4-(1h-Pyrazol-1-yl)aniline hydrochloride CAS 913848-94-9
| CAS No. | 913848-94-9 |
| Molecular Formula | C9H9N3 |
| Molecular Weight | N/A |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including 4-(1h-Pyrazol-1-yl)aniline hydrochloride.
4-(1h-Pyrazol-1-yl)aniline hydrochloride (CAS 913848-94-9), molecular formula C9H9N3HCl and molecular weight 195.65 g/mol, is a CATO reference standard with documented purity and traceability.
4-(1h-Pyrazol-1-yl)aniline hydrochloride (C9H9N3HCl) contains a nitrogen-containing heterocyclic scaffold, a nitrile group, chlorine substitution. Halogen substitution raises its density and boiling point; 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.
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 | C9H9N3 HCl |
| Molecular Weight | 195.65 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.) | 1987 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 3 |
Related h Standards
- 3-(1H-Pyrazol-4-yl)benzoic acid (CAS 1002535-21-8)
- 1-(3-(1H-Pyrazol-1-yl)phenyl)-N,N-dimethylmethanamine (CAS 1003993-34-7)
- 3-(4-(1H-Pyrazol-1-yl)phenyl)-6-(methylthio)pyridazine (CAS 1004184-50-2)
- 1-((1h-Pyrazol-1-yl)methyl)-1h-pyrazole-3-carbohydrazide (CAS 1004192-91-9)
- 2-((6-(4-(1H-Pyrazol-1-yl)phenyl)pyridazin-3-yl)thio)-N-(5-methylisoxazol-3-yl)acetamide (CAS 1004439-73-9)
- 3-(1-(1H-Pyrazol-4-yl)propyl)-2-thioxoimidazolidin-4-one (CAS 1004643-56-4)
- 1-(5-methyl-pyraZol-1-yl)-propan-2-one (CAS 1004643-66-6)
- 1-((1H-pyrazol-1-yl)methyl)-1H-pyrazole-3-carboxylic acid (CAS 1005631-12-8)
Recommended Standards
- Afatinib Impurity 35 (CAS 6943-17-5)
- 1-(4-Phenyl-2-thiazolyl)-1-tert-butyl-3,3-dimethyl-5-hydroxy[4,5]-bipyrazol (CAS 321998-06-5)
- 3-Aminothietane 1,1-Dioxide (CAS 88511-13-1)
- 2-{[5-(furan-2-yl)-4-phenyl-4h-1,2,4-triazol-3-yl]sulfanyl}acetic acid (CAS 307327-52-2)
- 3,5-Dichloro-4-(4-phenylpiperazin-1-yl)aniline (CAS 1708027-03-5)
- 4-Cyclopropoxy-3-iodopicolinaldehyde (CAS 1243359-77-4)
- 2-(4-Methoxyphenyl)-4-oxo-4H-chromen-6-yl dihydrogen phosphate (CAS 88543-71-9)
- 4-Iodo-5-nitro-1H-imidazole (CAS 76529-48-1)
- 3-(tert-Butyl)-5-hydroxy-N,N-dimethylbenzamide (CAS 1243366-87-1)
- Semaglutide impurity 247 (CAS CATO-C4X-2226247)
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