5-(4-methoxyphenyl)-1H-pyrazol-3-amine hydrochloride CAS 20737-63-7
| CAS No. | 20737-63-7 |
| Molecular Formula | C10H11N3O |
| Molecular Weight | N/A |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
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.
5-(4-methoxyphenyl)-1H-pyrazol-3-amine hydrochloride (CAS 20737-63-7), molecular formula C10H11N3OHCl and molecular weight 225.68 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C10H11N3OHCl, 5-(4-methoxyphenyl)-1H-pyrazol-3-amine hydrochloride 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 225.68 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
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 | C10H11N3O HCl |
| Molecular Weight | 225.68 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 tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1962 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 3 |
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- 8-[(S)-Hydroxy[4-benzyloxyphenyl]methyl]-1,4-dioxaspiro[4.5]decane-8-carboxylic Acid Ethyl Ester (CAS 182227-19-6)
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