1-(4-Chlorophenyl)-4-ethoxy-[1,2,4]triazolo[4,3-a]quinoxaline CAS 138679-22-8
| CAS No. | 138679-22-8 |
| Molecular Formula | C17H13ClN4O |
| Molecular Weight | 324.76 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), 1-(4-Chlorophenyl)-4-ethoxy-[1,2,4]triazolo[4,3-a]quinoxaline 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.
1-(4-Chlorophenyl)-4-ethoxy-[1,2,4]triazolo[4,3-a]quinoxaline (CAS 138679-22-8) is a high-purity analytical reference standard with the molecular formula C17H13ClN4O and a molecular weight of 324.76 g/mol.
Structurally, 1-(4-Chlorophenyl)-4-ethoxy-[1,2,4]triazolo[4,3-a]quinoxaline (C17H13ClN4O) contains a steroid core, an amide group, a hydroxyl group, an ether linkage, chlorine substitution. The molecule exhibits a degree of unsaturation (DBE) of 13.0, corresponding to approximately 13 ring(s) or double-bond equivalent(s). With a molecular weight of 324.76 g/mol, it falls into the moderately-high-molecular-weight range. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C17H13ClN4O |
| Molecular Weight | 324.76 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor) |
| 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) | 13.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1996 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 4 |
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Recommended Standards
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- 1,1,1,3,3,3-Hexamethyl-2-phenyl-2-(trimethylsilyl)trisilane (CAS 4235-65-8)
- (4-Bromo-2-methyl-phenyl)-pyrrolidin-1-yl-methanone (CAS 276678-35-4)
- N-(1-Ethylpropyl)cyclopropanamine (CAS 926196-77-2)
- 2,4-Dimethyl-2,5-dihydrothiophene 1,1-dioxide (CAS 10033-92-8)
- Seleniumsulfide (CAS 7446-34-6)
- (2R,3R,4S,5R)-2-(6-Amino-2,8-dimethyl-9H-purin-9-yl)-5-(hydroxymethyl)tetrahydrofuran-3,4-diol (CAS 63954-66-5)
- 3-Oxo-n-[4-(propan-2-yl)phenyl]butanamide (CAS 401639-34-7)
- 5-(Benzo[d][1,3]dioxole-5-carbonyl)furan-2-carboxylic acid (CAS 1399657-50-1)
- N-(2-amino-4-methoxyphenyl)-4-hydroxybenzamide (CAS 1016704-90-7)
- 4-(3-methylazetidin-1-yl)piperidine trihydrochloride (CAS 864441-92-9)
- Tirzepatide Impurity 10 (CAS CATO-C4X-324010)
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