(3-Ethyl-1-methyl-1h-pyrazol-5-yl)methanesulfonyl chloride CAS 1493237-91-4
| CAS No. | 1493237-91-4 |
| Molecular Formula | C7H11ClN2O2S |
| Molecular Weight | 222.69 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
(3-Ethyl-1-methyl-1h-pyrazol-5-yl)methanesulfonyl chloride (CAS 1493237-91-4) is a high-purity analytical reference standard with the molecular formula C7H11ClN2O2S and a molecular weight of 222.69 g/mol.
Owing to an amide group, a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution, (3-Ethyl-1-methyl-1h-pyrazol-5-yl)methanesulfonyl chloride is typically white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 222.69 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).
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
CATO manufactures (3-Ethyl-1-methyl-1h-pyrazol-5-yl)methanesulfonyl chloride under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C7H11ClN2O2S |
| Molecular Weight | 222.69 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry, 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; Hygroscopic; reseal immediately after opening; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 3.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1992 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 1 |
Recommended Standards
- (1-Propyl-1h-imidazol-5-yl)methanesulfonyl chloride (CAS 1463418-95-2)
- (1-Ethyl-3-methyl-1h-pyrazol-5-yl)methanesulfonyl chloride (CAS 1498537-01-1)
- (1-Isopropyl-1h-imidazol-2-yl)methanesulfonyl chloride (CAS 1420882-15-0)
- 2-chlorothieno[2,3-d]pyrimidine-6-carboxylic acid (CAS 1504800-73-0)
- n-Benzyl-5-bromo-3-methylbenzofuran-2-carboxamide (CAS 714261-41-3)
- 2-(3,4-Dimethylthiophen-2-yl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane (CAS 1384127-60-9)
- (2,4-Dimethoxyphenyl)(methyl)sulfane (CAS 5633-61-4)
- 1-Butyl-3-(2-chloro-6-(1H-pyrrol-1-yl)benzyl)urea (CAS 866010-58-4)
- Dasatinib Impurity 54 (CAS 127116-19-2)
- Lurbinectedin Impurity 14 (CAS CATO-C4X-311414)
- 1-(4-Hydroxy-3-iodo-5-methoxyphenyl)ethanone (CAS 103440-59-1)
- (2R,3R,4R)-5,5-bis(benzylthio)pentane-1,2,3,4-tetraol (CAS 64780-55-8)
- 2,5-Dimethyl-1-pyrrolidineethanamine (CAS 33304-27-7)
- Tau Peptide (245-274) (Repeat 1 Domain) trifluoroacetate salt (CAS 1428134-39-7)
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