5-Chloro-3-ethoxythiophene-2-carboxylic acid CAS 1708401-61-9
| CAS No. | 1708401-61-9 |
| Molecular Formula | C7H7ClO3S |
| Molecular Weight | 206.65 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
5-Chloro-3-ethoxythiophene-2-carboxylic acid (C7H7ClO3S) contains a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution, an aromatic ring system. It is notably hygroscopic, 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).
5-Chloro-3-ethoxythiophene-2-carboxylic acid (CAS 1708401-61-9) is a high-purity analytical reference standard with the molecular formula C7H7ClO3S and a molecular weight of 206.65 g/mol.
This reference standard is suitable for quantitative analysis on major chromatographic platforms including HPLC, GC, LC-MS/MS, and GC-MS, serving as an external calibration standard or a system suitability test reference material.
CATO manufactures 5-Chloro-3-ethoxythiophene-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 | C7H7ClO3S |
| Molecular Weight | 206.65 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.) | 1994 |
| Halogen Content | Cl-containing |
| Sulfur Atoms | 1 |
Related Chloro Standards
- {[(4-chloro-1H-pyrazol-1-yl)methyl]thio}acetic acid (CAS 1004643-61-1)
- 2-chloro-7-fluoro-3,4-dihydroquinazolin-4-one (CAS 1107694-77-8)
- Methyl 4-chloro-3-hydroxy-5-methylthiophene-2-carboxylate (CAS 113589-29-0)
- 2-Chloro-6-methylpyridine-3-sulfonamide (CAS 1208081-21-3)
- 2-Chloro-5-methylpyridine-3-sulfonamide (CAS 1208081-46-2)
- 2-Chloro-4-methylpyridine-3-sulfonamide (CAS 1208081-58-6)
- 2-Chloro-N-methoxy-N-methylthiazole-5-carboxamide (CAS 1234014-27-7)
- 5-chloro-6-fluoro-1H-1,3-benzodiazole-2-carbaldehyde (CAS 1263378-80-8)
Recommended Standards
- Methyl 4-chloro-3-methoxythiophene-2-carboxylate (CAS 1707727-82-9)
- 3-chloro-5-methanesulfonylpyridin-2-amine (CAS 1803570-22-0)
- Methyl 5-chloro-4-methoxythiophene-2-carboxylate (CAS 1707581-69-8)
- Methyl 5-chloro-3-methoxythiophene-2-carboxylate (CAS 181063-65-0)
- N-(3-Methylisoxazol-5-yl)acrylamide (CAS 303129-82-0)
- 7-Hydroxyflumequine (CAS 61293-22-9)
- 2-(benZyloxy)-5-bromo-3-iodobenzaldehyde (CAS 832674-20-1)
- 2-Phenylthieno[3,2-c]pyridin-4(5H)-one (CAS 690636-03-4)
- N-((1H-Pyrrol-2-yl)methylene)cyclohexanamine (CAS 274687-34-2)
- 4-Chloro-2-fluoro-5-nitroaniline (CAS 86988-02-5)
- 7-oxabicyclo[2.2.1]heptane-1-carbaldehyde (CAS 1235980-06-9)
- 3-Methyl-5-nitrobenzonitrile (CAS 124289-22-1)
- 1-(6-Methoxypyridin-3-yl)piperazine (CAS 158399-76-9)
- Semaglutide impurity 76 (CAS CATO-C4X-222676)
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