4-Ethoxy-3-methylbenzenesulfonyl chloride CAS 69129-64-2
| CAS No. | 69129-64-2 |
| Molecular Formula | C9H11ClO3S |
| Molecular Weight | 234.70 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
CATO supplies 4-Ethoxy-3-methylbenzenesulfonyl chloride (CAS 69129-64-2), a certified reference material (molecular formula C9H11ClO3S, MW 234.70 g/mol) for analytical method development and quality control.
Structurally, 4-Ethoxy-3-methylbenzenesulfonyl chloride (C9H11ClO3S) contains a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution, an aromatic ring system. The molecule exhibits a degree of unsaturation (DBE) of 4.0, corresponding to approximately 4 ring(s) or double-bond equivalent(s). With a molecular weight of 234.70 g/mol, it falls into the medium-molecular-weight range. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
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 | C9H11ClO3S |
| Molecular Weight | 234.70 g/mol |
| Purity | 97%+ |
| Storage | Store in a cool place (≤25°C), keep sealed and dry, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Hygroscopic; reseal immediately after opening; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 4.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1976 |
| Halogen Content | Cl-containing |
| Sulfur Atoms | 1 |
Related Ethoxy Standards
- 5-Ethoxy-2-methyl-benzenesulfonyl chloride (CAS 1263210-67-8)
- 2-Ethoxy-5-methylbenzene-1-sulfonyl chloride (CAS 187471-28-9)
- 2-Ethoxy-4-methylbenzene-1-sulfonyl chloride (CAS 956722-60-4)
- 4-Ethoxy-2-methylbenzene-1-sulfonyl chloride (CAS 68978-28-9)
- 2-Ethoxy-1-naphthoyl chloride (CAS 55150-29-3)
- (2-Ethoxy-5-(trifluoromethyl)pyridin-3-yl)boronic acid (CAS 1218790-66-9)
- (6-Ethoxy-5-(trifluoromethyl)pyridin-3-yl)boronic acid (CAS 849934-85-6)
- 2-Ethoxy-5-(1-isopropylpyrrolidin-2-yl)pyridine (CAS 1352486-62-4)
Recommended Standards
- 4-Isopropoxybenzene-1-sulfonyl chloride (CAS 98995-40-5)
- 4-Chloro-n-propylpyridine-3-sulfonamide (CAS 76835-21-7)
- 4-Methoxy-2,5-dimethylbenzenesulfonyl chloride (CAS 91179-12-3)
- 4-Chloro-n-isopropylpyridine-3-sulfonamide (CAS 59582-92-2)
- 2-Amino-3-Methyl-9H-Pyrido[2,3-b]indole (CAS 68006-83-7)
- 7-Bromo-3-(chloromethyl)-2(1H)-quinolinone (CAS 1017347-03-3)
- 2-Amino-5,5-dimethylhexanoic acid (CAS 142886-10-0)
- Isopropyl 4-oxo-4H-pyran-2-carboxylate (CAS 120958-45-4)
- N-(piperidin-4-yl)-1H-pyrrole-2-carboxamide (CAS 1094766-82-1)
- (S)-2-Amino-N-ethyl-N-(4-fluoro-benzyl)-propionamide (CAS 1354000-26-2)
- (2E)-3-[5-(methoxycarbonyl)furan-2-yl]prop-2-enoic acid (CAS 111252-37-0)
- Bixafen (CAS 581809-46-3)
- 2-(Difluoromethyl)-6-iodo-3-methylpyridine-4-sulfonamide (CAS 1806950-23-1)
- Semaglutide impurity 267 (CAS CATO-C4X-2226267)
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