Clearsynth is a leading innovator in pharmaceutical reference standards, offering high-quality Reference Standards for Montelukast, including both pharmacopeial and non-pharmacopeial impurities, metabolites, stable isotope products, and nitrosamines (N-NO products). Our Montelukast impurity reference standards are invaluable for pharmaceutical research, supporting product development, ANDA and DMF submissions, quality control (QC), method validation, and stability studies. They also aid in identifying unknown impurities and assessing genotoxic potential.
Our Montelukast-related products undergo thorough characterization and are supplied with detailed Certificates of Analysis (COA) and analytical data that meet regulatory requirements. All supplied products are re-tested at regular intervals to ensure ongoing quality and compliance.
Our Montelukast-related products undergo thorough characterization and are supplied with detailed Certificates of Analysis (COA) and analytical data that meet regulatory requirements. All supplied products are re-tested at regular intervals to ensure ongoing quality and compliance.
Montelukast Related Compounds
Stable Isotopes
| COMPOUND | CATEGORY | CAT. No. | CAS. No. | STOCK STATUS |
|---|---|---|---|---|
| 2,2-Dimethoxy-d6 Montelukast | Stable Isotopes | CS-T-97579 | Not Available | Enquire |
| 21(R)-Hydroxy Montelukast-d6 | Stable Isotopes | CS-T-97419 | 184763-26-6(Unlabelled) | Enquire |
| 21(S)-Hydroxy Montelukast-d6 | Stable Isotopes | CS-T-97418 | Not Available | Enquire |
| Methoxy-d3 Montelukast | Stable Isotopes | CS-T-97319 | Not Available | Enquire |
| Methoxy-d3 Montelukast Methyl Ester-d3 | Stable Isotopes | CS-T-102722 | Not Available | Enquire |
| Montelukast Acyl-b-D-glucuronide-d6 | Stable Isotopes | CS-T-102203 | Not Available | Enquire |
| Montelukast Cyclized Ether impurity-d6 | Stable Isotopes | CS-T-99149 | Not Available | Enquire |
| Montelukast Cyclopropaneacetamide-d6 (Impurity) | Stable Isotopes | CS-T-99151 | Not Available | Enquire |
| Montelukast Cyclopropaneacetonitrile-d6 | Stable Isotopes | CS-T-97276 | Not Available | Enquire |
| Montelukast-d6 | Stable Isotopes | CS-O-06791 | 1093746-29-2 | Enquire |
| Montelukast-d6 Bis-sulfide (mixture of diastereomers) | Stable Isotopes | CS-T-99150 | Not Available | Enquire |
| Montelukast-d6 Sodium | Stable Isotopes | CS-O-03176 | 2673270-26-1 | In Stock |
API Standards
| COMPOUND | CATEGORY | CAT. No. | CAS. No. | STOCK STATUS |
|---|---|---|---|---|
| Montelukast | API Standards | CS-O-01846 | 158966-92-8 | In Stock |
| Montelukast Potassium | API Standards | CS-EO-03707 | 577953-87-8 | Enquire |
| Montelukast racemate | API Standards | CS-O-48156 | Not Available | Enquire |
| Montelukast Sodium | API Standards | CS-O-01855 | 151767-02-1 | In Stock |
Impurities
| COMPOUND | CATEGORY | CAT. No. | CAS. No. | STOCK STATUS |
|---|---|---|---|---|
| (S) Montelukast | Impurities | CS-O-05738 | 220927-27-5 | In Stock |
| 2-(3(S)-(3-(2-(7-chloro-2-quinolinyl)ethenyl)phenyl)-3- hydr... | Impurities | CS-O-45557 | 144551-23-5 | Enquire |
| 2’-Des(1-hydroxy-1-methylethyl)-2’-methycarboxy Montelukast ... | Impurities | CS-T-16010 | 906107-37-7 | Enquire |
| 2-Methoxymethyl Montelukast 1,2-Diol | Impurities | CS-T-32555 | 184764-27-0 | Enquire |
| Cyclopropane-1,1- diylbis(methylene) dimethanesulfonate | Impurities | CS-O-40933 | 136476-38-5 | In Stock |
| Des[3-[[(1-Carboxymethyl)cyclopropyl]methyl]thio]-2-propenyl... | Impurities | CS-T-52113 | 1187586-82-8 | Enquire |
| Dihydro Montelukast Sodium Salt | Impurities | CS-O-33060 | 142147-98-6 | Enquire |
| Dihydro Montelukast Sodium Salt | Impurities | CS-T-53076 | 142147-98-6 | In Stock |
| ent-Montelukast Sodium Salt | Impurities | CS-T-82793 | 190078-45-6 | Enquire |
| Montelukast (3R)-Hydroxy Benzoate | Impurities | CS-O-07942 | 150026-72-5 | In Stock |
| Montelukast (3R)-Hydroxy Propanol | Impurities | CS-EO-02223 | 142542-48-1 | Enquire |
