4-ethoxythiophene-3-carboxylic acid CAS 70438-00-5
| CAS No. | 70438-00-5 |
| Molecular Formula | C7H12O3S |
| Molecular Weight | 176.23 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
CATO supplies 4-ethoxythiophene-3-carboxylic acid (CAS 70438-00-5), a certified reference material (molecular formula C7H12O3S, MW 176.23 g/mol) for analytical method development and quality control.
4-ethoxythiophene-3-carboxylic acid (C7H12O3S) contains a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage. It is notably hygroscopic, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
CATO manufactures 4-ethoxythiophene-3-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 | C7H12O3S |
| Molecular Weight | 176.23 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO, water |
| Stability | Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 2.0 |
| CAS Registry Year (est.) | 1977 |
| Sulfur Atoms | 1 |
Related ethoxythiophene Standards
- 3-Ethoxythiophene-2-carboxylic acid (CAS 139926-23-1)
- 4-Ethoxythiophene-2-carboxylic acid (CAS 917980-53-1)
- 4-Ethoxythiophene-3-carboxamide (CAS 71050-41-4)
- Methyl 3-Ethoxythiophene-2-carboxylate (CAS 139926-22-0)
- Methyl 4-ethoxythiophene-2-carboxylate (CAS 1707391-85-2)
- 3-Ethoxythiophene-2-carbohydrazide (CAS 175137-40-3)
- Methyl 4-ethoxythiophene-3-carboxylate (CAS 1823338-68-6)
- 3-Ethoxythiophene-2-carbonyl chloride (CAS 139926-24-2)
Recommended Standards
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- 4-Methyl-2H-chromene-2-thione (CAS 25624-32-2)
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- 4-Methylsulfonylcyclohexanone (CAS 862129-72-4)
- 1-benzyl-1,9-diazaspiro[5.5]undecane (CAS 1100748-68-2)
- 4-Chlorophenol-d4 (CAS 344298-84-6)
- 2-Propenoic acid, 2-methyl-, 2-hydroxyethyl ester, polymer with octadecyl 2-methyl-2-propenoate (CAS 60542-45-2)
- 28788-62-7 Benzoyl chloride, 4-butyl- 4-Butylbenzoyl chloride EINECS 249-224-2 (CAS 28788-62-7)
- 4-Amino-5-iodo-2-(trifluoromethyl)benzonitrile (CAS 852569-35-8)
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- Rocuronium Impurity 32 (CAS CATO-C4X-124232)
- 4-fluoro-1H-indazole-3-carboxylic acid (CAS 885521-64-2)
- Ethyl 3-carboethoxybenzoylformate (CAS 732249-84-2)
- (9-D-Asp) Semaglutide X Sodium salt (CAS CATO-CPTD788617)
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