Montelukast (3S)-Chloro Alcohol Impurity
Chemical Name: 2-[2-[(3S)-[3(E)-[2-(7-Chloroquinolin-2-...
CAS No:
NA
Molecular Formula: C29H27Cl2NO
Molecular Weight: 476.44
CAT No:
ALL-MON-2163
Keywords: Montelukast (3S)-Chloro Alcohol Impurity...
Inventory Status:In Stock-929-103
-Hydroxy Benzoate.png)
Montelukast (3S)-Hydroxy Benzoate
Chemical Name: 2-[(3S)-(2-(7-Chloro-2-quinolinyl)-ethen...
CAS No:
142569-69-5
Molecular Formula: C28H24ClNO3
Molecular Weight: 457.95
CAT No:
ALL-MON-2164
Keywords: Montelukast (3S)-Hydroxy Benzoate, 2-[(3...
Inventory Status:In Stock-930-103
-Hydroxy Methoxymethoxy Impurity.png)
Montelukast (3S)-Hydroxy Methoxymethoxy Impurity
Chemical Name: 2-[3-(S)-[3-(2-(7-Chloro-2-quinolinyl)et...
CAS No:
184764-20-3
Molecular Formula: C31H32ClNO4
Molecular Weight: 518.04
CAT No:
ALL-MON-2165
Keywords: Montelukast (3S)-Hydroxy Methoxymethoxy ...
Inventory Status:In Stock-931-103
-Hydroxy Methylketone.png)
Montelukast (3S)-Hydroxy Methylketone
Chemical Name: 1-[2-[(3S)-3-[3-[(1E)-2-(7-Chloro-2-quin...
CAS No:
184764-13-4
Molecular Formula: C28H24ClNO2
Molecular Weight: 441.1496
CAT No:
ALL-MON-2166
Keywords: Montelukast (3S)-Hydroxy Methylketone, 1...
Inventory Status:In Stock-932-103
-Hydroxy Propanol.png)
Montelukast (3S)-Hydroxy Propanol
Chemical Name: (S)-2-(2-(3-(2-(7-Chloro-2-quinolinyl)-e...
CAS No:
287930-77-2
Molecular Formula: C29H28ClNO2
Molecular Weight: 457.99
CAT No:
ALL-MON-2167
Keywords: Montelukast (3S)-Hydroxy Propanol, (S)-2...
Inventory Status:In Stock-933-103
-Hydroxy Metabolite.png)
Montelukast (R)-Hydroxy Metabolite
Chemical Name: 1-[[[(1R)-1-[3-[(1E)-2-(7-Chloro-2-quino...
CAS No:
184763-26-6
Molecular Formula: C35H36ClNO4S
Molecular Weight: 602.18
CAT No:
ALL-MON-2168
Keywords: Montelukast (R)-Hydroxy Metabolite, 1-[[...
Inventory Status:In Stock-934-103
-Hydroxy Metabolite.png)
Montelukast (S)-Hydroxy Metabolite
Chemical Name: 1-[[[(1R)-1-[3-[(1E)-2-(7-Chloro-2-quino...
CAS No:
184763-29-9
Molecular Formula: C35H36ClNO4S
Molecular Weight: 602.18
CAT No:
ALL-MON-2169
Keywords: Montelukast (S)-Hydroxy Metabolite, 1-[[...
Inventory Status:In Stock-935-103
Montelukast 1,2-Diol / Montelukast 1,2-Diol (Mixture of Diastereomers)
Chemical Name: 2-Hydroxy Montelukast ;1-[1-[[[(1R)-1-[3...
CAS No:
186352-97-6
Molecular Formula: C35H36ClNO4S
Molecular Weight: 602.18
CAT No:
ALL-MON-2170
Keywords: Montelukast 1,2-Diol / Montelukast 1,2-D...
Inventory Status:In Stock-936-103
Montelukast 3-Oxo Benzoate
Chemical Name: 2-[3-[3-[2-(7-Chloro-2-quinolinyl)etheny...
CAS No:
149968-11-6
Molecular Formula: C28H22ClNO3
Molecular Weight: 455.93
CAT No:
ALL-MON-2171
Keywords: Montelukast 3-Oxo Benzoate, 2-[3-[3-[2-(...
