5-(2-Chloroethyl)-1,3-dimethyl-1H-pyrazole CAS 54055-32-2
| CAS No. | 54055-32-2 |
| Molecular Formula | C7H11ClN2 |
| Molecular Weight | 158.63 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of 5-(2-Chloroethyl)-1,3-dimethyl-1H-pyrazole is closely related to a nitrile group, chlorine substitution in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
5-(2-Chloroethyl)-1,3-dimethyl-1H-pyrazole (CAS 54055-32-2) is a high-purity analytical reference standard with the molecular formula C7H11ClN2 and a molecular weight of 158.63 g/mol.
5-(2-Chloroethyl)-1,3-dimethyl-1H-pyrazole (C7H11ClN2) contains 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. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
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 | C7H11ClN2 |
| Molecular Weight | 158.63 g/mol |
| Appearance | 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) | 3.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1972 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 2 |
Related Chloroethyl Standards
- 1-(1-Chloroethyl)-3,5-dimethyl-1H-pyrazole (CAS 102864-89-1)
- 1-(2-chloroethyl)-2-ethyl-1H-imidazole hydrochloride 112258-51-2 (CAS 112258-51-2)
- 4-(2-Chloroethyl)-1-ethyl-1h-pyrazole (CAS 1249134-41-5)
- 1-(2-Chloroethyl)-3,5-dimethyl-1h-pyrazole (CAS 38460-08-1)
- 3-(2-Chloroethyl)-1,5-dimethyl-1H-pyrazole (CAS 54055-31-1)
- 4-(2-Chloroethyl)-3,5-dimethyl-1H-pyrazole (CAS 79379-05-8)
- 5-(1-Chloroethyl)-1,3-dimethyl-1H-pyrazole (CAS 57527-85-2)
- 1-(2-Chloroethyl)-2-fluorobenzene (CAS 119779-12-3)
Recommended Standards
- 5-(Chloromethyl)-1-isopropyl-1H-imidazole (CAS 776290-49-4)
- 4-Chloro-5-isopropyl-3-methyl-1H-pyrazole (CAS 855344-11-5)
- 5-(Chloromethyl)-1-propyl-1H-imidazole (CAS 497856-40-3)
- 4-chloro-3-methylpyridine-2-carbonitrile (CAS 886372-07-2)
- 2-Fluoro-5-methoxypyridine-4-methanol (CAS 1227573-98-9)
- 2-Ethynyloxazole-5-carboxylic acid (CAS 1391828-78-6)
- 1-(4-Carboxyphenyl)-2,4,6-tri-p-tolylpyridin-1-ium perchlorate (CAS 76191-63-4)
- 2-(chloromethyl)-5-ethoxypyridine hydrochloride (CAS 133238-81-0)
- 5-Bromo-2-(trifluoromethyl)phenol (CAS 1121585-15-6)
- N-(pyrimidin-5-ylmethyl)acetamide (CAS 1588441-38-6)
- Methyl 7-bromoisoquinoline-3-carboxylate (CAS 1824333-73-4)
- (4-Bromoimidazol-1-yl)-acetic acid tert-butyl ester (CAS 877399-17-2)
- N-phenyl-1,3,5-triazin-2-amine (CAS 4040-07-7)
- Semaglutide impurity 199 (CAS CATO-C4X-2226199)
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