3-chloro-1-ethyl-pyrazole CAS 1254309-82-4
| CAS No. | 1254309-82-4 |
| Molecular Formula | C5H11ClN2 |
| Molecular Weight | 134.61 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
CATO supplies 3-chloro-1-ethyl-pyrazole (CAS 1254309-82-4), a certified reference material (molecular formula C5H11ClN2, MW 134.61 g/mol) for analytical method development and quality control.
Based on its molecular formula C5H11ClN2, 3-chloro-1-ethyl-pyrazole contains chlorine substitution; these features give the compound characteristic molecular-ion distribution patterns in mass spectrometry. The molecular weight of 134.61 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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 | 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.) | 1990 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 2 |
Related chloro Standards
- 3-Chloro-6-methylpyridazine (CAS 1121-79-5)
- 5-chloro-4-methylpyrimidine (CAS 54198-82-2)
- 2-Chloro-6-methyl-1,4-diazine 2-chloro-6-methyl-pyrazine 2-chloro-6-methylpyrazine 38557-71-0 (CAS 38557-71-0)
- 4-Chloro-2-methyltetrahydro-2H-pyran (CAS 116131-46-5)
- 5-Chloro-3-methyl-2-pentanone (CAS 1187-81-1)
- 4-chloro-3,3-dimethylbutan-2-one (CAS 13104-53-5)
- 2-Chloro-3,3-dimethylbutanal (CAS 13422-65-6)
- (S)-1-Chloro-5-hexen-2-ol (CAS 1374009-33-2)
Recommended Standards
- 4-(chloromethyl)-1-methyl-imidazole (CAS 112258-59-0)
- 3-(chloromethyl)-4-methyl-1H-pyrazole (CAS 1607024-74-7)
- 1-(2-chloroethyl)pyrazole (CAS 96450-53-2)
- 6-Chloro-2-hexanone (CAS 10226-30-9)
- [1-(tert-butoxycarbonylamino)cyclopropyl]methyl 4-methylbenzenesulfonate (CAS 1429913-33-6)
- 5-Bromo-2-chloro-6-cyclopropylnicotinonitrile (CAS 1221792-18-2)
- Tert-butyl 3-(((3-iodo-5-methylpyridin-2-yl)oxy)methyl)pyrrolidine-1-carboxylate (CAS 1203499-33-5)
- Perfluoro-4,4'-bipyridine (CAS 3511-91-9)
- Methyltris(tri-sec-butoxysilyloxy)silane (CAS 60711-47-9)
- N-Desmethyl Eletriptan (CAS 153525-55-4)
- Pomalidomide-amido-C3-COOH (CAS 2162120-77-4)
- 4-Dodecanoyl-3-methyl-1-phenyl-1H-pyrazol-5(4H)-one (CAS 58248-65-0)
- 3,5-Diphenyl-4,5-dihydro-1H-pyrazole-1-carbothioamide (CAS 29338-66-7)
- Palmitoyl Tripeptide-8 TFA salt (CAS 936544-53-5)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com