4,5-Dichloro-3-methoxythiophene-2-carboxylic acid CAS 120715-49-3
| CAS No. | 120715-49-3 |
| Molecular Formula | C6H4Cl2O3S |
| Molecular Weight | 227.07 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.
4,5-Dichloro-3-methoxythiophene-2-carboxylic acid (CAS 120715-49-3) is a high-purity analytical reference standard with the molecular formula C6H4Cl2O3S and a molecular weight of 227.07 g/mol.
Owing to a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution, an aromatic ring system, 4,5-Dichloro-3-methoxythiophene-2-carboxylic acid is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 227.07 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).
CATO manufactures 4,5-Dichloro-3-methoxythiophene-2-carboxylic acid 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.
Physical & Chemical Properties
| Molecular Formula | C6H4Cl2O3S |
| Molecular Weight | 227.07 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.) | 1991 |
| Halogen Content | Cl-containing |
| Sulfur Atoms | 1 |
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Recommended Standards
- (5-Chloropyrazin-2-yl)methanesulfonyl chloride (CAS 1196145-84-2)
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- 3,5-Dichloropyridine-2-sulfonamide (CAS 1247346-43-5)
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