Tamsulosin Impurity 31 CAS 4463-59-6
| CAS No. | 4463-59-6 |
| Molecular Formula | C9H11BrO2 |
| Molecular Weight | 231.09 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Based on its molecular formula C9H11BrO2, Tamsulosin Impurity 31 contains a carboxylic acid group, a hydroxyl group, an ether linkage, bromine substitution, an aromatic ring system; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 231.09 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).
As a process- or degradation-related impurity, Tamsulosin Impurity 31 (CAS 4463-59-6, C9H11BrO2) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
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.
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 | C9H11BrO2 |
| Molecular Weight | 231.09 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor) |
| Purity | 97%+ |
| Storage | Store at room temperature, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 4.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1958 |
| Halogen Content | Br-containing |
Related Tamsulosin Standards
- Tamsulosin Impurity 18 (CAS CATO-C4X-118718)
- Tamsulosin Impurity 77 (CAS 1510621-28-9)
- Tamsulosin Impurity 16 (CAS 21003-56-5)
- Tamsulosin Impurity 17 (CAS 21003-57-6)
- Tamsulosin Impurity 15 (CAS 92119-04-5)
- Tamsulosin Impurity 19 (CAS 116091-63-5)
- Tamsulosin Impurity 70 (CAS CATO-C4X-118770)
- Tamsulosin Impurity 71 (CAS CATO-C4X-118771)
Recommended Standards
- 5-bromo-1-(1H-imidazol-1-yl)pentan-1-one (CAS 67538-89-0)
- Methoxamine Impurity 25 (CAS CATO-C4X-202225)
- 352637-44-6 6-Bromo-3-cyanopyrazolo[1,5-a]pyrimidine 6-bromopyrazolo[1,5-a]pyrimidine-3-carbonitrile (CAS 352637-44-6)
- Lusutrombopag Impurity 66 (CAS 2095308-79-3)
- Roxadustat Impurity 59 (CAS CATO-C4X-221359)
- Theophylline impurity 7 (CAS CATO-C4X-18237)
- Olopatadine Impurity 24 (CAS 3607-17-8)
- 81066-72-0 2-tert-Butyl-4,5-dihydro-1H-imidazole MFCD15146541 (CAS 81066-72-0)
- 1,3-Bis(4-bromophenyl)urea (CAS 6341-55-5)
- Tetramisole-D5 hydrochloride (CAS 1173021-85-6)
- 1-(2-Methylpyrrolidin-1-yl)prop-2-en-1-one (CAS 90154-94-2)
- 2-Isopropyl-4-methyl-1H-imidazole-5-carbaldehyde (CAS 97749-74-1)
- 3-(1,3-Dithiolan-2-yl)phenol (CAS 27004-28-0)
- Semaglutide impurity 71 (CAS CATO-C4X-222671)
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