3-Ethylpyrazolo[1,5-a]pyrimidine-5-carboxylic acid CAS 1783663-29-5
| CAS No. | 1783663-29-5 |
| Molecular Formula | C9H9N3O2 |
| Molecular Weight | 191.19 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
CATO manufactures 3-Ethylpyrazolo[1,5-a]pyrimidine-5-carboxylic acid under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
3-Ethylpyrazolo[1,5-a]pyrimidine-5-carboxylic acid (CAS 1783663-29-5) is a high-purity analytical reference standard with the molecular formula C9H9N3O2 and a molecular weight of 191.19 g/mol.
3-Ethylpyrazolo[1,5-a]pyrimidine-5-carboxylic acid (C9H9N3O2) contains an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage. It is notably hygroscopic, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. 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).
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.
Physical & Chemical Properties
| Molecular Formula | C9H9N3O2 |
| Molecular Weight | 191.19 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 DMSO, DMF, methanol |
| 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.) | 1994 |
| Nitrogen Atoms | 3 |
Related Ethylpyrazolo Standards
- 2-Ethylpyrazolo[1,5-a]pyrimidine-6-carboxylic acid (CAS 1707575-91-4)
- 3-Ethylpyrazolo[1,5-a]pyrimidine-6-carboxylic acid (CAS 1779128-22-1)
- 2-Ethylpyrazolo[1,5-a]pyridine-3-carboxylic acid (CAS 1312585-82-2)
- 3-Ethylpyrazolo[1,5-a]pyrimidine-5,7(4H,6H)-dione (CAS 779353-63-8)
- 4-Ethylpyrazolo[1,5-a]pyrimidin-7(4H)-one (CAS 55197-18-7)
- 5-Ethylpyrazolo[1,5-a]pyrimidin-7(4H)-one (CAS 244127-30-8)
- 2-Ethylpyrazolo[1,5-a]pyrimidin-6-amine (CAS 1356003-22-9)
- 3-Ethylpyrazolo[1,5-a]pyrimidin-6-amine (CAS 1707713-94-7)
Recommended Standards
- 6-ethyl-1H-pyrazolo[4,3-b]pyridine-3-carboxylic acid (CAS 1782820-02-3)
- Methyl 3-aminoimidazo[1,5-a]pyridine-1-carboxylate (CAS 1783663-32-0)
- 6,7,8,9-Tetrahydropyrazino[1,2-e]purin-4(1H)-one (CAS 17796-21-3)
- 6-Amino-1-methyl-1H-indazole-3-carboxylic acid (CAS 1783693-90-2)
- 2-(1-Ethyl-1h-pyrazol-4-yl)propan-2-ol (CAS 1249801-97-5)
- 3-[4-(1,1-Dimethylheptyl)-2-(phenylmethoxy)phenyl]cyclohexanone (CAS 70434-13-8)
- Methyl 2-(3-methylbenzamido)-4,5,6,7-tetrahydrobenzo[b]thiophene-3-carboxylate (CAS 328023-47-8)
- 4-(3-(2-Chlorophenyl)-3-methyl-2,5-dioxopyrrolidin-1-yl)benzenesulfonamide (CAS 65116-66-7)
- (E)-1-(4-((3-(4-methoxyphenyl)-3-oxoprop-1-en-1-yl)amino)phenyl)piperidin-4-one (CAS 400079-59-6)
- 2-Bromo-7-methylbenzo[d]thiazole, 97% (CAS 3622-44-4)
- 5-Bromo-N-(piperidin-3-yl)picolinamide hydrochloride (CAS 1590800-47-7)
- (4aR,7aR)-tert-Butyl hexahydropyrrolo[3,4-b][1,4]oxazine-6(2H)-carboxylate (CAS 1383428-22-5)
- Ethyl 3-(2,3-dihydro-1H-inden-2-yl)-3-oxopropanoate (CAS 889957-62-4)
- Tirzepatide Impurity 13 (CAS CATO-C4X-324013)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com