5-(chloromethyl)-1-methyl-1H-pyrazole CAS 84547-63-7
| CAS No. | 84547-63-7 |
| Molecular Formula | C5H11ClN2 |
| Molecular Weight | 134.61 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The molecular framework of 5-(chloromethyl)-1-methyl-1H-pyrazole (C5H11ClN2) is characterized by chlorine substitution. In reversed-phase chromatography, its retention is governed primarily by the protonation state of its nitrogen-containing groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
CATO supplies 5-(chloromethyl)-1-methyl-1H-pyrazole (CAS 84547-63-7), a certified reference material (molecular formula C5H11ClN2, MW 134.61 g/mol) for analytical method development and quality control.
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 | C5H11ClN2 |
| Molecular Weight | 134.61 g/mol |
| 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 | Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 1.0 |
| CAS Registry Year (est.) | 1981 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 2 |
Related chloromethyl Standards
- 4-(chloromethyl)-1-methyl-imidazole (CAS 112258-59-0)
- 3-(chloromethyl)-4-methyl-1H-pyrazole (CAS 1607024-74-7)
- 4-(chloromethyl)-1-methyl-1H-pyrazole (CAS 735241-98-2)
- 4-(chloromethyl)pyridazine (CAS 94693-72-8)
- 5-(chloromethyl)-1-methyl-imidazole (CAS 89180-90-5)
- 3-(Chloromethyl)-4-methyltetrahydrofuran (CAS 1202400-53-0)
- 2-(Chloromethyl)tetrahydro-2H-pyran (CAS 18420-41-2)
- 3-(Chloromethyl)-3-ethyloxetane (CAS 2177-22-2)
Recommended Standards
- 5-(2-chloroethyl)-1H-pyrazole (CAS 57245-85-9)
- 5-chloro-4-methylpyrimidine (CAS 54198-82-2)
- 5-Chloropentanimidamide (CAS 775555-06-1)
- 4-(2-chloroethyl)-1H-pyrazole (CAS 438475-37-7)
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