Tamsulosin Impurity 11 CAS 3250-73-5
| CAS No. | 3250-73-5 |
| Molecular Formula | C10H14O3 |
| Molecular Weight | 182.22 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Tamsulosin Impurity 11 (C10H14O3) contains a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system. It is notably hygroscopic, 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. 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 Tamsulosin Impurity 11 (CAS 3250-73-5), a pharmacopoeial impurity reference standard (molecular formula C10H14O3, MW 182.22 g/mol) used for the identification and quantification of trace impurities in APIs.
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 | C10H14O3 |
| Molecular Weight | 182.22 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at 2-8°C, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 4.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1957 |
Related Tamsulosin Standards
- Tamsulosin EP Impurity F (CAS 6781-17-5)
- Tamsulosin Impurity 12 (CAS CATO-C4X-118712)
- Tamsulosin Impurity 15 (CAS 3251-30-7)
- Tamsulosin Impurity 30 (CAS 589-10-6)
- Tamsulosin EP Impurity E (CAS 105764-07-6)
- Tamsulosin Impurity 28 (CAS 1495375-67-1)
- Tamsulosin Impurity 15 (CAS 92119-04-5)
- Tamsulosin Impurity 16 (CAS 21003-56-5)
Recommended Standards
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