Dapoxetine Impurity 91 CAS CATO-C4X-143991
| CAS No. | CATO-C4X-143991 |
| Molecular Formula | C28H28O3 |
| Molecular Weight | 412.52 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Dapoxetine Impurity 91 (CAS CATO-C4X-143991) is a certified pharmaceutical impurity reference standard with the molecular formula C28H28O3 and a molecular weight of 412.52 g/mol.
Dapoxetine Impurity 91 (C28H28O3) contains a steroid core, a hydroxyl group, an ether linkage. 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 aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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 | C28H28O3 |
| Molecular Weight | 412.52 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at room temperature, protect from light, keep sealed and dry |
| 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) | 15.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
Related Dapoxetine Standards
- Dapoxetine Impurity 81 (CAS 2415108-74-4)
- Dapoxetine Impurity 55 (CAS 2242008-36-0)
- Dapoxetine Impurity 66 (CAS 864529-90-8)
- Dapoxetine Impurity 85 (CAS 2245197-11-7)
- Dapoxetine Impurity 79 (CAS CATO-C4X-143979)
- Dapoxetine Impurity 54 (CAS CATO-C4X-143954)
- Dapoxetine Impurity 76 (CAS CATO-C4X-143976)
- Dapoxetine Impurity 68 (CAS 2716202-38-7)
Recommended Standards
- Cyproterone Acetate EP Impurity B (CAS CATO-C4X-16013)
- N-Nitroso Venlafaxine EP Impurity H (Mixture of Diastereomers) (CAS CATO-C4X-143453)
- Adapalene Impurity 12 (CAS 1063712-23-1)
- Budesonide EP Impurity H (Mixture of Epimer) (CAS 313474-58-7)
- Asenapine Impurity 4 (CAS CATO-C4X-19474)
- DL-Ceftizoxime Impurity N2 (CAS 68697-60-9)
- CAS 1628530-47-1 (CAS 1628530-47-1)
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- (7-Bromobenzofuran-5-yl)methanol (CAS 286836-24-6)
- N'-(9-((2R,4S,5R)-4-Hydroxy-5-(hydroxymethyl)tetrahydrofuran-2-yl)-9H-purin-6-yl)-N,N-diisopropylformimidamide (CAS 89128-68-7)
- 1-((2R,3S,4S,5R)-4-(benzyloxy)-5-((benzyloxy)methyl)-5-(fluoromethyl)-3-hydroxytetrahydrofuran-2-yl)pyrimidine-2,4(1H,3H)-dione (CAS 196604-62-3)
- Semaglutide impurity 108 (CAS CATO-C4X-2226108)
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