5,7-Dichloro-2,3-diphenylquinoxaline CAS 5227-63-4
| CAS No. | 5227-63-4 |
| Molecular Formula | C20H12Cl2N2 |
| Molecular Weight | 351.23 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of 5,7-Dichloro-2,3-diphenylquinoxaline is closely related to a nitrogen-containing heterocyclic scaffold, a nitrile group, chlorine substitution in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
5,7-Dichloro-2,3-diphenylquinoxaline (CAS 5227-63-4) is a high-purity analytical reference standard with the molecular formula C20H12Cl2N2 and a molecular weight of 351.23 g/mol.
Structurally, 5,7-Dichloro-2,3-diphenylquinoxaline (C20H12Cl2N2) contains a nitrogen-containing heterocyclic scaffold, a nitrile group, chlorine substitution. The molecule exhibits a degree of unsaturation (DBE) of 15.0, corresponding to approximately 15 ring(s) or double-bond equivalent(s). With a molecular weight of 351.23 g/mol, it falls into the moderately-high-molecular-weight range. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
As a certified reference material (CRM), 5,7-Dichloro-2,3-diphenylquinoxaline 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.
Physical & Chemical Properties
| Molecular Formula | C20H12Cl2N2 |
| Molecular Weight | 351.23 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor, low volatility) |
| 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) | 15.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1958 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 2 |
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Recommended Standards
- 3,3-Bis((6-chloropyridin-3-yl)methyl)pentane-2,4-dione (CAS 865658-84-0)
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- N-(4-Chlorophenyl)-4-(6-chloro-2-pyridinyl)tetrahydro-1(2H)-pyrazinecarboxamide (CAS 339107-26-5)
- 2-(2,6-Dichlorophenoxy)-N-(4-oxo-2-thioxothiazolidin-3-yl)acetamide (CAS 866154-59-8)
- 5-((Ethylthio)methyl)pyrimidin-2-amine (CAS 37795-59-8)
- (S)-7-chloroisochroman-4-amine hydrochloride (CAS 1956436-63-7)
- 2-Methyl-2-((tetrahydro-2H-pyran-4-yl)sulfonyl)propanoic acid (CAS 1017539-95-5)
- 2-(6-Acetyl-1H-indol-3-yl)acetic acid (CAS 81223-95-2)
- 3-(((Tert-butyldimethylsilyl)oxy)methyl)cyclobutan-1-one (CAS 939775-62-9)
- (3-Methyl-2,5-dihydro-1H-pyrrol-1-yl)(phenyl)methanone (CAS 197155-50-3)
- 2,3,4,9-Tetrahydro-3,9,9-trimethyl-6-pentyl-1H-xanthen-8-ol (CAS 18110-59-3)
- N-(4-Methylpyridin-2-yl)-2-phenyl-2H-tetrazole-5-carboxamide (CAS 1396783-98-4)
- 2-(pyrrolidin-1-yl)ethanethioamide (CAS 760898-91-7)
- Hexapeptide-9 (CAS 1228371-11-6)
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