5-Chloro-1-ethyl-3-methyl-1h-pyrazole CAS 31272-06-7
| CAS No. | 31272-06-7 |
| Molecular Formula | C6H9ClN2 |
| Molecular Weight | 144.60 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
5-Chloro-1-ethyl-3-methyl-1h-pyrazole (C6H9ClN2) 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. 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).
5-Chloro-1-ethyl-3-methyl-1h-pyrazole (CAS 31272-06-7), molecular formula C6H9ClN2 and molecular weight 144.60 g/mol, is a CATO reference standard with documented purity and traceability.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
As a certified reference material (CRM), 5-Chloro-1-ethyl-3-methyl-1h-pyrazole meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
Physical & Chemical Properties
| Molecular Formula | C6H9ClN2 |
| Molecular Weight | 144.60 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 | 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.) | 1965 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 2 |
Related Chloro Standards
- 3-Chloro-1,4,5-trimethyl-1H-pyrazole (CAS 1036991-59-9)
- 2-Chloro-1-isopropyl-1h-imidazole (CAS 1053655-72-3)
- 4-Chloro-1-ethyl-3-methyl-1H-pyrazole (CAS 1172461-39-0)
- 4-Chloro-1-ethyl-5-methyl-1H-pyrazole (CAS 1172915-66-0)
- 6-chloro-6-methylbicyclo[3.1.0]hexan-2-one (CAS 117341-93-2)
- 5-chloro-1,3,4-trimethyl-1H-pyrazole (CAS 1195585-81-9)
- 3-Chloro-1-ethyl-5-methyl-1H-pyrazole (CAS 1195637-10-5)
- 4-Chloro-1-propyl-1H-pyrazole (CAS 1204901-63-2)
Recommended Standards
- 5-Chloro-1-ethyl-2-methyl-1h-imidazole (CAS 4897-22-7)
- 5-Chloro-3-ethyl-1-methyl-1h-pyrazole (CAS 29938-63-4)
- 5-(Chloromethyl)-1-ethyl-1H-imidazole (CAS 790654-82-9)
- Cyclohexenyl-1-carbonyl Chloride (CAS 36278-22-5)
- 2-{[(2-aminoethyl)sulfanyl]methyl}benzonitrile hydrochloride (CAS 1052540-31-4)
- 1-(5-Chloro-2-ethoxyphenyl)-N-methylmethanamine hydrochloride (CAS 1048947-97-2)
- Oxetane-3-sulfonamide (CAS 1335234-13-3)
- 1-[(3S)-3-Aminopyrrolidin-1-yl]-2-methylpropan-2-ol (CAS 1568206-90-5)
- 3-(2-Fluoro-6-iodophenyl)-1,2,4-oxadiazole (CAS 1262412-81-6)
- 3-(Furan-2-yl)-6-phenyl-7H-[1,2,4]triazolo[3,4-b][1,3,4]thiadiazine (CAS 183536-45-0)
- Molsidomine Impurity 8 (CAS 1233340-43-6)
- 3-Chloro-5-ethoxy-4-methoxybenzoic acid (CAS 90919-60-1)
- Methyl 5-((3-methoxyphenyl)carbamoyl)-4-methyl-2-(3-methylbenzamido)thiophene-3-carboxylate (CAS 335406-05-8)
- [y-Glu15]-Semaglutide Impurity 134 (CAS CATO-C4X-2226134)
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