Tolterodine Impurity 28 HCl CAS CATO-C4X-176728
| CAS No. | CATO-C4X-176728 |
| Molecular Formula | C23H33NO |
| Molecular Weight | N/A |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
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.
Tolterodine Impurity 28 HCl (CAS CATO-C4X-176728) is a certified pharmaceutical impurity reference standard with the molecular formula C23H33NOHCl and a molecular weight of 375.98 g/mol.
The molecular framework of Tolterodine Impurity 28 HCl (C23H33NOHCl) is characterized by a steroid core, an amide group, a hydroxyl group, an ether linkage, chlorine substitution. In reversed-phase chromatography, its retention is governed primarily by its high hydrophobicity (logP), which provides a practical basis for HPLC-UV/DAD or LC-MS method development. The high carbon-to-hydrogen ratio imparts good lipophilicity, allowing liquid-liquid extraction with non-polar solvents such as n-hexane or ethyl acetate.
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 | C23H33NO HCl |
| Molecular Weight | 375.98 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 1 |
Related Tolterodine Standards
- Tolterodine Impurity 21 (CAS 1043911-42-7)
- Tolterodine EP Impurity C (CAS 1161940-88-0)
- Tolterodine Impurity N5 (CAS 1189501-90-3)
- Rac- Tolterodine-D14 Hydrochloride (CAS 1246816-99-8)
- rac-Tolterodine-d14 Tartrate (CAS 1246911-91-0)
- Tolterodine Impurity 4 (CAS 124935-88-2)
- Tolterodine Impurity 18 (CAS 124935-89-3)
- rac-Tolterodine hydrochloride, 98% (CAS 124936-75-0)
Recommended Standards
- Atorvastatin Impurity 32 (CAS 186508-94-1)
- Iguratimod Impurity 16 (CAS CATO-C4X-182616)
- Doxepin Impurity N1 (CAS 866996-44-3)
- Shi Epoxidation Diketal Catalyst (CAS 18422-53-2)
- 4-(4-Bromobenzoyl)-8-propyl-1-oxa-4,8-diazaspiro[4.5]decane-3-carboxylic acid (CAS 1326811-13-5)
- 1-Methyl-3-phenyl-1h-1,2,4-triazol-5-amine (CAS 3357-30-0)
- tert-Butyl (5-(chlorocarbonyl)thiazol-2-yl)carbamate (CAS 302964-20-1)
- (4-Fluoro-3-methyl-5-(trifluoromethyl)phenyl)methanol (CAS 1373921-08-4)
- 2,2,2-Trifluoro-N-(3-methoxyphenyl)acetamide (CAS 14818-55-4)
- Peptide Impurity 15 (CAS 1227750-69-7)
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