3-Chloro-1-methyl-1,2-dihydroquinoxalin-2-one CAS 55687-06-4
| CAS No. | 55687-06-4 |
| Molecular Formula | C9H7ClN2O |
| Molecular Weight | 194.62 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.
3-Chloro-1-methyl-1,2-dihydroquinoxalin-2-one (CAS 55687-06-4), molecular formula C9H7ClN2O and molecular weight 194.62 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C9H7ClN2O, 3-Chloro-1-methyl-1,2-dihydroquinoxalin-2-one 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 194.62 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).
As a certified reference material (CRM), 3-Chloro-1-methyl-1,2-dihydroquinoxalin-2-one 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 | C9H7ClN2O |
| Molecular Weight | 194.62 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor, faint amine-like odor) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, 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 |
| Degree of Unsaturation (DBE) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1972 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 2 |
Related Chloro Standards
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- 4-Chloro-1-methyl-1,8-naphthyridin-2(1H)-one (CAS 1009360-86-4)
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Recommended Standards
- 3-Amino-7-chloroisoquinolin-1(2H)-one (CAS 76254-32-5)
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- 3-(Chloromethyl)quinazolin-4(3H)-one (CAS 99067-49-9)
- 3-Chloro-2-(1h-1,2,4-triazol-1-yl)aniline (CAS 869942-81-4)
- 5-(Difluoromethyl)pyridine-2-carbaldehyde (CAS 955112-64-8)
- Ethyl 2,5-dibromo-3-pyridinecarboxylate (CAS 1214375-74-2)
- 4-Chloro-5,6-dimethyl-2-(pyridin-3-yl)pyrimidine (CAS 204394-64-9)
- 4-(2-Fluorophenoxy)-2-methylbutan-2-ol (CAS 1392286-18-8)
- rel-(4aR,8aR,9aS,10aS)-Tetradecahydroacridine (CAS 16726-19-5)
- Sitafloxacin Impurity 17 (CAS 127199-00-2)
- Afatinib Impurity 76 (CAS CATO-C4X-100676)
- (2Z)-2-{[2-(trifluoromethyl)phenyl]methylidene}-2,3,4,9-tetrahydro-1H-carbazol-1-one (CAS 866149-09-9)
- (E)-3-(4-Fluorophenyl)-2-Propen-1-ol (CAS 124980-95-6)
- Semaglutide impurity 244(Fmoc-His(Fmoc)-Aib-OH) (CAS CATO-C4X-2226244)
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