Loxoprofen Impurity 42 CAS CATO-C4X-148842
| CAS No. | CATO-C4X-148842 |
| Molecular Formula | C18H24O5 |
| Molecular Weight | 320.38 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Loxoprofen Impurity 42 (CAS CATO-C4X-148842) is a certified pharmaceutical impurity reference standard with the molecular formula C18H24O5 and a molecular weight of 320.38 g/mol.
Owing to a flavonoid core, a hydroxyl group, an ether linkage, Loxoprofen Impurity 42 is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 320.38 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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).
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.
The assigned purity is verified by mass-balance and quantitative NMR (qNMR) approaches, with the expanded uncertainty reported at a 95% confidence level (k=2). Batch homogeneity and stability are independently assessed for every lot.
Physical & Chemical Properties
| Molecular Formula | C18H24O5 |
| Molecular Weight | 320.38 g/mol |
| Appearance | Off-white to pale 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) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
Related Loxoprofen Standards
- Loxoprofen Impurity 137 (CAS CATO-C4X-1488137)
- 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 86 (CAS CATO-C4X-148886)
- Loxoprofen impurity 87 (CAS CATO-C4X-148887)
Recommended Standards
- Loxoprofen impurity 98 (CAS CATO-C4X-148898)
- Loxoprofen impurity 99 (CAS 221017-01-2)
- Raloxifene Impurity 20 (CAS 182133-38-6)
- Raloxifene Impurity 24 (CAS CATO-C4X-174324)
- Indocyanine Green Impurity 64 (CAS 1351043-94-1)
- Sitafloxacin Impurity 19 (CAS CATO-C4X-115519)
- Peramivir Impurity 49 HCl (CAS 229614-17-9)
- 5-Amino-1,4,6-trimethyl-2-oxo-1,2-dihydropyridine-3-carboxamide (CAS 1268334-81-1)
- 4＇-Bromo-2＇-fluoroacetanilide (CAS 326-66-9)
- 4-(5-Chloro-1-(3-methoxypropyl)-1H-benzo[d]imidazol-2-yl)butanoic acid (CAS 1437435-51-2)
- (R)-2-((o-Tolyloxy)methyl)morpholine hydrochloride (CAS 56324-45-9)
- 3-Fluoro-4-((1-methyl-1H-pyrazol-3-yl)methoxy)aniline (CAS 1260659-03-7)
- 2-(4-methylphenyl)ethene-1-sulfonyl fluoride (CAS 1819971-30-6)
- Semaglutide impurity 25 (CAS CATO-C4X-222625)
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