4-Methylthiophene-2-sulfonyl chloride CAS 69815-97-0
| CAS No. | 69815-97-0 |
| Molecular Formula | C5H5ClO2S2 |
| Molecular Weight | 196.67 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-Methylthiophene-2-sulfonyl chloride (CAS 69815-97-0), a certified reference material (molecular formula C5H5ClO2S2, MW 196.67 g/mol) for analytical method development and quality control.
4-Methylthiophene-2-sulfonyl chloride (C5H5ClO2S2) contains a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution. 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. 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).
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 | C5H5ClO2S2 |
| Molecular Weight | 196.67 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, 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.) | 1976 |
| Halogen Content | Cl-containing |
| Sulfur Atoms | 2 |
Related Methylthiophene Standards
- 3-Methylthiophene-2-sulfonyl chloride (CAS 61714-76-9)
- 5-Methylthiophene-2-sulfonyl chloride (CAS 55854-45-0)
- 5-Methylthiophene-3-sulfonyl chloride (CAS 89379-25-9)
- Ethyl 5-methylthiophene-2-glyoxylate (CAS 50845-87-9)
- 4-Ethyl-5-methylthiophene-3-carbonyl chloride (CAS 1160248-82-7)
- 3-Methylthiophene-2,5-dicarboxylic acid (CAS 89677-40-7)
- 5-Methylthiophene-2,3-dicarboxylic Acid (CAS 46029-22-5)
- 4-Ethyl-5-methylthiophene-3-carbohydrazide (CAS 438225-41-3)
Recommended Standards
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- 2-(Hydroxymethyl)-3-iodo-5-methoxypyridin-4(1H)-one (CAS 1190198-17-4)
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- Semaglutide impurity 25 (CAS CATO-C4X-222625)
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