Loxoprofen Impurity 161 CAS CATO-C4X-1488161
| CAS No. | CATO-C4X-1488161 |
| Molecular Formula | C18H24O3 |
| Molecular Weight | 288.38 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
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 supplies Loxoprofen Impurity 161 (CAS CATO-C4X-1488161), a pharmacopoeial impurity reference standard (molecular formula C18H24O3, MW 288.38 g/mol) used for the identification and quantification of trace impurities in APIs.
Loxoprofen Impurity 161 (C18H24O3) contains a steroid core, a hydroxyl group, an ether linkage. Its high carbon-to-hydrogen ratio confers good lipid solubility, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. The high carbon-to-hydrogen ratio imparts good lipophilicity, allowing liquid-liquid extraction with non-polar solvents such as n-hexane or ethyl acetate.
As a certified reference material (CRM), Loxoprofen Impurity 161 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 | C18H24O3 |
| Molecular Weight | 288.38 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 chloroform, dichloromethane, ethyl acetate, DMSO |
| 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 109 (CAS CATO-C4X-1488109)
- Loxoprofen Impurity 88 (CAS 1616730-60-9)
- Loxoprofen Impurity 4 (CAS CATO-C4X-14884)
- Loxoprofen Impurity 3 (CAS 1091621-61-2)
- Loxoprofen Impurity 32 (CAS 2514697-36-8)
- Loxoprofen Impurity 159 (CAS CATO-C4X-1488159)
- Loxoprofen Impurity 66 (CAS 334948-52-6)
- Loxoprofen impurity 85 (CAS 335096-46-3)
Recommended Standards
- Glycopyrrolate Impurity 20 (CAS CATO-C4X-143120)
- Estradiol Impurity 10 (CAS 1229-24-9)
- Flunarizine Impurity 21 (CAS 39918-90-6)
- Estradiol Impurity 11 (CAS 3583-03-7)
- Remdesivir Impurity 10 (CAS 1911578-73-8)
- Brexpiprazole Impurity 55 (CAS CATO-C4X-113155)
- Candesartan Cilexetil Impurity 39 (CAS CATO-C4X-123439)
- 3-Bromo-2,6-dimethoxypyridine (CAS 13445-16-4)
- 6-Methyl-5-(1-propylpiperidin-2-yl)pyridin-2(1H)-one (CAS 1352504-24-5)
- 2,6-Dichloro-4-methylpyridine (CAS 39621-00-6)
- (15Z)-15-Tetracosenoic Acid 2,5-Dioxo-1-pyrrolidinyl Ester 1-[[(15Z)-1-Oxo-15-tetracosenyl]oxy]-2,5-pyrrolidinedione 191354-88-8 Succinimidyl Nervonate (CAS 191354-88-8)
- N-(4-Methoxyphenyl)-2-(4-nitrophenoxy)acetamide (CAS 303795-97-3)
- 7-Methoxy-[1,2,4]triazolo[4,3-a]pyridine (CAS 1890781-90-4)
- Semaglutide impurity 44 (CAS CATO-C4X-222644)
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