Oxazepam impurity 13 CAS 3646-61-5
| CAS No. | 3646-61-5 |
| Molecular Formula | C26H16Cl2N2 |
| Molecular Weight | 427.32 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Owing to a nitrogen-containing heterocyclic scaffold, a nitrile group, chlorine substitution, Oxazepam impurity 13 is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 427.32 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The high carbon-to-hydrogen ratio imparts good lipophilicity, allowing liquid-liquid extraction with non-polar solvents such as n-hexane or ethyl acetate.
CATO supplies Oxazepam impurity 13 (CAS 3646-61-5), a pharmacopoeial impurity reference standard (molecular formula C26H16Cl2N2, MW 427.32 g/mol) used for the identification and quantification of trace impurities in APIs.
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.
CATO manufactures Oxazepam impurity 13 under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C26H16Cl2N2 |
| Molecular Weight | 427.32 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor, low volatility) |
| Purity | 97%+ |
| Storage | Store at room temperature, protect from light |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 19.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1958 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 2 |
Related Oxazepam Standards
- Oxazepam impurity 14 (CAS 6801-81-6)
- Oxazepam impurity 10 (CAS CATO-C4X-309010)
- Oxazepam impurity 6 (CAS CATO-C4X-30906)
- Oxazepam impurity 2 (CAS 5628-00-2)
- Oxazepam EP Impurity B (CAS 1824-74-4)
- Oxazepam Impurity 2 (CAS 17977-76-3)
- Oxazepam impurity 1 (CAS CATO-C4X-30901)
- Oxazepam impurity 7 (CAS 18878-19-8)
Recommended Standards
- N-((3,5-bis(trifluoromethyl)phenyl)sulfonyl)-N-phenylglycine (CAS 339102-70-4)
- Afuresertib (CAS 1047644-62-1)
- Hisphen (CAS 2764-56-9)
- Losartan Impurity K (CAS 1159977-26-0)
- Ledipasvir Impurity 48 (CAS CATO-C4X-331348)
- Daclatasvir Impurity 18 (CAS CATO-C4X-184818)
- Paroxetine EP Impurity A HCl (CAS 1394842-91-1)
- 1-(1-(2-Fluoroethyl)-1h-pyrazol-3-yl)-N-methylmethanamine (CAS 1427022-46-5)
- 4-Fluoro-3-methylcinnamic acid (CAS 152152-18-6)
- 1,5,6,7,8,9-Hexahydro-4H-cyclohepta[4,5]thieno[2,3-d]pyrimidin-4-one (CAS 40106-31-8)
- 5-Hydroxy-3-methyl-2-oxoimidazolidine-1-carboxamide (CAS 162830-39-9)
- Methyl 3-(phenylethynyl)benzoate (CAS 207845-32-7)
- 5-Bromo-2,4'-bipyridine (CAS 106047-33-0)
- Semaglutide impurity 269 (CAS CATO-C4X-2226269)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com