Menaquinone impurity 18 CAS CATO-C4X-207618
| CAS No. | CATO-C4X-207618 |
| Molecular Formula | C33H44O3 |
| Molecular Weight | 488.70 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
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.
CATO supplies Menaquinone impurity 18 (CAS CATO-C4X-207618), a pharmacopoeial impurity reference standard (molecular formula C33H44O3, MW 488.70 g/mol) used for the identification and quantification of trace impurities in APIs.
Based on its molecular formula C33H44O3, Menaquinone impurity 18 contains a carboxylic acid group, a hydroxyl group, an ether linkage, a polycyclic aromatic system; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 488.70 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The high carbon-to-hydrogen ratio imparts good lipophilicity, allowing liquid-liquid extraction with non-polar solvents such as n-hexane or ethyl acetate.
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.
Physical & Chemical Properties
| Molecular Formula | C33H44O3 |
| Molecular Weight | 488.70 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at room temperature, 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) | 12.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
Related Menaquinone Standards
- Menaquinone impurity 21 (CAS CATO-C4X-207621)
- Menaquinone Impurity 47 (CAS CATO-C4X-207647)
- Menaquinone Impurity 44 (CAS CATO-C4X-207644)
- Menaquinone impurity 35 (CAS CATO-C4X-207635)
- Menaquinone 5 (CAS 1182-68-9)
- Menaquinone impurity 22 (CAS CATO-C4X-207622)
- Menaquinone impurity 38 (CAS CATO-C4X-207638)
- Menaquinone impurity 19 (CAS 65061-22-5)
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