| CAS No. | 3565-77-3 |
| Molecular Formula | C21H34O4 |
| Molecular Weight | 350.49 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Compared with other compounds in its class, the molecular weight of 350.49 g/mol gives 2,5-Dimethoxy-3-tridecyl-[1,4]benzoquinone distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
2,5-Dimethoxy-3-tridecyl-[1,4]benzoquinone (CAS 3565-77-3) is a high-purity analytical reference standard with the molecular formula C21H34O4 and a molecular weight of 350.49 g/mol.
Based on its molecular formula C21H34O4, 2,5-Dimethoxy-3-tridecyl-[1,4]benzoquinone contains a steroid core, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 350.49 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 is suitable for quantitative analysis on major chromatographic platforms including HPLC, GC, LC-MS/MS, and GC-MS, serving as an external calibration standard or a system suitability test reference material.
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.
| Molecular Formula | C21H34O4 |
| Molecular Weight | 350.49 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at room temperature, keep sealed and dry |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| 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.) | 1958 |