| Montelukast (3S)-hydroxy propanol | Impurities | CS-T-51001 | 287930-77-2 | Enquire |
| Montelukast 3-Oxo Propanol Impurity | Impurities | CS-O-31224 | 1258428-71-5 | In Stock |
| Montelukast Acid impurity | Impurities | CS-O-47527 | Not Available | Enquire |
| Montelukast Bis-sulfide | Impurities | CS-T-58944 | 1242260-05-4 | Enquire |
| Montelukast Chloroalcohol impurity | Impurities | CS-EO-03095 | 880769-28-8 | Enquire |
| Montelukast Cyclizate Ether impurity | Impurities | CS-T-58953 | 168214-67-3 | Enquire |
| Montelukast cyclopropaneacetamide (Impurity) | Impurities | CS-T-58943 | 866923-63-9 | Enquire |
| Montelukast Cyclopropaneacetonitrile | Impurities | CS-T-58954 | 866923-62-8 | In Stock |
| Montelukast Dehydro Impurity | Impurities | CS-EO-00294 | 168214-68-4 | Enquire |
| Montelukast Dicarboxylic Acid | Impurities | CS-T-58952 | 213380-27-9 | Enquire |
| Montelukast Diol | Impurities | CS-O-32351 | 142569-70-8 | In Stock |
| Montelukast EP impurity A | Impurities | CS-O-07943 | 190078-45-6 | In Stock |
| Montelukast EP Impurity B | Impurities | CS-O-10009 | 918972-54-0 | In Stock |
| Montelukast EP Impurity C (Mixture of isomers) | Impurities | CS-O-10008 | 909849-96-3 | In Stock |
| Montelukast EP Impurity D | Impurities | CS-O-11858 | 1187586-61-3 | In Stock |
| Montelukast EP Impurity D+E (Michael Adduct 1+2) | Impurities | CS-O-34801 | 2125943-58-8 | In Stock |
| Montelukast EP Impurity E | Impurities | CS-O-11859 | 1187586-58-8 | In Stock |
| Montelukast EP Impurity F | Impurities | CS-O-11860 | 937275-23-5 | In Stock |
| Montelukast EP impurity G | Impurities | CS-O-11861 | 774538-96-4 | In Stock |
| Montelukast EP impurity H | Impurities | CS-O-11862 | 851755-56-1 | Enquire |
| Montelukast EP impurity I | Impurities | CS-O-11863 | Not Available | Enquire |
| Montelukast Gem-dimethylmethylene Analogue | Impurities | CS-T-83464 | 162489-70-5 | Enquire |
| Montelukast Ketocarbinol Impurity | Impurities | CS-EO-01049 | Not Available | Enquire |
| Montelukast methanesulfonate IMPURITY | Impurities | CS-O-43280 | 920739-17-9 | Enquire |
| Montelukast Methyl Ester | Impurities | CS-T-58955 | 855473-51-7 | Enquire |
| Montelukast sodium racemate | Impurities | CS-EO-00151 | Not Available | Enquire |
| Montelukast Sulfone | Impurities | CS-T-58950 | 1266620-74-9 | In Stock |
| Montelukast Sulphoxide | Impurities | CS-AB-00066 | 1152185-58-4 | In Stock |
EP Standards
| COMPOUND | CATEGORY | CAT. No. | CAS. No. | STOCK STATUS |
|---|---|---|---|---|
| Montelukast for peak identification (Y0001435) | EP Standards | CS-EG-01686 | 151767-02-1 | Enquire |
Intermediates
| COMPOUND | CATEGORY | CAT. No. | CAS. No. | STOCK STATUS |
|---|---|---|---|---|
| (E)-Montelukast (3R)-hydroxy propanol | Intermediates | CS-T-51002 | 150026-75-8 | Enquire |
| 21(R)-Hydroxy Montelukast | Intermediates | CS-T-56246 | 184763-26-6 | Enquire |
| 21(S)-Hydroxy Montelukast | Intermediates | CS-T-56247 | 184763-29-9 | Enquire |
| 25-Hydroxy Montelukast | Intermediates | CS-T-28037 | 200804-28-0 | Enquire |
| Methoxy Montelukast | Intermediates | CS-T-79803 | 1351973-25-5 | Enquire |
| Montelukast (3S)-Hydroxy benzoate | Intermediates | CS-O-10644 | 142569-69-5 | Enquire |
| Montelukast (3S)-Hydroxy Methylketone | Intermediates | CS-T-50998 | 184764-13-4 | Enquire |
| Montelukast 1,2-Diol | Intermediates | CS-T-58948 | 186352-97-6 | Enquire |
| Montelukast 3-oxo benzoate | Intermediates | CS-T-12520 | 149968-11-6 | Enquire |
Glucuronides
| COMPOUND | CATEGORY | CAT. No. | CAS. No. | STOCK STATUS |
|---|---|---|---|---|
| Montelukast acyl-Beta-D-glucuronide | Glucuronides | CS-O-14559 | 188717-17-1 | Enquire |
Fine Chemicals
| COMPOUND | CATEGORY | CAT. No. | CAS. No. | STOCK STATUS |
|---|---|---|---|---|
| Methyl 2-Iodobenzoate | Fine Chemicals | CS-M-01834 | 610-97-9 | In Stock |
| Montelukast Dicyclohexylamine Salt | Fine Chemicals | CS-T-58945 | 577953-88-9 | In Stock |