| CAS No. | 25796-80-9 |
| Molecular Formula | C9H4OS2 |
| Molecular Weight | 192.26 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Compared with other compounds in its class, the molecular weight of 192.26 g/mol gives 4H-Cyclopenta[2,1-b:3,4-c']dithiophen-4-one distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
4H-Cyclopenta[2,1-b:3,4-c']dithiophen-4-one (CAS 25796-80-9), molecular formula C9H4OS2 and molecular weight 192.26 g/mol, is a CATO reference standard with documented purity and traceability.
4H-Cyclopenta[2,1-b:3,4-c']dithiophen-4-one (C9H4OS2) contains sulfur-containing functionality, a hydroxyl group, an ether linkage, an aromatic ring system. Its physicochemical properties are representative of its class; 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).
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 | C9H4OS2 |
| Molecular Weight | 192.26 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1964 |
| Sulfur Atoms | 2 |