4-Chloro-N-(2-(3,5-dimethyl-1H-pyrazole-1-carbonyl)thiophen-3-yl)-N-ethylbenzenesulfonamide CAS 1325305-88-1
| CAS No. | 1325305-88-1 |
| Molecular Formula | C18H18ClN3O3S2 |
| Molecular Weight | 423.94 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 423.94 g/mol gives 4-Chloro-N-(2-(3,5-dimethyl-1H-pyrazole-1-carbonyl)thiophen-3-yl)-N-ethylbenzenesulfonamide distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
4-Chloro-N-(2-(3,5-dimethyl-1H-pyrazole-1-carbonyl)thiophen-3-yl)-N-ethylbenzenesulfonamide (CAS 1325305-88-1), molecular formula C18H18ClN3O3S2 and molecular weight 423.94 g/mol, is a CATO reference standard with documented purity and traceability.
4-Chloro-N-(2-(3,5-dimethyl-1H-pyrazole-1-carbonyl)thiophen-3-yl)-N-ethylbenzenesulfonamide (C18H18ClN3O3S2) contains a steroid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage, chlorine substitution. It is notably hygroscopic, halogen substitution raises its density and boiling point, the carboxyl group imparts weak acidity; 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.
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.
As a certified reference material (CRM), 4-Chloro-N-(2-(3,5-dimethyl-1H-pyrazole-1-carbonyl)thiophen-3-yl)-N-ethylbenzenesulfonamide 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 | C18H18ClN3O3S2 |
| Molecular Weight | 423.94 g/mol |
| Purity | 97%+ |
| Storage | Store in a cool place (≤25°C), protect from light, keep sealed and dry |
| 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) | 11.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1991 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 3 |
| Sulfur Atoms | 2 |
Related Chloro Standards
- 3-Chloro-N-[2-(3,5-dimethyl-1H-pyrazole-1-carbonyl)thiophen-3-yl]-N,4-dimethylbenzene-1-sulfonamide (CAS 1325304-09-3)
- 1147422-73-8 4-(2-Chloro-6-((4-(tetrahydrofuran-3-yl)piperazin-1-yl)methyl)thieno[3,2-d]pyrimidin-4-yl)morpholine 9503AC C19H26ClN5O2S (CAS 1147422-73-8)
- 5-Chloro-N-(2-hydroxy-3-((3-methyl-4-(3-oxomorpholino)phenyl)amino)propyl)thiophene-2-carboxamide (CAS 482306-16-1)
- 1076199-83-1 2,2'-[[[2-Chloro-9-(1-methylethyl)-9H-purin-6-yl]imino]bis(methylene)]bis-phenol 2-Chloro-6-[N,N-di(2-hydroxybenzyl)amino]-9-isopropylpurine (CAS 1076199-83-1)
- 4-Chloro-2-(2-((6-nitrobenzo[d]thiazol-2-yl)thio)acetamido)benzoic acid (CAS 730965-99-8)
- N'-(4-Chloro-3-nitrobenzylidene)-4-((4-methylbenzyl)oxy)benzohydrazide (CAS 320423-64-1)
- 3-(2-{[3-chloro-5-(trifluoromethyl)pyridin-2-yl]sulfanyl}phenyl)-1-phenylurea (CAS 338773-30-1)
- (2Z)-3-{6-chloro-2-phenylimidazo[1,2-a]pyridin-3-yl}-2-[3-(trifluoromethyl)phenyl]prop-2-enenitrile (CAS 478248-60-1)
Recommended Standards
- Ethyl 4-(4-benzylpiperazin-1-yl)-7-chloro-8-methylquinoline-3-carboxylate (CAS 457937-15-4)
- 1-((5-Chlorothiophen-2-yl)sulfonyl)-4-((4-fluorophenyl)sulfonyl)piperidine (CAS 1448128-43-5)
- 5,6-Difluoro-4,7-diiodo-2,1,3-benzothiadiazole (CAS 1293389-29-3)
- tert-Butyl 5-(benzyloxy)-1-(chloromethyl)-1,2-dihydro-3H-benzo[e]indole-3-carboxylate (CAS 122745-40-8)
- Bis(2,2-dimethyl-6,6,7,7,8,8,8-heptafluoro-3,5-octanedionato)barium dihydrate (CAS 143457-82-3)
- (3-(trifluoromethyl)phenyl)(4-(trifluoromethyl)phenyl)methanone 21084-22-0 3,4'-Bis(trifluoromethyl)benzophenone (CAS 21084-22-0)
- 5-(1-Aminocyclohexyl)-1,3,4-thiadiazol-2-amine hydrochloride (CAS 1293924-34-1)
- Benzyl (2,5-dioxotetrahydrofuran-3-yl)carbamate (CAS 35739-00-5)
- 2-(4-Hydroxypiperidin-1-yl)-N-(5-methylisoxazol-3-yl)acetamide (CAS 1205604-18-7)
- 2-(Tert-butyl)-6-fluoro-5-nitro-1H-indole (CAS 952664-72-1)
- 3-(2,5-Dichlorophenyl)-1,1,1-trifluoropropan-2-ol (CAS 1487518-82-0)
- 4-(Azetidine-1-sulfonyl)-1h-pyrrole-2-carboxylic acid (CAS 1157026-93-1)
- 3,3,3-Trifluoropropanal diethylacetal (CAS 688-29-9)
- Antifreeze Polypeptide 6 (winter flounder) trifluoroacetate salt (CAS 122604-16-4)
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