Oxazepam impurity 01 CAS 5504-71-2
| CAS No. | 5504-71-2 |
| Molecular Formula | C15H13ClN2O2 |
| Molecular Weight | 288.73 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), Oxazepam impurity 01 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.
CATO supplies Oxazepam impurity 01 (CAS 5504-71-2), a pharmacopoeial impurity reference standard (molecular formula C15H13ClN2O2, MW 288.73 g/mol) used for the identification and quantification of trace impurities in APIs.
Oxazepam impurity 01 (C15H13ClN2O2) contains a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage, chlorine substitution. It is notably hygroscopic, halogen substitution raises its density and boiling point, 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. 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 | C15H13ClN2O2 |
| Molecular Weight | 288.73 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry, keep tightly closed to prevent evaporation |
| 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) | 10.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1958 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 2 |
Related Oxazepam Standards
Recommended Standards
- 7-(1-(4-Chloro-2-methylphenoxy)ethyl)-[1,2,4]triazolo[1,5-a]pyrimidine (CAS 477865-20-6)
- AHR-10037 (CAS 78281-73-9)
- 6-Chloro-3-(1-ethyl-1H-pyrazol-5-yl)-2-methylquinazolin-4(3H)-one (CAS 708212-95-7)
- Ethyl ((5-chlorobenzo[b]thiophen-3-yl)methyl)(methyl)phosphinate (CAS 862094-19-7)
- Pyrantel EP Impurity B (CAS 36700-39-7)
- Crisaborole Impurity 38 (CAS 2254541-79-0)
- Sotalol EP Impurity B HCl (CAS 5576-49-8)
- CYANIDIN-3-O-LATHYROSIDE CHLORIDE (CAS 31073-32-2)
- 1-(4-Chlorobenzyl)-3-phenyl-1-(3,3,3-trifluoro-2-hydroxypropyl)urea (CAS 478258-83-2)
- 6-Morpholinopyridine-3-sulfonyl Chloride Hydrochloride (CAS 1346510-61-9)
- N-{[(1S,5R)-8-Oxo-1,5,6,8-tetrahydro-2H-1,5-methano-pyrido[1,2-a][1,5]diazocin-3(4H)-yl]carbonyl}-L-alanine (CAS 956923-67-4)
- 4-(3-Aminopyrazol-1-yl)-2-methylbutan-2-ol (CAS 1003012-39-2)
- 5-Oxo-5-{3-[(propylamino)carbonyl]-anilino}pentanoic acid (CAS 940458-86-6)
- D-Ser32-Tirzepatide (CAS CATO-CPTD788692)
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