7-Chloro-3,4-dihydro-3-oxo-4-(phenylmethyl)-2-quinoxalinepropanoic acid CAS 568543-95-3
| CAS No. | 568543-95-3 |
| Molecular Formula | C18H15ClN2O3 |
| Molecular Weight | 342.78 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
7-Chloro-3,4-dihydro-3-oxo-4-(phenylmethyl)-2-quinoxalinepropanoic acid (CAS 568543-95-3) is a high-purity analytical reference standard with the molecular formula C18H15ClN2O3 and a molecular weight of 342.78 g/mol.
Owing to a steroid core, an amide group, a hydroxyl group, an ether linkage, chlorine substitution, 7-Chloro-3,4-dihydro-3-oxo-4-(phenylmethyl)-2-quinoxalinepropanoic acid is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 342.78 g/mol — guide the selection of appropriate sample preparation and analytical techniques. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
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 | C18H15ClN2O3 |
| Molecular Weight | 342.78 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| 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) | 12.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1984 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 2 |
Related Chloro Standards
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Recommended Standards
- 6-(Benzyloxy)-4-chloro-7-methoxyquinoline-3-carboxamide (CAS 476193-59-6)
- Benzotript (CAS 39544-74-6)
- 6-(2-Chlorobenzyl)-3-((3-methoxyphenyl)amino)-1,2,4-triazin-5(4H)-one (CAS 535982-63-9)
- Clorazepate EP Impurity C (CAS 5606-55-3)
- Ethyl 4-(difluoromethyl)-3-fluorobenzoate (CAS 1417459-60-9)
- (S)-3-Isopropylamino-1,2-propanediol (CAS 90742-94-2)
- 5-(1,3-Dioxo-1,3,3a,4,7,7a-hexahydro-2H-isoindol-2-yl)-2-hydroxybenzoic acid (CAS 954565-42-5)
- 5-Fluorosulfonylperfluoro(2-methyl-3-oxapentanoyl) fluoride (CAS 4089-57-0)
- 6-Chloro-8-fluorotetrazolo[1,5-a]pyridine (CAS 1255574-42-5)
- 5-Amino-2-phenyl-2H-[1,2,3]triazolo[4,5-d]pyrimidin-7(3H)-one (CAS 6295-27-8)
- Butocarboxim-d3 (CAS 1795141-34-2)
- 2-Chloro-1-[1-(2-methoxyethyl)-2,5-dimethyl-1H-pyrrol-3-yl]ethan-1-one (CAS 379241-47-1)
- 3-Chloro-5-cyclopropylpyrazolo[1,5-a]pyrimidine-7-carboxylic acid (CAS 1011354-08-7)
- Semaglutide-d5 (CAS CATO-C4X-2226153)
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