| CAS No. | 59994-27-3 |
| Molecular Formula | C10H11N3O |
| Molecular Weight | N/A |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Compared with other compounds in its class, the molecular weight of 225.68 g/mol gives 2-(4-Aminophenyl)-5-methyl-2,4-dihydro-3H-pyrazol-3-one hydrochloride distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
2-(4-Aminophenyl)-5-methyl-2,4-dihydro-3H-pyrazol-3-one hydrochloride (CAS 59994-27-3), molecular formula C10H11N3OHCl and molecular weight 225.68 g/mol, is a CATO reference standard with documented purity and traceability.
Structurally, 2-(4-Aminophenyl)-5-methyl-2,4-dihydro-3H-pyrazol-3-one hydrochloride (C10H11N3OHCl) contains a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage, chlorine substitution. The molecule exhibits a degree of unsaturation (DBE) of 6.0, corresponding to approximately 6 ring(s) or double-bond equivalent(s). With a molecular weight of 225.68 g/mol, it falls into the medium-molecular-weight range. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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.
CATO manufactures 2-(4-Aminophenyl)-5-methyl-2,4-dihydro-3H-pyrazol-3-one hydrochloride 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.
| 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.) | 1974 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 3 |