Loxoprofen Impurity 44 CAS 1152440-23-7
| CAS No. | 1152440-23-7 |
| Molecular Formula | C19H24O5 |
| Molecular Weight | 332.39 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including Loxoprofen Impurity 44.
Loxoprofen Impurity 44 (CAS 1152440-23-7) is a certified pharmaceutical impurity reference standard with the molecular formula C19H24O5 and a molecular weight of 332.39 g/mol.
Loxoprofen Impurity 44 (C19H24O5) contains a flavonoid core, a hydroxyl group, an ether linkage. The carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
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), Loxoprofen Impurity 44 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 | C19H24O5 |
| Molecular Weight | 332.39 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) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1989 |
Related Loxoprofen Standards
- Loxoprofen Impurity 54 (CAS CATO-C4X-148854)
- Loxoprofen impurity 115 (CAS CATO-C4X-1488115)
- Loxoprofen impurity 136 (CAS CATO-C4X-1488136)
- Loxoprofen impurity 100 (CAS CATO-C4X-1488100)
- Loxoprofen Impurity 79 (CAS CATO-C4X-148879)
- Loxoprofen Impurity 80 (CAS CATO-C4X-148880)
- Loxoprofen impurity 127 (CAS CATO-C4X-1488127)
- Loxoprofen impurity 125 (CAS CATO-C4X-1488125)
Recommended Standards
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- Baloxavir impurity 85 (CAS 2708125-86-2)
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- 2-Fluoro-3-iodobenzaldehyde (CAS 146137-83-9)
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