Loxoprofen Impurity 137 CAS CATO-C4X-1488137
| CAS No. | CATO-C4X-1488137 |
| Molecular Formula | C18H24O5 |
| Molecular Weight | 320.38 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 137.
CATO supplies Loxoprofen Impurity 137 (CAS CATO-C4X-1488137), a pharmacopoeial impurity reference standard (molecular formula C18H24O5, MW 320.38 g/mol) used for the identification and quantification of trace impurities in APIs.
The molecular framework of Loxoprofen Impurity 137 (C18H24O5) is characterized by a flavonoid core, a hydroxyl group, an ether linkage. In reversed-phase chromatography, its retention is governed primarily by the polarity and ionization state of its functional groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. 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.
CATO manufactures Loxoprofen Impurity 137 under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C18H24O5 |
| Molecular Weight | 320.38 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| Purity | ≥95% |
| 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) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
Related Loxoprofen Standards
- Loxoprofen Impurity 138 (CAS CATO-C4X-1488138)
- Loxoprofen Impurity 139 (CAS CATO-C4X-1488139)
- Loxoprofen Impurity 167 (CAS CATO-C4X-1488167)
- Loxoprofen Impurity 168 (CAS CATO-C4X-1488168)
- Loxoprofen Impurity 40 (CAS CATO-C4X-148840)
- Loxoprofen Impurity 42 (CAS CATO-C4X-148842)
- Loxoprofen impurity 86 (CAS CATO-C4X-148886)
- Loxoprofen impurity 87 (CAS CATO-C4X-148887)
Recommended Standards
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- Rosuvastatin Impurity 108 (CAS 160009-35-8)
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Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com