Ethyl 5-chloro-6-methoxypyrazolo[1,5-a]pyrimidine-3-carboxylate CAS 2359663-72-0
| CAS No. | 2359663-72-0 |
| Molecular Formula | C10H10ClN3O3 |
| Molecular Weight | 255.66 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Ethyl 5-chloro-6-methoxypyrazolo[1,5-a]pyrimidine-3-carboxylate (CAS 2359663-72-0), molecular formula C10H10ClN3O3 and molecular weight 255.66 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C10H10ClN3O3, Ethyl 5-chloro-6-methoxypyrazolo[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 255.66 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
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.) | 1999 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 3 |
Related Ethyl Standards
- 3-(4-Chloro-1H-pyrazolo[3,4-d]pyrimidin-1-yl)benzonitrile (CAS 1155075-44-7)
- 2-Chloro-N-{1,7-dimethyl-4-oxo-3h,4h-furo[3,4-d]pyridazin-5-yl}acetamide (CAS 852389-06-1)
- 4-((2-Chloro-3H-purin-6-yl)amino)butanoic acid (CAS 919740-31-1)
- 5-Chloro-6H-anthra[1,9-cd]isoxazol-6-one (CAS 70730-92-6)
- Ethyl 2-chloro-8-methoxyimidazo[1,2-b]pyridazine-7-carboxylate (CAS 2577171-74-3)
- Methyl 2-(6-chloro-3-oxo-3,4-dihydro-2H-benzo[b][1,4]oxazin-2-yl)acetate (CAS 104662-84-2)
- 4-(3-Chloro-2-fluorophenoxy)-3-fluoroaniline (CAS 1206593-32-9)
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Recommended Standards
- Ethyl 7-(chloromethyl)-5-hydroxypyrazolo[1,5-a]pyrimidine-3-carboxylate (CAS 832740-93-9)
- Ethyl 2-(2-amino-6-chloro-9H-purin-9-yl)acetate (CAS 213552-03-5)
- Methyl 2-(3-chloropyridin-2-yl)-5-oxopyrazolidine-3-carboxylate (CAS 774600-50-9)
- Ganciclovir EP Impurity A (CAS 1797982-93-4)
- 1-(2-Fluorobenzyl)-1H-pyrazolo[3,4-b]pyridine-3-carboxylic acid (CAS 956011-26-0)
- 1,4-Dioxa-7,10-diazacyclododecane (CAS 60350-13-2)
- N-(2-Hydroxyethyl) Pseudoephedrine-d3 (CAS 1330277-60-5)
- tert-Butyl 2-imino-2λ6-thia-6-azaspiro[3.3]heptane-6-carboxylate 2-oxide (CAS 2225816-09-9)
- 2-((3-Cyano-6-phenyl-4-(trifluoromethyl)-5,6,7,8-tetrahydroquinolin-2-yl)thio)-N-(4-methyloxazol-2-yl)acetamide (CAS 664999-17-1)
- 2-(Diethylamino)ethyl 2-cyclohexyl-2-phenylacetate (CAS 1679-76-1)
- 5-Methyl-2-(quinolin-6-yl)thiazole (CAS 810690-55-2)
- Dronedarone Impurity 58 (CAS 141645-20-7)
- 3,4-Bis(chloromethyl)pyridine (CAS 38070-81-4)
- Semaglutide impurity 290 (CAS CATO-C4X-2226290)
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