Inventory Status:In Stock-937-103
Montelukast Acid
Chemical Name: (R-(E))-1-(((1-(3-(2-(7-Chloro-2-quinoli...
CAS No:
158966-92-8
Molecular Formula: C35H36ClNO3S
Molecular Weight: 586.18
CAT No:
ALL-MON-2172
Keywords: Montelukast Acid, (R-(E))-1-(((1-(3-(2-(...
Inventory Status:In Stock-938-103
Montelukast Acid Methyl Ester / Montelukast Methyl Ester
Chemical Name: 1-[[[1-[3-[(1E)-2-(7-Chloro-2-quinolinyl...
CAS No:
NA
Molecular Formula: C36H38ClNO3S
Molecular Weight: 600.21
CAT No:
ALL-MON-2173
Keywords: Montelukast Acid Methyl Ester / Monteluk...
Inventory Status:In Stock-939-103
Montelukast Acid Methyl Ester Methyl Ether
Chemical Name: 1-[[[(1R)-1-[3-[(1E)-2-(7-Chloro-2-quino...
CAS No:
NA
Molecular Formula: C37H40ClNO3S
Molecular Weight: 614.24
CAT No:
ALL-MON-2174
Keywords: Montelukast Acid Methyl Ester Methyl Eth...
Inventory Status:In Stock-940-103
Montelukast Acid Racemate
Chemical Name: 1-[[[(1RS)-1-[3-[(1E)-2-(7-Chloro-2-quin...
CAS No:
NA
Molecular Formula: C35H36ClNO3S
Molecular Weight: 586.18
CAT No:
ALL-MON-2175
Keywords: Montelukast Acid Racemate, 1-[[[(1RS)-1-...
Inventory Status:In Stock-942-103
Montelukast Amide
Chemical Name: 1-[[[(1R)-1-[3-[(1E)-2-(7-Chloro-2-quino...
CAS No:
866923-63-9
Molecular Formula: C35H37ClN2O2S
Molecular Weight: 585.2
CAT No:
ALL-MON-2177
Keywords: Montelukast Amide, 1-[[[(1R)-1-[3-[(1E)-...
Inventory Status:In Stock-943-103
Montelukast Dicarboxylic Acid Disodium Salt / Montelukast Dicarboxylic Acid (Mixture of Diastereomers)
Chemical Name: 2-[(3R)-3-[[[1-(Carboxymethyl)cyclopropy...
CAS No:
213380-27-9 (Diacid)
Molecular Formula: C35H32ClNNa2O5S
Molecular Weight: 660.13
CAT No:
ALL-MON-2178
Keywords: Montelukast Dicarboxylic Acid Disodium S...
Inventory Status:In Stock-944-103
Montelukast Dicyclohexylamine / Montelukast DCHA
Chemical Name: 1-[1-[[[(1R)-1-[3-[(1E)-2-(7-Chloro-2-qu...
CAS No:
577953-88-9
Molecular Formula: C47H59ClN2O3S
Molecular Weight: 767.5
CAT No:
ALL-MON-2179
Keywords: Montelukast Dicyclohexylamine / Monteluk...
Inventory Status:In Stock-945-103
Montelukast Dihydro Acid / Dihydro Montelukast (Acid)
Chemical Name: 1-[[[(1R)-1-[3-[2-(7-Chloro-2-quinolinyl...
CAS No:
142147-98-6 (sodium salt)
Molecular Formula: C35H38ClNO3S
Molecular Weight: 588.2
CAT No:
ALL-MON-2180
Keywords: Montelukast Dihydro Acid / Dihydro Monte...
Inventory Status:In Stock-946-103
Montelukast Disulfide Diacid Impurity / Montelukast Disulfide Impurity
Chemical Name: 2-(1-((2-((1-Carboxymethylcyclopropyl)me...
CAS No:
162515-67-5
Molecular Formula: C12H18O4S2
Molecular Weight: 290.4
CAT No:
ALL-MON-2181
Keywords: Montelukast Disulfide Diacid Impurity / ...
Inventory Status:In Stock-947-103
Montelukast Disulfide Dimethyl Ester
Chemical Name: Methyl 2-(1-((2-((1-methoxycarbonylmethy...
CAS No:
1446481-28-2
Molecular Formula: C14H22O4S2
Molecular Weight: 318.45
CAT No:
ALL-MON-2182
Keywords: Montelukast Disulfide Dimethyl Ester, Me...
