Vinpocetine Impurity 21 CAS 77549-92-9
| CAS No. | 77549-92-9 |
| Molecular Formula | C22H28N2O3 |
| Molecular Weight | 368.47 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Vinpocetine Impurity 21 (CAS 77549-92-9) is a certified pharmaceutical impurity reference standard with the molecular formula C22H28N2O3 and a molecular weight of 368.47 g/mol.
The molecular framework of Vinpocetine Impurity 21 (C22H28N2O3) is characterized by a steroid core, an amide group, a hydroxyl group, an ether linkage. In reversed-phase chromatography, its retention is governed primarily by the protonation state of its nitrogen-containing groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
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 | C22H28N2O3 |
| Molecular Weight | 368.47 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | 97%+ |
| 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 |
| Degree of Unsaturation (DBE) | 10.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1979 |
| Nitrogen Atoms | 2 |
Related Vinpocetine Standards
- Vinpocetine Impurity 26 (CAS CATO-C4X-184326)
- Vinpocetine Impurity 44 (CAS 68780-78-9)
- Vinpocetine EP Impurity A (CAS 40163-56-2)
- Vinpocetine Impurity 34 (CAS CATO-C4X-184334)
- Vinpocetine Impurity 35 (CAS CATO-C4X-184335)
- Vinpocetine Impurity 29 (CAS CATO-C4X-184329)
- Vinpocetine Impurity 39 (CAS 27773-39-3)
- Vinpocetine Impurity 40 (CAS CATO-C4X-184340)
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