Linezolid Impurity 31 CAS CATO-C4X-107331
| CAS No. | CATO-C4X-107331 |
| Molecular Formula | C21H24F2N4O3 |
| Molecular Weight | 418.44 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of Linezolid Impurity 31 is closely related to a steroid core, an amide group, a hydroxyl group, an ether linkage, fluorine substitution in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
Linezolid Impurity 31 (CAS CATO-C4X-107331) is a certified pharmaceutical impurity reference standard with the molecular formula C21H24F2N4O3 and a molecular weight of 418.44 g/mol.
Linezolid Impurity 31 (C21H24F2N4O3) contains a steroid core, an amide group, a hydroxyl group, an ether linkage, fluorine substitution. It is notably hygroscopic, halogen substitution raises its density and boiling point, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. 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.
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 | C21H24F2N4O3 |
| Molecular Weight | 418.44 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor, low volatility) |
| Purity | >95% |
| Storage | Store in a cool place (≤25°C), protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 11.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Halogen Content | F-containing |
| Nitrogen Atoms | 4 |
Related Linezolid Standards
- Linezolid Impurity 26 (CAS 168828-89-5)
- Linezolid Impurity 68 (CAS 947736-16-5)
- Linezolid Impurity 27 (CAS CATO-C4X-107327)
- Linezolid impurity 105 (CAS 556801-12-8)
- Linezolid Impurity 91 (CAS CATO-C4X-107391)
- Linezolid Impurity 93 (CAS CATO-C4X-107393)
- Linezolid Impurity 72 (CAS 2512195-95-6)
- Linezolid Impurity 79 (CAS 874340-08-6)
Recommended Standards
- Cyclomorusin (CAS 62596-34-3)
- Nimodipine Impurity 29 (CAS CATO-C4X-138529)
- Syringaresinol (CAS 487-35-4)
- Nimodipine Impurity 30 (CAS CATO-C4X-138530)
- Budesonide EP Impurity J (Mixture of Diastereomers) (CAS 313474-59-8)
- Melphalan Impurity 28 (CAS CATO-C4X-198828)
- Erlotinib impurity 132 (CAS CATO-C4X-1069132)
- 2-(Dimethylamino)-2-methyl-1-propanol (CAS 7005-47-2)
- 4,5,5-Trimethyl-2-oxo-2,5-dihydrofuran-3-carbonitrile (CAS 13332-71-3)
- 1-Chloro-2-isopropoxy-4-nitrobenzene (CAS 76464-51-2)
- 2-(5-Chloro-2-methoxyphenyl)-2-fluoroacetic acid (CAS 1536254-17-7)
- 2-(4-Bromo-5-methyl-3-indolyl)-2-oxoacetic Acid (CAS 2097800-40-1)
- Methyl 4-Oxocyclohexanecarboxylate (CAS 6297-22-9)
- Semaglutide impurity 57 (CAS 2773558-06-6)
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