Inventory Status:In Stock-948-103
Montelukast EP Impurity A | Montelukast S-Isomer
Chemical Name: 1-[[[(1S)-1-[3-[(1E)-2-(7-Chloro-2-quino...
CAS No:
190078-45-6 (Na salt)/ 220927-27-5 (Acid)
Molecular Formula: C35H35ClNNaO3S (Na salt) | C35H36ClNO3S (Free Base)
Molecular Weight: 608.17 (Na Salt) | 586.18 (Free Base)
CAT No:
ALL-MON-A2
Keywords: Montelukast EP Impurity A
Inventory Status:In Stock-949-103
Montelukast EP Impurity B | Montelukast USP Related Compound F
Chemical Name: [1-[[[(1R)-1-[3-[(E)-2-(7-Chloroquinolin...
CAS No:
918972-54-0
Molecular Formula: C35H34ClNO2S
Molecular Weight: 568.17
CAT No:
ALL-M03689
Keywords: Montelukast EP Impurity B / Montelukast ...
Inventory Status:In Stock-950-103
Montelukast EP Impurity C | Montelukast USP Related Compound A
Chemical Name: [1-[[[1-[3-[(E)-2-(7-chloroquinolin-2-yl...
CAS No:
909849-96-3
Molecular Formula: C35H36ClNO4S
Molecular Weight: 602.18
CAT No:
ALL-M03690
Keywords: Montelukast EP Impurity C / Montelukast ...
Inventory Status:In Stock-951-103
Montelukast EP Impurity D | Montelukast USP Related Compound C
Chemical Name: 1-[[[(1R)-1-[3-[(1R)-1-[[[1-(Carboxymeth...
CAS No:
1187586-61-3
Molecular Formula: C41H46ClNO5S2
Molecular Weight: 732.39
CAT No:
ALL-MON-D
Keywords: Montelukast EP Impurity D / Montelukast ...
Inventory Status:In Stock-952-103
Montelukast EP Impurity E / Montelukast USP Related Compound D / Michael Adduct (R,S)-Isomer
Chemical Name: 1-[[[(1R)-1-[3-[(1S)-1-[[[1-(Carboxymeth...
CAS No:
1187586-58-8
Molecular Formula: C41H46ClNO5S2
Molecular Weight: 732.39
CAT No:
ALL-MON-E
Keywords: Montelukast EP Impurity E / Montelukast ...
Inventory Status:In Stock-953-103
Montelukast EP Impurity F | Montelukast USP Related Compound E
Chemical Name: [1-[[[(1R)-3-(2-acetylphenyl)-1-[3-[(E)-...
CAS No:
937275-23-5
Molecular Formula: C34H32ClNO3S
Molecular Weight: 570.14
CAT No:
ALL-MON-F
Keywords: Montelukast EP Impurity F / Montelukast ...
Inventory Status:In Stock-954-103
Montelukast EP Impurity G | Montelukast USP Related Compound B
Chemical Name: [1-[[[(1R)-1-[3-[(Z)-2-(7-Chloroquinolin...
CAS No:
774538-96-4
Molecular Formula: C35H36ClNO3S
Molecular Weight: 586.18
CAT No:
ALL-M02881
Keywords: Montelukast EP Impurity G / Montelukast ...
Inventory Status:In Stock-955-103
Montelukast EP Impurity H
Chemical Name: 2-[1-[[[(1R)-1-[3-[(1E)-2-(7-Chloroquino...
CAS No:
851755-56-1 (Base)/906107-37-7 (HCl)
Molecular Formula: C34H32ClNO4S
Molecular Weight: 586.14
CAT No:
ALL-MON-2190
Keywords: Montelukast EP Impurity H / Montelukast ...
Inventory Status:In Stock-956-103
Montelukast EP Impurity I
Chemical Name: (2RS)-[1-[[[(1R)-1-[3-[(1E)-2-(7-Chloro-...
CAS No:
NA
Molecular Formula: C35H36ClNO4S
Molecular Weight: 602.18
CAT No:
ALL-MON-2191
Keywords: Montelukast EP Impurity I / Montelukast ...
Inventory Status:In Stock-957-103
Montelukast Ether Impurity
Chemical Name: 7-Chloro-2-[2-[3-(1,3,4,5-tetrahydro-1,1...
