Anastrozole Impurity 31 CAS CATO-C4X-123931
| CAS No. | CATO-C4X-123931 |
| Molecular Formula | C10H12Br2 |
| Molecular Weight | 292.01 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of Anastrozole Impurity 31 is closely related to bromine substitution, an aromatic ring system in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
As a process- or degradation-related impurity, Anastrozole Impurity 31 (CAS CATO-C4X-123931, C10H12Br2) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
Based on its molecular formula C10H12Br2, Anastrozole Impurity 31 contains bromine substitution, an aromatic ring system; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 292.01 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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.
CATO manufactures Anastrozole Impurity 31 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 | C10H12Br2 |
| Molecular Weight | 292.01 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor, low volatility) |
| Purity | 97%+ |
| Storage | Store at room temperature, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate |
| Stability | May oxidize slowly on prolonged air exposure |
| Degree of Unsaturation (DBE) | 4.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Halogen Content | Br-containing |
Related Anastrozole Standards
- Anastrozole (CAS 120511-73-1)
- Anastrozole EP Impurity G (CAS 120511-92-4)
- Anastrozole Impurity 32 (CAS CATO-C4X-123932)
- Anastrozole EP Impurity A (CAS 1215780-15-6)
- Anastrozole EP Impurity C (CAS 120511-84-4)
- Anastrozole-d12 (CAS 120512-32-5)
- Anastrozole Impurity 12 (CAS 19294-04-3)
- Anastrozole Impurity 30 (CAS CATO-C4X-123930)
Recommended Standards
- 3,5-Dibromo-4-n-butylbenzene (CAS 75894-94-9)
- Vericiguat Impurity 59 (CAS CATO-C4X-289659)
- 2,5-Dibromo-1,3-diethylbenzene (CAS 314084-64-5)
- 3-(4-Carboxybutoxy)-2,4,6-trifluorophenylboronic acid (CAS 1072946-61-2)
- Cefminox Impurity 3 (CAS CATO-C4X-19263)
- Tirofiban Impurity 57 (CAS CATO-C4X-125457)
- Trazodone EP Impurity C (CAS 157072-19-0)
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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