2,3-Dichloro-5,8-dimethoxyquinoxaline CAS 19506-33-3
| CAS No. | 19506-33-3 |
| Molecular Formula | C10H8Cl2N2O2 |
| Molecular Weight | 259.09 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 259.09 g/mol gives 2,3-Dichloro-5,8-dimethoxyquinoxaline distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
2,3-Dichloro-5,8-dimethoxyquinoxaline (CAS 19506-33-3), molecular formula C10H8Cl2N2O2 and molecular weight 259.09 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C10H8Cl2N2O2, 2,3-Dichloro-5,8-dimethoxyquinoxaline contains a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage, chlorine substitution; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 259.09 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
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), 2,3-Dichloro-5,8-dimethoxyquinoxaline 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 | C10H8Cl2N2O2 |
| Molecular Weight | 259.09 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor, faint amine-like odor, low volatility) |
| 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 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) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1962 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 2 |
Related Dichloro Standards
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Recommended Standards
- 5-Iodo-6-methylindoline (CAS 1935509-31-1)
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- 2-(Methoxymethyl)Benzene-1,4-Diamine (CAS 337906-36-2)
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- 2,2'-((Cyclohexane-1,2-diylbis(azanylylidene))bis(methanylylidene))diphenol (CAS 64346-55-0)
- 5-(Bromomethyl)-4-methyl-2-phenylthiazole (CAS 181424-15-7)
- 2-Hydroxy-3-Methoxybenzenesulfonic Acid Potassium Salt (CAS 859188-04-8)
- Levocarnitine Impurity 6 (CAS 2788-28-5)
- 1-(aminomethyl)-3-ethoxy-2,2-dimethylcyclobutan-1-ol hydrochloride (CAS 1786251-55-5)
- 5,7-Dimethoxy-[1,2,4]triazolo[1,5-α]pyrimidin-2-amine (CAS 13223-43-3)
- (2-Chloro-4-fluoro-3-methoxyphenyl)(4-methylpiperazin-1-yl)methanone (CAS 2586126-49-8)
- Semaglutide impurity 57 (CAS 2773558-06-6)
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