1-Ethyl-4,5,6,7-tetrahydro-1H-pyrazolo[4,3-c]pyridine-3-carboxylic acid CAS 1256643-36-3
| CAS No. | 1256643-36-3 |
| Molecular Formula | C9H13N3O2 |
| Molecular Weight | N/A |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 249.69 g/mol gives 1-Ethyl-4,5,6,7-tetrahydro-1H-pyrazolo[4,3-c]pyridine-3-carboxylic acid distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
1-Ethyl-4,5,6,7-tetrahydro-1H-pyrazolo[4,3-c]pyridine-3-carboxylic acid (CAS 1256643-36-3) is a high-purity analytical reference standard with the molecular formula C9H13N3O2HClH2O and a molecular weight of 249.69 g/mol.
1-Ethyl-4,5,6,7-tetrahydro-1H-pyrazolo[4,3-c]pyridine-3-carboxylic acid (C9H13N3O2HClH2O) contains an amide group, a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution. It is notably hygroscopic, halogen substitution raises its density and boiling point, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
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 | C9H13N3O2 HCl H2O |
| Molecular Weight | 249.69 g/mol |
| Appearance | 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) | 3.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1990 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 3 |
Related Ethyl Standards
- 3-(Tetrahydro-2H-pyran-4-yl)benzoic acid (CAS 1000016-93-2)
- 10004-03-2 2-Phenyl-2,3,4,5-tetrahydro-1,4-benzoxazepine 7068AC C15H15NO (CAS 10004-03-2)
- 1-(tetrahydro-2H-pyran-2-yl)-1H-indazole-4-carboxylic acid (CAS 1000576-23-7)
- 1-(tetrahydro-2H-pyran-2-yl)-1H-indazole-5-carboxylic acid (CAS 1000576-28-2)
- 5-Methyl-5,6,7,8-tetrahydro-[1,3]dioxolo[4,5-g]isoquinoline (CAS 100077-51-8)
- 1-((Tetrahydro-2H-pyran-2-yl)methyl)-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazole (CAS 1000802-49-2)
- 4,5,6,7-Tetrahydro-1-phenyl-3-(trifluoromethyl)-1H-pyrazolo[4,3-c]pyridine (CAS 1000933-91-4)
- 7-Methyl-4,5,6,7-tetrahydro-1H-imidazo[4,5-c]pyridine (CAS 1001003-42-4)
Recommended Standards
- n-(2-Aminoethyl)cyclopropanesulfonamide (CAS 1241911-78-3)
- 1-(3,5-Difluoro-2-methoxyphenyl)-2,2,2-trifluoroethanone (CAS 1256467-27-2)
- N-(2-Hydroxy-2-methyl-3-(methylthio)propyl)-1-naphthamide (CAS 1396811-97-4)
- (6-Chloro-5-nitropyridin-3-yl)methanol (CAS 321845-12-9)
- Silver(II) Pyridine-2-carboxylate (CAS 14783-00-7)
- Ceftazidime Impurity 54 (CAS CATO-C4X-121254)
- 1-Bromohexane (CAS 111-25-1)
- 4-Chloro-6-cyclopropyl-5,6,7,8-tetrahydropyrido[4,3-d]pyrimidine (CAS 1256784-28-7)
- Bendroflumethiazide Impurity 1 (CAS CATO-C4X-33521)
- Semaglutide impurity 74 (CAS CATO-C4X-222674)
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