Oxazepam impurity 6 CAS CATO-C4X-30906
| CAS No. | CATO-C4X-30906 |
| Molecular Formula | C18H16ClN3O2 |
| Molecular Weight | 341.79 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Oxazepam impurity 6 (CAS CATO-C4X-30906) is a certified pharmaceutical impurity reference standard with the molecular formula C18H16ClN3O2 and a molecular weight of 341.79 g/mol.
Based on its molecular formula C18H16ClN3O2, Oxazepam impurity 6 contains a steroid core, an amide group, a hydroxyl group, an ether linkage, chlorine substitution; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 341.79 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
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 | C18H16ClN3O2 |
| Molecular Weight | 341.79 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 |
| 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 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 3 |
Related Oxazepam Standards
Recommended Standards
- Belumosudil Impurity 44 (CAS CATO-C4X-298844)
- tert-Butyl 4-(4-chloro-2-fluorobenzoyl)piperidine-1-carboxylate (CAS 1159826-11-5)
- Glutamic acid Impurity 3 (CAS CATO-C4X-28623)
- tert-Butyl 4-(5-chloro-2-fluorobenzoyl)piperidine-1-carboxylate (CAS 1228631-50-2)
- Alanyl Glutamine Impurity 40 TFA Salt (CAS CATO-C4X-197440)
- Papaverine Impurity 31 (CAS 35118-00-4)
- Plerixafor Impurity C86 (CAS 406939-92-2(free base))
- 4-((Tert-butoxycarbonyl)amino)-1-phenylpiperidine-4-carboxylic acid (CAS 887987-90-8)
- DL-Leucyl-DL-phenylalanine (CAS 56217-82-4)
- (1S,4S)-2-(4-Methoxyphenyl)-2-azabicyclo[2.2.2]octan-5-one (CAS 867144-27-2)
- 3,4-Dihydroacridin-1(2H)-one (CAS 58509-58-3)
- (1-Methyl-1h-pyrrol-3-yl)methanamine (CAS 20863-72-3)
- 1-(2,5-Dimethoxyphenyl)-4,4-dimethyl-1,4-dihydropyrimidine-2-thiol (CAS 1142212-73-4)
- Exenatide (CAS 141758-74-9（free base）)
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