5,8-DIMETHYL-3,4-DIHYDRO-2H-1-BENZOTHIOPYRAN-4-ONE CAS 187271-05-2
| CAS No. | 187271-05-2 |
| Molecular Formula | C11H12OS |
| Molecular Weight | 192.28 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.
5,8-DIMETHYL-3,4-DIHYDRO-2H-1-BENZOTHIOPYRAN-4-ONE (CAS 187271-05-2) is a high-purity analytical reference standard with the molecular formula C11H12OS and a molecular weight of 192.28 g/mol.
Owing to sulfur-containing functionality, a hydroxyl group, an ether linkage, an aromatic ring system, 5,8-DIMETHYL-3,4-DIHYDRO-2H-1-BENZOTHIOPYRAN-4-ONE is typically off-white to pale yellow low-melting solid. Its solid-state physicochemical attributes — including a molecular weight of 192.28 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The high carbon-to-hydrogen ratio imparts good lipophilicity, allowing liquid-liquid extraction with non-polar solvents such as n-hexane or ethyl acetate.
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 | C11H12OS |
| Molecular Weight | 192.28 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2010 |
| Sulfur Atoms | 1 |
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