7-Chloro-3-oxo-3,4-dihydroquinoxaline-2-carboxylic acid CAS 4017-34-9
| CAS No. | 4017-34-9 |
| Molecular Formula | C9H5ClN2O3 |
| Molecular Weight | 224.60 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Structurally, 7-Chloro-3-oxo-3,4-dihydroquinoxaline-2-carboxylic acid (C9H5ClN2O3) contains a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage, chlorine substitution. The molecule exhibits a degree of unsaturation (DBE) of 8.0, corresponding to approximately 8 ring(s) or double-bond equivalent(s). With a molecular weight of 224.60 g/mol, it falls into the medium-molecular-weight range. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
CATO supplies 7-Chloro-3-oxo-3,4-dihydroquinoxaline-2-carboxylic acid (CAS 4017-34-9), a certified reference material (molecular formula C9H5ClN2O3, MW 224.60 g/mol) for analytical method development and quality control.
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 | C9H5ClN2O3 |
| Molecular Weight | 224.60 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor, faint amine-like odor) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1958 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 2 |
Related Chloro Standards
- 1-(2-Chloro-6-nitrophenyl)-1H-1,2,4-triazole (CAS 1018053-08-1)
- 6-Chloro-3-nitroquinolin-4-ol (CAS 101861-61-4)
- 8-Chloro-2-oxo-2H-chromene-3-carboxylic acid (CAS 107747-67-1)
- 2-Chloro-7-nitroquinazolin-4-amine (CAS 1107694-81-4)
- [(3-chloro-4-cyanophenyl)carbamoyl]formic acid (CAS 1153559-74-0)
- 2-Chloro-5-nitro-1H-indole-3-carbaldehyde (CAS 117752-76-8)
- 2-Chloro-6-nitroquinazolin-4-amine (CAS 1279870-95-9)
- 2-Chloro-3-nitroquinolin-4-ol (CAS 1314946-36-5)
Recommended Standards
- 7-Chloro-2-oxo-2H-chromene-3-carboxylic acid (CAS 20300-58-7)
- 7-Chloro-4-hydroxy-3-nitroquinoline (CAS 5350-50-5)
- 6-Chlorochromone-2-carboxylic acid, 97% (CAS 5006-45-1)
- 7-Chloro-4-oxo-1,4-dihydro-1,5-naphthyridine-3-carboxylic acid (CAS 27330-42-3)
- Chlortalidone Sulfochloro Impurity (CAS 68592-12-1)
- 5,5-Difluoro-1-methyl-4,5,6,7-tetrahydro-1H-indazole-3-carboxylic acid (CAS 1784893-60-2)
- N-(2-Chlorobenzyl)-2-(6-methyl-2,4-dioxo-1,2,3,4-tetrahydropyrimidin-5-yl)acetamide (CAS 1173081-75-8)
- 4-benzyl-1-(thiophene-2-carbonyl)thiosemicarbazide (CAS 139614-66-7)
- 1-(Aminomethyl)-4,4-dimethylcyclohexane-1-carboxylic acid (CAS 1509522-42-2)
- 1-(2-Aminoethyl)pyrimidine-2,4(1h,3h)-dione (CAS 34386-72-6)
- 2-Fluorobenzyl 1-(2-fluorobenzyl)piperidine-3-carboxylate (CAS 1261233-00-4)
- Firocoxib (CAS 189954-96-9)
- 2-(3-Amino-5-cyclopropyl-1H-pyrazol-1-yl)ethan-1-ol (CAS 1427013-47-5)
- [D-Glu]3-Semaglutide (CAS CATO-C4X-2226253)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com