Tulobuterol Impurity 19 CAS 18366-40-0
| CAS No. | 18366-40-0 |
| Molecular Formula | C12H19NO |
| Molecular Weight | 193.29 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Tulobuterol Impurity 19 (C12H19NO) contains a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage. Its high carbon-to-hydrogen ratio confers good lipid solubility; these physicochemical properties determine the optimal preparation and storage of its standard solutions. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
Tulobuterol Impurity 19 (CAS 18366-40-0) is a certified pharmaceutical impurity reference standard with the molecular formula C12H19NO and a molecular weight of 193.29 g/mol.
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.
As a certified reference material (CRM), Tulobuterol Impurity 19 meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
Physical & Chemical Properties
| Molecular Formula | C12H19NO |
| Molecular Weight | 193.29 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 4.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1962 |
| Nitrogen Atoms | 1 |
Related Tulobuterol Standards
- Tulobuterol Impurity 11 (CAS 14467-32-4)
- Tulobuterol Impurity N8 (CAS 118888-64-5)
- Tulobuterol Impurity 21 (CAS CATO-C4X-213421)
- Tulobuterol Impurity N3 (CAS 2425-28-7)
- Tulobuterol Impurity 4 (CAS 59365-60-5)
- Tulobuterol Impurity 3 (CAS 133662-20-1)
- Tulobuterol Impurity 10 (CAS 69240-94-4)
- Tulobuterol Impurity 12 (CAS 14185-28-5)
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- D-myo-Inositol, 1,2,6-tris(dihydrogen phosphate), xsodium salt (CAS 120965-76-6)
- 3-(4-Methylphenyl)-1,2-thiazole-4-carboxylic acid (CAS 67049-13-2)
- Sulfo-SPP (CAS 452072-27-4)
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