CAS No:
168214-67-3
Molecular Formula: C29H26ClNO
Molecular Weight: 439.98
CAT No:
ALL-MON-2192
Keywords: Montelukast Ether Impurity, 7-Chloro-2-[...
Inventory Status:In Stock-958-103
Montelukast Ketocarbinol Impurity | Montelukast Hydroxymethylcarbonyl Analog
Chemical Name: 1-[[[(1R)-1-[3-[(1E)-2-(7-Chloro-2-quino...
CAS No:
NA
Molecular Formula: C34H32ClNO4S
Molecular Weight: 586.14
CAT No:
ALL-MON-2193
Keywords: Montelukast Ketocarbinol Impurity / Mont...
Inventory Status:In Stock-959-103
.png)
Montelukast Ketone Impurity (USP) | Montelukast 3-Oxo Propanol Impurity
Chemical Name: (E)-1-{3-[2-(7-Chloroquinolin-2-yl)vinyl...
CAS No:
1258428-71-5
Molecular Formula: C29H26ClNO2
Molecular Weight: 455.98
CAT No:
ALL-MON-2194
Keywords: Montelukast Ketone Impurity (USP) / Mont...
Inventory Status:In Stock-960-103
Montelukast Lactone
Chemical Name: (3S)-3-[3-[(1E)-2-(7-Chloro-2-quinolinyl...
CAS No:
1100617-38-6
Molecular Formula: C27H20ClNO2
Molecular Weight: 425.91
CAT No:
ALL-MON-2195
Keywords: Montelukast Lactone, (3S)-3-[3-[(1E)-2-(...
Inventory Status:In Stock-961-103
Montelukast Mercapto Acid Impurity / 3-(Mercaptomethyl)cyclopropane acetic acid
Chemical Name: 2-[1-(Mercaptomethyl)cyclopropyl]acetic ...
CAS No:
162515-68-6
Molecular Formula: C6H10O2S
Molecular Weight: 146.21
CAT No:
ALL-MON-2196
Keywords: Montelukast Mercapto Acid Impurity / 3-(...
Inventory Status:In Stock-962-103
Montelukast Methoxymethoxy Impurity
Chemical Name: 1-[[[(1R)-1-[3-[(1E)-2-(7-Chloro-2-quino...
CAS No:
184764-27-0
Molecular Formula: C37H40ClNO5S
Molecular Weight: 646.24
CAT No:
ALL-MON-2197
Keywords: Montelukast Methoxymethoxy Impurity, 1-[...
Inventory Status:In Stock-964-103
Montelukast Methyl Ether
Chemical Name: 1-[[[(1R)-1-[3-[(1E)-2-(7-Chloro-2-quino...
CAS No:
1351973-25-5
Molecular Formula: C36H38ClNO3S
Molecular Weight: 600.21
CAT No:
ALL-MON-2198
Keywords: Montelukast Methyl Ether, 1-[[[(1R)-1-[3...
Inventory Status:In Stock-965-103
Montelukast Nitrile Impurity
Chemical Name: 1-[[[(1R)-1-[3-[(1E)-2-(7-Chloro-2-quino...
CAS No:
866923-62-8
Molecular Formula: C35H35ClN2OS
Molecular Weight: 567.18
CAT No:
ALL-MON-2199
Keywords: Montelukast Nitrile Impurity, 1-[[[(1R)-...
Inventory Status:In Stock-966-103
Montelukast Sodium
Chemical Name: 2-[1-[[(1R)-1-[3-[2-[(7-chloro-2-quinoly...
CAS No:
151767-02-1
Molecular Formula: C35H35ClNNaO3S
Molecular Weight: 608.17
CAT No:
ALL-MON-2200
Keywords: Montelukast Sodium, 2-[1-[[(1R)-1-[3-[2-...
Inventory Status:In Stock-967-103
Montelukast Sulfone
Chemical Name: 1-[[[1-[3-[2-(7-Chloro-2-quinolinyl)ethe...
CAS No:
1266620-74-9
Molecular Formula: C35H36ClNO5S
Molecular Weight: 618.18
CAT No:
ALL-MON-2201
Keywords: Montelukast Sulfone, 1-[[[1-[3-[2-(7-Chl...
Inventory Status:In Stock-968-103