Betamethasone Impurity 142 CAS CATO-C4X-1437142
| CAS No. | CATO-C4X-1437142 |
| Molecular Formula | C44H57F2O12P |
| Molecular Weight | 846.89 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Betamethasone Impurity 142 (CAS CATO-C4X-1437142) is a certified pharmaceutical impurity reference standard with the molecular formula C44H57F2O12P and a molecular weight of 846.89 g/mol.
Based on its molecular formula C44H57F2O12P, Betamethasone Impurity 142 contains a phosphate ester group, a carboxylic acid group, a hydroxyl group, an ether linkage, fluorine substitution, a polycyclic aromatic system; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 846.89 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
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), Betamethasone Impurity 142 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 | C44H57F2O12P |
| Molecular Weight | 846.89 g/mol |
| Purity | 97%+ |
| Storage | Store at room temperature, 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; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 15.5 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Halogen Content | F-containing |
Related Betamethasone Standards
- Betamethasone Impurity 119 (CAS CATO-C4X-1437119)
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Recommended Standards
- Phallacidin (CAS 26645-35-2)
- Dexamethasone Phosphate Diester (CAS CATO-C4X-116556)
- Sucrose Diacetate Hexaisobutyrate (1 mL) (CAS 126-13-6)
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- Sitagliptin Impurity 26 (CAS 1402569-71-4)
- Isavuconazole Impurity 105 (CAS CATO-C4X-1236105)
- GST-HG171 Impurity 8 (CAS CATO-C4X-30608)
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