4-(1h-Pyrazol-3-yl)aniline hydrochloride CAS 698998-67-3
| CAS No. | 698998-67-3 |
| Molecular Formula | C9H9N3 |
| Molecular Weight | N/A |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
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.
4-(1h-Pyrazol-3-yl)aniline hydrochloride (CAS 698998-67-3), molecular formula C9H9N3HCl and molecular weight 195.65 g/mol, is a CATO reference standard with documented purity and traceability.
Owing to a nitrogen-containing heterocyclic scaffold, a nitrile group, chlorine substitution, 4-(1h-Pyrazol-3-yl)aniline hydrochloride is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 195.65 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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 | 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.) | 1985 |
| 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
- (1-{4-[3-Chloro-5-(trifluoromethyl)pyridin-2-yl]piperazin-1-yl}-2-nitroethenyl)(methyl)amine (CAS 1823194-64-4)
- 2,3-Dimethyl-3H-imidazo[4,5-b]pyridine-6-carboxylic acid (CAS 927801-46-5)
- Methyl 1,4-dioxo-1,2,3,4-tetrahydrophthalazine-5-carboxylate (CAS 1707667-86-4)
- 4,4-Dimethylpent-2-enal (CAS 22597-46-2)
- Amino-PEG4-t-butyl ester (CAS 581065-95-4)
- N-(2-Aminophenyl)-4-((5-nitro-2H-indazol-2-yl)methyl)benzamide (CAS 920314-33-6)
- 2-(((3-Methoxypyrazin-2-yl)methyl)amino)ethanol (CAS 1353948-01-2)
- Linezolid Impurity 14 (PNU142586) (CAS 368891-70-7)
- 2-Amino-3-(2,5-difluorophenyl)propanoic acid (CAS 32133-38-3)
- Neuroendocrine Regulatory Peptide-1 (human) (H-6622.1000) (CAS 954420-50-9)
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