5-Chloro-4-methoxythiophene-3-carboxylic acid CAS 133659-14-0
Purity 97%+In StockPharmaceutical Standards
| CAS No. | 133659-14-0 |
| Molecular Formula | C6H5ClO3S |
| Molecular Weight | 192.62 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
5-Chloro-4-methoxythiophene-3-carboxylic acid (CAS 133659-14-0) is a high-purity pharmaceutical standards reference standard from CATO, an ISO 17034 accredited reference material producer. Molecular formula: C6H5ClO3S. Molecular weight: 192.62 g/mol. Each batch is supplied with a Certificate of Analysis (COA).
Physical & Chemical Properties
| Molecular Formula | C6H5ClO3S |
| Molecular Weight | 192.62 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°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.) | 1995 |
| Halogen Content | Cl-containing |
| Sulfur Atoms | 1 |
Related Chloro Standards
- ethyl 4-chloro-1,2,5-thiadiazole-3-carboxylate (CAS 1048982-04-2)
- 4-chloro-5-fluoro-1H,2H,3H-pyrrolo[2,3-b]pyridin-2-one (CAS 1190315-74-2)
- 2-Chloro-3-(methylsulfonyl)pyrazine (CAS 1209459-15-3)
- 2-Chloro-4-(methylsulfonyl)pyrimidine (CAS 1233026-31-7)
- Ethyl 5-chloro-1,2,4-thiadiazole-3-carboxylate (CAS 1346147-95-2)
- 4-Chloro-3-methoxythiophene-2-carboxylic acid (CAS 1508708-17-5)
- 2-chloro-1-[1-(fluoromethyl)-2-oxabicyclo[2.1.1]hexan-4-yl]ethanone (CAS 2573212-76-5)
- 2-Chloro-5-(methylsulfonyl)pyrimidine (CAS 321565-33-7)
Recommended Standards
- 5-Chloropyridine-3-sulfonamide (CAS 1334148-60-5)
- 6-Methylpyridazine-3-sulfonyl chloride (CAS 1250556-77-4)
- Methyl 5-amino-2-chlorothiazole-4-carboxylate (CAS 136538-94-8)
- 4-Fluorophenethyl Isocyanate (CAS 65535-53-7)
- (S)-3,3,3-Trifluoro-1-phenyl-2-propylamine hydrochloride (CAS 1389320-25-5)
- 4-(2-Aminoethyl)-3-(4-fluorophenyl)-1H-pyrazol-5-ol (CAS 878208-78-7)
- (1-(6-Methylpyridin-2-yl)-1H-imidazol-4-yl)(4-(3-(trifluoromethyl)phenyl)piperazin-1-yl)methanone (CAS 477890-33-8)
- 7-methoxy-2-azaspiro[3.5]nonane (CAS 2168506-38-3)
- 1-(5-allyloxy-2-methyl-phenyl)hexahydropyrimidine-2,4-dione (CAS 2633635-26-2)
- Semaglutide impurity 86 (CAS CATO-C4X-222686)
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 13829788188 / jacky.chen@cato-chem.com