ethyl 5-chloro-7-oxo-4H-pyrazolo[1,5-a]pyrimidine-3-carboxylate CAS 2394830-31-8
| CAS No. | 2394830-31-8 |
| Molecular Formula | C9H8ClN3O3 |
| Molecular Weight | 241.63 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.
ethyl 5-chloro-7-oxo-4H-pyrazolo[1,5-a]pyrimidine-3-carboxylate (CAS 2394830-31-8), molecular formula C9H8ClN3O3 and molecular weight 241.63 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C9H8ClN3O3, ethyl 5-chloro-7-oxo-4H-pyrazolo[1,5-a]pyrimidine-3-carboxylate 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 241.63 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), ethyl 5-chloro-7-oxo-4H-pyrazolo[1,5-a]pyrimidine-3-carboxylate 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 | C9H8ClN3O3 |
| Molecular Weight | 241.63 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.) | 1999 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 3 |
Related ethyl Standards
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- 7-Chloro-4,6-dimethoxy-2,3-dihydro-1H-indole-2,3-dione (CAS 1164251-88-0)
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- Ethyl 7-chloro-5-hydroxyimidazo[1,2-c]pyrimidine-2-carboxylate (CAS 1639974-70-1)
- 2-(5-Chloro-7-methoxybenzo[d]isoxazol-3-yl)acetic acid (CAS 1708288-36-1)
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Recommended Standards
- Ethyl 5-chloro-6-hydroxypyrazolo[1,5-a]pyrimidine-3-carboxylate (CAS 2359663-69-5)
- Ethyl 6-chloro-3-oxo-2,3-dihydroimidazo[1,5-a]pyrazine-1-carboxylate (CAS 2512865-94-8)
- Ethyl 2-chloro-8-hydroxyimidazo[1,2-b]pyridazine-7-carboxylate (CAS 2434602-64-7)
- Methyl (E)-3-(4-Chloro-3-nitrophenyl)acrylate (CAS 877065-30-0)
- (4-Hexylphenyl)hydrazine hydrochloride (CAS 126062-51-9)
- 4-Ethyl-3-(methylsulfonyl)-4H-1,2,4-triazole (CAS 1363210-23-4)
- 3-(2-(Pyrrolidin-1-yl)ethoxy)benzonitrile (CAS 938366-34-8)
- 4-(S-Methylsulfonimidoyl)benzonitrile (CAS 1621962-30-8)
- 4-Bromo-7-methoxy-1H-indole-3-carbaldehyde (CAS 1227572-66-8)
- Methyl 3-vinylbenzoate (CAS 38383-50-5)
- N-(4-(Bromomethyl)phenyl)acetamide (CAS 66047-05-0)
- Methyl 3-(4-methoxyphenyl)isoxazole-4-carboxylate (CAS 223476-82-2)
- 5-(4-(4-Chlorophenoxy)phenyl)isoxazole-3-carboxylic acid (CAS 925001-05-4)
- Custom peptides (CAS CATO-CPTD788509)
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