4,5-dimethyl 2-[bis(methoxycarbonyl)-2H-1,3-dithiol-2-ylidene]-2H-1,3-dithiole-4,5-dicarboxylate CAS 26314-39-6
| CAS No. | 26314-39-6 |
| Molecular Formula | C14H12O8S4 |
| Molecular Weight | 436.50 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
4,5-dimethyl 2-[bis(methoxycarbonyl)-2H-1,3-dithiol-2-ylidene]-2H-1,3-dithiole-4,5-dicarboxylate (C14H12O8S4) contains a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, a polycyclic aromatic system. It is notably hygroscopic, 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).
4,5-dimethyl 2-[bis(methoxycarbonyl)-2H-1,3-dithiol-2-ylidene]-2H-1,3-dithiole-4,5-dicarboxylate (CAS 26314-39-6), molecular formula C14H12O8S4 and molecular weight 436.50 g/mol, is a CATO reference standard with documented purity and traceability.
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.
Physical & Chemical Properties
| Molecular Formula | C14H12O8S4 |
| Molecular Weight | 436.50 g/mol |
| Purity | 97%+ |
| Storage | Store in a cool place (≤25°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; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 9.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1964 |
| Sulfur Atoms | 4 |
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Recommended Standards
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- 2-(Pyridin-2-ylmethyl)pyrimidine-4-carboxylic acid (CAS 1342559-67-4)
- 1-(2,4-Dichloro-5-isopropoxyphenyl)-5-phenyl-1H-tetrazole (CAS 338961-43-6)
- Ethyl 6-amino-2-(chloromethyl)-5-cyano-4-(1-ethyl-1H-pyrazol-4-yl)-4H-pyran-3-carboxylate (CAS 1005611-67-5)
- 2-(3-Methylpyrrolidin-1-yl)ethanol (CAS 126512-75-2)
- Ethyl 4-(2,4-dichlorophenoxy)-2-(methylthio)pyrimidine-5-carboxylate (CAS 672950-48-0)
- Neuropeptide Y, porcine (CAS 82785-45-3)
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