Methyl 5-(chlorosulfonyl)-4-methoxythiophene-3-carboxylate CAS 175203-45-9
| CAS No. | 175203-45-9 |
| Molecular Formula | C7H7ClO5S2 |
| Molecular Weight | 270.71 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
CATO manufactures Methyl 5-(chlorosulfonyl)-4-methoxythiophene-3-carboxylate 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.
Methyl 5-(chlorosulfonyl)-4-methoxythiophene-3-carboxylate (CAS 175203-45-9), molecular formula C7H7ClO5S2 and molecular weight 270.71 g/mol, is a CATO reference standard with documented purity and traceability.
Owing to a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution, an aromatic ring system, Methyl 5-(chlorosulfonyl)-4-methoxythiophene-3-carboxylate is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 270.71 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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 | C7H7ClO5S2 |
| Molecular Weight | 270.71 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.) | 2007 |
| Halogen Content | Cl-containing |
| Sulfur Atoms | 2 |
Related Methyl Standards
- Methyl 5-(chlorosulfonyl)-4-methoxythiophene-2-carboxylate (CAS 1384429-11-1)
- 3-(Chlorosulfonyl)naphthalene-1-carboxylic acid (CAS 1258652-21-9)
- 5-(Chlorosulfonyl)-1-naphthoic acid (CAS 294840-12-3)
- Methyl 5-(chlorosulfonyl)-2,4-difluorobenzoate (CAS 1099632-51-5)
- Methyl 3-(chlorosulfonyl)-2,5-difluorobenzoate (CAS 1154149-20-8)
- Methyl 3-(chlorosulfonyl)-2,6-difluorobenzoate (CAS 1154155-42-6)
- methyl 5-(chlorosulfonyl)-2,3-difluorobenzoate (CAS 1247485-41-1)
- 5-(Chlorosulfonyl)isoquinoline-1-carboxylic acid (CAS 1258640-93-5)
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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