| CAS No. | 1006327-12-3 |
| Molecular Formula | C13H11ClN4OS |
| Molecular Weight | 306.77 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including 3-(2-(4-Chloro-1h-pyrazol-1-yl)ethyl)-2-thioxo-2,3-dihydroquinazolin-4(1h)-one.
3-(2-(4-Chloro-1h-pyrazol-1-yl)ethyl)-2-thioxo-2,3-dihydroquinazolin-4(1h)-one (CAS 1006327-12-3), molecular formula C13H11ClN4OS and molecular weight 306.77 g/mol, is a CATO reference standard with documented purity and traceability.
Structurally, 3-(2-(4-Chloro-1h-pyrazol-1-yl)ethyl)-2-thioxo-2,3-dihydroquinazolin-4(1h)-one (C13H11ClN4OS) contains a nitrogen-containing heterocyclic scaffold, an amide group, sulfur-containing functionality, a hydroxyl group, an ether linkage, chlorine substitution. The molecule exhibits a degree of unsaturation (DBE) of 10.0, corresponding to approximately 10 ring(s) or double-bond equivalent(s). With a molecular weight of 306.77 g/mol, it falls into the moderately-high-molecular-weight range. 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 | C13H11ClN4OS |
| Molecular Weight | 306.77 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) | 10.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1988 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 4 |
| Sulfur Atoms | 1 |