Linezolid Impurity 79 CAS 874340-08-6
| CAS No. | 874340-08-6 |
| Molecular Formula | C21H22FN3O4 |
| Molecular Weight | 399.42 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 Linezolid Impurity 79 (CAS 874340-08-6), a pharmacopoeial impurity reference standard (molecular formula C21H22FN3O4, MW 399.42 g/mol) used for the identification and quantification of trace impurities in APIs.
Structurally, Linezolid Impurity 79 (C21H22FN3O4) contains a flavonoid core, an amide group, a hydroxyl group, an ether linkage, fluorine substitution. The molecule exhibits a degree of unsaturation (DBE) of 12.0, corresponding to approximately 12 ring(s) or double-bond equivalent(s). With a molecular weight of 399.42 g/mol, it falls into the moderately-high-molecular-weight range. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
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.
Physical & Chemical Properties
| Molecular Formula | C21H22FN3O4 |
| Molecular Weight | 399.42 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor) |
| Purity | >95% |
| Storage | Store at 2-8°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) | 12.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1987 |
| Halogen Content | F-containing |
| Nitrogen Atoms | 3 |
Related Linezolid Standards
- Linezolid Impurity 72 (CAS 2512195-95-6)
- Linezolid Impurity 91 (CAS CATO-C4X-107391)
- Linezolid Impurity 12 (CAS 1215006-11-3)
- Linezolid impurity 105 (CAS 556801-12-8)
- Linezolid Impurity 27 (CAS CATO-C4X-107327)
- Linezolid Impurity 89 (CAS CATO-C4X-107389)
- Linezolid Impurity 90 (CAS CATO-C4X-107390)
- Linezolid Impurity 31 (CAS CATO-C4X-107331)
Recommended Standards
- Moxifloxacin Impurity 47 (CAS 2315304-27-7)
- Trelagliptin Impurity 20 (CAS 1821520-42-6)
- Moxifloxacin Impurity 62 (CAS CATO-C4X-107462)
- N-(7-(furan-2-carbonyl)-2,3-dihydrobenzo[b][1,4]dioxin-6-yl)-4-methylbenzenesulfonamide (CAS 886493-74-9)
- Tucatinib Impurity 52 (CAS CATO-C4X-260552)
- Selexipag Impurity 14 (CAS CATO-C4X-196129)
- Baclofen Impurity 70 (CAS CATO-C4X-101270)
- 3-Bromo-1H-pyrrolo[3,2-c]pyridin-6-ol (CAS 1190320-24-1)
- 2-Amino-1,4-dihydroisoquinolin-3(2H)-one (CAS 39113-02-5)
- 3-(5-Methylfuran-2-yl)-1-phenyl-1H-pyrazole-4-carbaldehyde (CAS 210825-08-4)
- 2,6-Diphenyl-4-(3-(trifluoromethyl)phenyl)-4H-1,3,5-thiadiazine (CAS 400078-36-6)
- 4-(Trifluoromethyl)benzyl 4-(1H-indol-3-yl)butanoate (CAS 860784-04-9)
- 5-Methyl-3'-(pyrrolidin-1-ylsulfonyl)-[1,1'-biphenyl]-3-ol (CAS 1261960-87-5)
- Semaglutide impurity 40 (CAS CATO-C4X-222640)
Why CATO?
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- 130,000+ catalog items in stock, COA supplied with every batch
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- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com