ethyl 5-chlorothiophene-3-carboxylate CAS 189331-32-6
| CAS No. | 189331-32-6 |
| Molecular Formula | C7H11ClO2S |
| Molecular Weight | 194.68 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including ethyl 5-chlorothiophene-3-carboxylate.
ethyl 5-chlorothiophene-3-carboxylate (CAS 189331-32-6), molecular formula C7H11ClO2S and molecular weight 194.68 g/mol, is a CATO reference standard with documented purity and traceability.
ethyl 5-chlorothiophene-3-carboxylate (C7H11ClO2S) contains a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution. 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. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
The assigned purity is verified by mass-balance and quantitative NMR (qNMR) approaches, with the expanded uncertainty reported at a 95% confidence level (k=2). Batch homogeneity and stability are independently assessed for every lot.
Physical & Chemical Properties
| Molecular Formula | C7H11ClO2S |
| Molecular Weight | 194.68 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 2.0 |
| CAS Registry Year (est.) | 2011 |
| Halogen Content | Cl-containing |
| Sulfur Atoms | 1 |
Related ethyl Standards
- 2-Chlorothiophene-3-sulfonamide (CAS 1773488-28-0)
- 3-chlorothiophene-2-sulfonamide (CAS 850340-85-1)
- 4-Chlorothiophene-2-sulfonamide (CAS 519055-68-6)
- 5-Chlorothiophene-2-sulfonamide (CAS 53595-66-7)
- 5-Chlorothiophene-3-sulfonamide (CAS 887571-42-8)
- Ethyl 2-chlorothiophene-3-carboxylate (CAS 1214379-28-8)
- Ethyl 3-chlorothiophene-2-carboxylate (CAS 153562-66-4)
- Ethyl 4-chlorothiophene-2-carboxylate (CAS 59614-94-7)
Recommended Standards
- Desethylatrazine-d7 (iso-propyl-d7) (CAS 1216649-31-8)
- 2-(2-Chlorophenyl)thiophene (CAS 893736-04-4)
- Thioctic acid Impurity 42 (CAS 90435-60-2)
- 2-(3-Chloro-phenyl)-thiophene (CAS 59156-10-4)
- 5-Amino-2-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)isonicotinaldehyde (CAS 1351279-71-4)
- 1-(4-Nitrophenyl)-2-(pyrrolidin-1-ylimino)ethanone (CAS 25555-23-1)
- Cobalt cyclohexylbutyrate (CAS 38582-17-1)
- Methyl 2-((3-chloro-5-(trifluoromethyl)pyridin-2-yl)amino)-2-methylpropanoate (CAS 1354448-69-3)
- 3-Amino-6-fluoropicolinic acid (CAS 1806510-92-8)
- 4-Bromo-2-{[(4-fluoro-3-nitrophenyl)amino]methyl}-6-methoxyphenol (CAS 329059-05-4)
- Linezolid impurity 105 (CAS 556801-12-8)
- Tert-butyl 4-((S)-1-amino-2-methoxy-2-oxoethyl)-2-methylpiperidine-1-carboxylate (CAS 2387585-39-7)
- 6-Amino-5-(2,2-diethoxyethyl)-2-((4-(4-methylpiperazin-1-yl)phenyl)amino)pyrimidin-4(3H)-one (CAS 1245649-22-2)
- [Glu]17-Liraglutide (CAS CATO-C4X-199236)
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