1,2-Dimethoxy-12-methyl-[1,3]dioxolo-[4,5:4,5]benzo[1,2-c]phenanthridin-12-ium CAS 478-03-5
| CAS No. | 478-03-5 |
| Molecular Formula | C21H18NO4 |
| Molecular Weight | 348.37 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
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.
1,2-Dimethoxy-12-methyl-[1,3]dioxolo-[4,5:4,5]benzo[1,2-c]phenanthridin-12-ium (CAS 478-03-5), molecular formula C21H18NO4 and molecular weight 348.37 g/mol, is a CATO reference standard with documented purity and traceability.
1,2-Dimethoxy-12-methyl-[1,3]dioxolo-[4,5:4,5]benzo[1,2-c]phenanthridin-12-ium (C21H18NO4) contains a flavonoid core, an amide group, a hydroxyl group, an ether linkage. The carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
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.
Physical & Chemical Properties
| Molecular Formula | C21H18NO4 |
| Molecular Weight | 348.37 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 methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 13.5 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1957 |
| Nitrogen Atoms | 1 |
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Recommended Standards
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- 2-{[3-cyano-5-(ethoxycarbonyl)-4-(furan-2-yl)-6-methyl-1,4-dihydropyridin-2-yl]sulfanyl}acetic acid (CAS 852389-14-1)
- 3'-Acetyl-[1,1'-biphenyl]-4-carboxylicacid (CAS 199678-04-1)
- 5-Cyclobutylisoxazole-4-carboxylic acid (CAS 1785112-48-2)
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- 5-(4-tert-Butylphenyl)cyclohexane-1,3-dione (CAS 946686-29-9)
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- (E)-3-(dimethylamino)-1-(3-fluoro-5-(trifluoromethyl)phenyl)prop-2-en-1-one (CAS 154258-42-1)
- 5-Ethenyl-2-methoxy-pyridine (CAS 24674-39-3)
- Clotrimazole Impurity 12 (CAS 15145-69-4)
- D-Ser32-Tirzepatide (CAS CATO-CPTD788677)
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