7H-Cyclopenta[1,2-b:3,4-b']dithiophen-7-one CAS 25796-83-2
| CAS No. | 25796-83-2 |
| Molecular Formula | C9H4OS2 |
| Molecular Weight | 192.26 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
7H-Cyclopenta[1,2-b:3,4-b']dithiophen-7-one (CAS 25796-83-2), molecular formula C9H4OS2 and molecular weight 192.26 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C9H4OS2, 7H-Cyclopenta[1,2-b:3,4-b']dithiophen-7-one contains sulfur-containing functionality, a hydroxyl group, an ether linkage, an aromatic ring system; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 192.26 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.
Physical & Chemical Properties
| 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 |
Related H Standards
- 4H-Cyclopenta[1,2-b:5,4-b']dithiophen-4-one (CAS 25796-77-4)
- 4H-Cyclopenta[2,1-b:3,4-c']dithiophen-4-one (CAS 25796-80-9)
- 7H-Cyclopenta[1,2-b:3,4-c']dithiophen-7-one (CAS 25959-73-3)
- 7H-Cyclopenta[1,2-b:4,3-b']dithiophen-7-one (CAS 25796-72-9)
- 7H-Cyclopenta[1,2-c:3,4-c']dithiophen-7-one (CAS 25796-78-5)
- 1H-Cyclopenta[b]imidazo[4,5-g]indole (CAS 105790-42-9)
- Di(cyclopenta-1,3-dien-1-yl)dimethylsilane (CAS 18053-74-2)
- 1H-Cyclopenta[b]naphthalene-1,3(2H)-dione (CAS 22734-61-8)
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- N-(2,5-Dichloro-phenyl)-malonamic acid (CAS 25589-36-0)
- N-(3-amino-2-hydroxypropyl)-3-chloro-N-methylbenzenesulfonamide hydrochloride (CAS 1417634-27-5)
- (S)-2-(5,7-Dioxo-5,7-dihydro-6h-pyrrolo[3,4-b]pyrazin-6-yl)propanoic acid (CAS 126310-27-8)
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