Formoterol impurity 35 CAS CATO-C4X-1525135
| CAS No. | CATO-C4X-1525135 |
| Molecular Formula | C16H18BrNO |
| Molecular Weight | 320.22 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
As a process- or degradation-related impurity, Formoterol impurity 35 (CAS CATO-C4X-1525135, C16H18BrNO) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
Formoterol impurity 35 (C16H18BrNO) contains a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage, bromine substitution. Halogen substitution raises its density and boiling point, its high carbon-to-hydrogen ratio confers good lipid solubility; these physicochemical properties determine the optimal preparation and storage of its standard solutions. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
This reference standard supports related-substances testing and method development in line with ICH Q3A/Q3B guidance on impurity control, and is suitable for system suitability testing and forced-degradation studies.
As a certified reference material (CRM), Formoterol impurity 35 meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
Physical & Chemical Properties
| Molecular Formula | C16H18BrNO |
| Molecular Weight | 320.22 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Halogen Content | Br-containing |
| Nitrogen Atoms | 1 |
Related Formoterol Standards
- Formoterol Impurity 102 (CAS 1823724-70-4)
- Formoterol Impurity 56 (CAS 333796-54-6)
- Formoterol EP Impurity A (CAS 150513-24-9)
- Formoterol Impurity 47 (CAS 245759-66-4)
- Formoterol Impurity 50 (CAS 245759-62-0)
- Formoterol impurity 132 (CAS CATO-C4X-1525132)
- Formoterol Impurity 42 (CAS CATO-C4X-152542)
- Formoterol Impurity 75 (CAS CATO-C4X-152575)
Recommended Standards
- Tert-butyl 4-(3-bromo-2-oxopropyl)piperidine-1-carboxylate (CAS 473795-43-6)
- 6-Bromo-2,8-dimethyl-4-(piperazin-1-yl)quinoline (CAS 1333308-42-1)
- tert-butyl 3-bromo-1-oxa-8-azaspiro[4.5]decane-8-carboxylate (CAS 898157-46-5)
- 2-(9,9-Dimethyl-9H-fluoren-3-yl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane (CAS 1346007-02-0)
- Terbutaline Impurity 80 (CAS CATO-C4X-118380)
- Lenalidomide Impurity 20 (CAS 62621-09-4)
- Tofacitinib Impurity 233 (CAS CATO-C4X-1079233)
- Methyl 2-bromo-7-hydroxybenzo[b]thiophene-6-carboxylate (CAS 2168292-55-3)
- 2-((4-Amino-5-(4-methylphenyl)-4H-1,2,4-triazol-3-yl)thio)acetamide (CAS 667879-44-9)
- 4-(aminomethyl)-1-methylpiperidin-2-one dihydrochloride (CAS 1909336-47-5)
- 3-Fluoro-4-(4-pyridyl)benzoic Acid (CAS 1214359-83-7)
- N-(4-bromo-2-fluorophenyl)-5-methylisoxazole-3-carboxamide (CAS 916037-08-6)
- (2S,4S)-1-(Tert-butoxycarbonyl)-4-(methoxymethyl)pyrrolidine-2-carboxylic acid (CAS 1378388-16-9)
- Fibrinogen-Binding Peptide (CAS 137235-80-4)
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