Tamsulosin Impurity 38 CAS 116091-64-6
| CAS No. | 116091-64-6 |
| Molecular Formula | C18H24N2O3S |
| Molecular Weight | N/A |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Owing to a steroid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage, chlorine substitution, Tamsulosin Impurity 38 is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 384.92 g/mol — guide the selection of appropriate sample preparation and analytical techniques. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
As a process- or degradation-related impurity, Tamsulosin Impurity 38 (CAS 116091-64-6, C18H24N2O3SHCl) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
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 | C18H24N2O3S HCl |
| Molecular Weight | 384.92 g/mol |
| Purity | >95% |
| 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) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1990 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 1 |
Related Tamsulosin Standards
- Tamsulosin Impurity 68 (CAS 1027854-97-2)
- Tamsulosin EP Impurity F HCl (CAS 1051368-80-9)
- Tamsulosin EP Impurity E (CAS 105764-07-6)
- (R)-Tamsulosin (CAS 106133-20-4)
- Tamsulosin EP Impurity G (CAS 106138-88-9)
- Tamsulosin Hydrochloride (CAS 106463-17-6)
- Tamsulosin EP Impurity G HCl (CAS 106463-19-8)
- Tamsulosin Impurity 59 (CAS 1073231-99-8)
Recommended Standards
- Revefenacin impurity 94 (CAS CATO-C4X-203194)
- Benserazide Impurity 58 (CAS CATO-C4X-142758)
- Cilnidipine Impurity 28 (CAS 62760-08-1)
- 3-Methyl-5-(tributylstannyl)pyridine (CAS 167556-63-0)
- 6-Bromo-2,5-dimethyl-[1,2,4]triazolo[1,5-a]pyrimidin-7(4H)-one (CAS 1630763-69-7)
- Ethyl 4-(4,4-dimethyl-2,6-dioxopiperidin-1-yl)benzoate (CAS 279692-23-8)
- 1-(1,3-thiazol-5-yl)ethan-1-one (CAS 91516-28-8)
- 1-Benzyl-4-[3-(4-chlorophenyl)-5-(methylsulfanyl)thiophene-2-carbonyl]piperazine (CAS 477858-00-7)
- Tadalafil Impurity 28 (CAS CATO-C4X-108728)
- Tau Peptide (512-525) amide trifluoroacetate salt (CAS 2022956-61-0)
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