Tulobuterol impurity 24 CAS 25847-29-4
| CAS No. | 25847-29-4 |
| Molecular Formula | C8H5Br2ClO |
| Molecular Weight | 312.39 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
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.
Tulobuterol impurity 24 (CAS 25847-29-4) is a certified pharmaceutical impurity reference standard with the molecular formula C8H5Br2ClO and a molecular weight of 312.39 g/mol.
Based on its molecular formula C8H5Br2ClO, Tulobuterol impurity 24 contains a hydroxyl group, an ether linkage, chlorine/bromine substitution, an aromatic ring system; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 312.39 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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.
Physical & Chemical Properties
| Molecular Formula | C8H5Br2ClO |
| Molecular Weight | 312.39 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor, low volatility) |
| Purity | 97%+ |
| Storage | Store at room temperature |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure |
| Degree of Unsaturation (DBE) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1964 |
| Halogen Content | Cl/Br-containing |
Related Tulobuterol Standards
- Tulobuterol Impurity N6 (CAS 34356-83-7)
- Tulobuterol Impurity N7 (CAS 179749-59-8)
- Tulobuterol Impurity 7 (CAS CATO-C4X-21347)
- Tulobuterol Impurity 35 (CAS 1597775-10-4)
- Tulobuterol Impurity 25 (CAS CATO-C4X-213425)
- Tulobuterol Impurity 27 (CAS CATO-C4X-213427)
- Tulobuterol Impurity 22 (CAS 5639-00-9)
- Tulobuterol Impurity 15 (CAS CATO-C4X-213415)
Recommended Standards
- 897344-01-3 5-[(1-Ethyl-5-methyl-1H-pyrazol-4-yl)methylene]-2-mercapto-3-phenyl-3,5-dihydro-4H-imidazol-4-one MFCD28505124 (CAS 897344-01-3)
- Phenyl 2-(benzylthio)-4,5-dihydro-1H-imidazole-1-carboxylate (CAS 320424-40-6)
- H-Met-Tyr-OH (CAS 13589-04-3)
- N-Benzyl-3-(2-oxobenzo[d]thiazol-3(2H)-yl)propanamide (CAS 851989-61-2)
- Iguratimod Impurity 118 (CAS CATO-C4X-1826118)
- Tramadol Impurity 21 (CAS CATO-C4X-149821)
- Picosulfate Impurity 8 (CAS 2379878-05-2)
- 5,7-Dimethyl-2-sulfanylpyrido[2,3-d]pyrimidin-4-ol (CAS 49600-56-8)
- N-(3-(2-Oxo-1,2-dihydropyridine-3-carboxamido)propyl)-5-phenylisoxazole-3-carboxamide (CAS 1883510-31-3)
- 2-Bromo-N-cyclohexyl-2-methylpropanamide (CAS 110228-40-5)
- N-(3-(1H-Imidazol-1-yl)propyl)-2-methoxy-4,5-dimethylbenzenesulfonamide (CAS 898640-89-6)
- 2-Amino-N-((1-benzylpyrrolidin-2-yl)methyl)-N-ethylacetamide (CAS 1353984-50-5)
- 3-fluoro-6-nitro-1H-indazole (CAS 1346549-19-6)
- DAPK Substrate Peptide (CAS 386769-53-5)
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