1-Methyl-4,5-dihydro-[1,2,4]triazolo[4,3-a]quinoxaline CAS 149668-99-5
| CAS No. | 149668-99-5 |
| Molecular Formula | C10H8N4O |
| Molecular Weight | 200.20 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including 1-Methyl-4,5-dihydro-[1,2,4]triazolo[4,3-a]quinoxaline.
1-Methyl-4,5-dihydro-[1,2,4]triazolo[4,3-a]quinoxaline (CAS 149668-99-5), molecular formula C10H8N4O and molecular weight 200.20 g/mol, is a CATO reference standard with documented purity and traceability.
Structurally, 1-Methyl-4,5-dihydro-[1,2,4]triazolo[4,3-a]quinoxaline (C10H8N4O) contains a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 9.0, corresponding to approximately 9 ring(s) or double-bond equivalent(s). With a molecular weight of 200.20 g/mol, it falls into the medium-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.
Physical & Chemical Properties
| Molecular Formula | C10H8N4O |
| Molecular Weight | 200.20 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (faint amine-like odor) |
| 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) | 9.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1999 |
| Nitrogen Atoms | 4 |
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- (Z)-1-Iodobut-2-ene (CAS 53121-23-6)
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- Semaglutide impurity 227 (CAS CATO-C4X-2226227)
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