Ethyl 4-oxo-4,9a-dihydro-1H-pyrimido[1,2-a]pyrimidine-3-carboxylate CAS 40519-95-7
| CAS No. | 40519-95-7 |
| Molecular Formula | C10H11N3O3 |
| Molecular Weight | 221.21 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Owing to an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage, Ethyl 4-oxo-4,9a-dihydro-1H-pyrimido[1,2-a]pyrimidine-3-carboxylate is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 221.21 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
Ethyl 4-oxo-4,9a-dihydro-1H-pyrimido[1,2-a]pyrimidine-3-carboxylate (CAS 40519-95-7), molecular formula C10H11N3O3 and molecular weight 221.21 g/mol, is a CATO reference standard with documented purity and traceability.
This reference standard is suitable for quantitative analysis on major chromatographic platforms including HPLC, GC, LC-MS/MS, and GC-MS, serving as an external calibration standard or a system suitability test reference material.
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 | C10H11N3O3 |
| Molecular Weight | 221.21 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (faint amine-like odor) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| 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 |
| Degree of Unsaturation (DBE) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1968 |
| Nitrogen Atoms | 3 |
Recommended Standards
- Ethyl 3-phenyl-1,4,2-dioxazole-5-carboxylate (CAS 37829-38-2)
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- ETHYL 3-OXO-3,4-DIHYDRO-2H-BENZO[B][1,4]OXAZINE-2-CARBOXYLATE (CAS 24011-61-8)
- ethyl 5-methyl-4-oxo-3H,4H-pyrrolo[2,1-f][1,2,4]triazine-6-carboxylate (CAS 427878-70-4)
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- Methyl 3-[(2-methoxy-2-oxoethyl)sulfanyl]thiophene-2-carboxylate (CAS 177974-11-7)
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- tert-Butyl 3-((4-(3-(((methylsulfonyl)oxy)methyl)azetidin-1-yl)phenyl)sulfonyl)azetidine-1-carboxylate (CAS 2173582-20-0)
- 1-(2-Phenylcyclopropyl)ethan-1-amine hydrochloride (CAS 1212189-77-9)
- Trimethyl Orthopropionate (CAS 24823-81-2)
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