Formoterol Impurity 41 CAS 51582-41-3
| CAS No. | 51582-41-3 |
| Molecular Formula | C15H13NO4 |
| Molecular Weight | 271.27 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 271.27 g/mol gives Formoterol Impurity 41 distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
Formoterol Impurity 41 (CAS 51582-41-3) is a certified pharmaceutical impurity reference standard with the molecular formula C15H13NO4 and a molecular weight of 271.27 g/mol.
Owing to a flavonoid core, an amide group, a hydroxyl group, an ether linkage, Formoterol Impurity 41 is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 271.27 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
Recommended for quantitative analysis by HPLC, GC, LC-MS/MS, or GC-MS as an external calibration standard; it can also be used for spiked-recovery experiments, LOD/LOQ determination, and LC-MS/MS multiple-reaction-monitoring (MRM) calibration.
As a certified reference material (CRM), Formoterol Impurity 41 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 | C15H13NO4 |
| Molecular Weight | 271.27 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 10.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1971 |
| Nitrogen Atoms | 1 |
Related Formoterol Standards
- Formoterol Impurity 119 (CAS CATO-C4X-1525119)
- Formoterol impurity 105 (CAS CATO-C4X-1525105)
- Formoterol Impurity 118 (CAS CATO-C4X-1525118)
- Formoterol Impurity 28 (CAS 126587-86-8)
- Formoterol Impurity 20 (CAS CATO-C4X-152520)
- Formoterol Impurity 96 (CAS 5029-61-8)
- Formoterol Impurity 58 (CAS CATO-C4X-152558)
- Formoterol Impurity 104 (CAS CATO-C4X-1525104)
Recommended Standards
- 1-[3-nitro-4-(phenylmethoxy)phenyl]ethanone (CAS 14347-05-8)
- Neratinib Impurity 40 (CAS 848133-75-5)
- Ketorolac Impurity 22 (CAS CATO-C4X-166922)
- Sorafenib EP Impurity B (CAS 2004659-84-9)
- Ketoconazole Impurity 13 (and enantiomer) (CAS 61397-58-8)
- Duvelisib (CAS CATO-C4X-29801)
- Torasemide Impurity 43 (CAS CATO-C4X-183643)
- Methyl (4-methoxy-3-(2-oxopyrrolidin-1-yl)phenyl)carbamate (CAS 922977-84-2)
- (3-Amino-4-methoxyphenyl)(4-isopropylphenyl)methanone (CAS 1176617-23-4)
- (S)-tert-butyl 3-((S)-2-(((benzyloxy)carbonyl)amino)propanamido)-4-oxo-5-(2,3,5,6-tetrafluorophenoxy)pentanoate (CAS 868565-57-5)
- 3-methyl-5-(4-methylpiperazin-1-yl)aniline (CAS 1283736-97-9)
- 1-{[3-(4-Methylphenyl)-1,2,4-oxadiazol-5-yl]methyl}-1,4-diazepane (CAS 1094668-16-2)
- 3-(3-(Furan-3-yl)-1,2,4-oxadiazol-5-yl)propan-1-amine (CAS 1339360-81-4)
- Semaglutide impurity 98 (CAS CATO-C4X-222698)
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