| CAS No. | 324022-74-4 |
| Molecular Formula | C18H15N3OS |
| Molecular Weight | 321.40 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Compared with other compounds in its class, the molecular weight of 321.40 g/mol gives (E)-2-((1-methyl-2-oxoindolin-3-ylidene)amino)-4,5,6,7-tetrahydrobenzo[b]thiophene-3-carbonitrile distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
CATO supplies (E)-2-((1-methyl-2-oxoindolin-3-ylidene)amino)-4,5,6,7-tetrahydrobenzo[b]thiophene-3-carbonitrile (CAS 324022-74-4), a certified reference material (molecular formula C18H15N3OS, MW 321.40 g/mol) for analytical method development and quality control.
Based on its molecular formula C18H15N3OS, (E)-2-((1-methyl-2-oxoindolin-3-ylidene)amino)-4,5,6,7-tetrahydrobenzo[b]thiophene-3-carbonitrile contains a steroid core, an amide group, sulfur-containing functionality, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 321.40 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).
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
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 | C18H15N3OS |
| Molecular Weight | 321.40 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 13.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2025 |
| Nitrogen Atoms | 3 |
| Sulfur Atoms | 1 |