3,5-Dichlorothiophene-2-sulfonyl chloride CAS 117500-73-9
| CAS No. | 117500-73-9 |
| Molecular Formula | C4HCl3O2S2 |
| Molecular Weight | 251.54 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
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.
3,5-Dichlorothiophene-2-sulfonyl chloride (CAS 117500-73-9), molecular formula C4HCl3O2S2 and molecular weight 251.54 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C4HCl3O2S2, 3,5-Dichlorothiophene-2-sulfonyl chloride contains a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 251.54 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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.
Physical & Chemical Properties
| Molecular Formula | C4HCl3O2S2 |
| Molecular Weight | 251.54 g/mol |
| Purity | 97%+ |
| Storage | Store at room temperature, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 3.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1990 |
| Halogen Content | Cl-containing |
| Sulfur Atoms | 2 |
Related Dichlorothiophene Standards
- 2,3-Dichlorothiophene-5-sulphonyl chloride (CAS 126714-85-0)
- 3,4-Dichlorothiophene-2-sulfonyl chloride (CAS 439898-68-7)
- 2,5-Dichlorothiophene-3-sulfonyl chloride (CAS 56946-83-9)
- 2,5-Dichlorothiophene-3,4-dicarboxylic acid (CAS 36217-24-0)
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