6-Iodo-2-thioxo-3-(m-tolyl)-2,3-dihydroquinazolin-4(1H)-one CAS 18741-40-7
| CAS No. | 18741-40-7 |
| Molecular Formula | C15H11IN2OS |
| Molecular Weight | 394.23 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
6-Iodo-2-thioxo-3-(m-tolyl)-2,3-dihydroquinazolin-4(1H)-one (CAS 18741-40-7), molecular formula C15H11IN2OS and molecular weight 394.23 g/mol, is a CATO reference standard with documented purity and traceability.
Structurally, 6-Iodo-2-thioxo-3-(m-tolyl)-2,3-dihydroquinazolin-4(1H)-one (C15H11IN2OS) contains a nitrogen-containing heterocyclic scaffold, an amide group, sulfur-containing functionality, a hydroxyl group, an ether linkage, iodine substitution. The molecule exhibits a degree of unsaturation (DBE) of 11.0, corresponding to approximately 11 ring(s) or double-bond equivalent(s). With a molecular weight of 394.23 g/mol, it falls into the moderately-high-molecular-weight range. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
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.
As a certified reference material (CRM), 6-Iodo-2-thioxo-3-(m-tolyl)-2,3-dihydroquinazolin-4(1H)-one meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
Physical & Chemical Properties
| Molecular Formula | C15H11IN2OS |
| Molecular Weight | 394.23 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 11.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1962 |
| Halogen Content | I-containing |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 1 |
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