4-((4-Chlorobenzyl)thio)-5-ethoxy-2-phenylpyridazin-3(2H)-one CAS 5509-74-0
| CAS No. | 5509-74-0 |
| Molecular Formula | C19H17ClN2O2S |
| Molecular Weight | 372.87 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
CATO manufactures 4-((4-Chlorobenzyl)thio)-5-ethoxy-2-phenylpyridazin-3(2H)-one 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.
4-((4-Chlorobenzyl)thio)-5-ethoxy-2-phenylpyridazin-3(2H)-one (CAS 5509-74-0) is a high-purity analytical reference standard with the molecular formula C19H17ClN2O2S and a molecular weight of 372.87 g/mol.
Owing to a steroid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage, chlorine substitution, 4-((4-Chlorobenzyl)thio)-5-ethoxy-2-phenylpyridazin-3(2H)-one is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 372.87 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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.
Physical & Chemical Properties
| Molecular Formula | C19H17ClN2O2S |
| Molecular Weight | 372.87 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°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) | 12.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1958 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 1 |
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Recommended Standards
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- (5-Chloro-2-hydroxyphenyl)(piperazin-1-yl)methanone (CAS 1016773-94-6)
- rac-(2R,3R)-2-(4-chlorophenyl)oxolane-3-carboxylic acid (CAS 1820580-87-7)
- 1-(Allyloxy)-3-bromobenzene (CAS 41388-50-5)
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- 4-((6,7-Dimethoxyquinolin-4-yl)oxy)aniline dihydrochloride (CAS 35654-47-8)
- Allo-D-Ile12-Tirzepatide (CAS CATO-CPTD788963)
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