2,5-Dichloro-4-methoxybenzenesulfonyl chloride CAS 35509-62-7
| CAS No. | 35509-62-7 |
| Molecular Formula | C7H5Cl3O3S |
| Molecular Weight | 275.54 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 275.54 g/mol gives 2,5-Dichloro-4-methoxybenzenesulfonyl chloride distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
2,5-Dichloro-4-methoxybenzenesulfonyl chloride (CAS 35509-62-7) is a high-purity analytical reference standard with the molecular formula C7H5Cl3O3S and a molecular weight of 275.54 g/mol.
Structurally, 2,5-Dichloro-4-methoxybenzenesulfonyl chloride (C7H5Cl3O3S) 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 275.54 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.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
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 | C7H5Cl3O3S |
| Molecular Weight | 275.54 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, water |
| 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.) | 1967 |
| Halogen Content | Cl-containing |
| Sulfur Atoms | 1 |
Related Dichloro Standards
- 3,4-Dichloro-2-methoxybenzene-1-sulfonyl chloride (CAS 1246776-77-1)
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- 2,3-Dichloro-4-methoxybenzene-1-sulfonyl chloride (CAS 35509-60-5)
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