Methyl 2-[(3S)-6-chloro-2-oxo-1H,2H,3H,4H-pyrido[2,3-b]pyrazin-3-yl]acetate CAS 1638603-68-5
| CAS No. | 1638603-68-5 |
| Molecular Formula | C10H10ClN3O3 |
| Molecular Weight | 255.66 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.
Methyl 2-[(3S)-6-chloro-2-oxo-1H,2H,3H,4H-pyrido[2,3-b]pyrazin-3-yl]acetate (CAS 1638603-68-5), molecular formula C10H10ClN3O3 and molecular weight 255.66 g/mol, is a CATO reference standard with documented purity and traceability.
Structurally, Methyl 2-[(3S)-6-chloro-2-oxo-1H,2H,3H,4H-pyrido[2,3-b]pyrazin-3-yl]acetate (C10H10ClN3O3) 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 7.0, corresponding to approximately 7 ring(s) or double-bond equivalent(s). With a molecular weight of 255.66 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.
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 | C10H10ClN3O3 |
| Molecular Weight | 255.66 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 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) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1993 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 3 |
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