3-Ethoxythiophene-2-carbonyl chloride CAS 139926-24-2
| CAS No. | 139926-24-2 |
| Molecular Formula | C7H7ClO2S |
| Molecular Weight | 190.65 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), 3-Ethoxythiophene-2-carbonyl chloride meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
3-Ethoxythiophene-2-carbonyl chloride (CAS 139926-24-2), molecular formula C7H7ClO2S and molecular weight 190.65 g/mol, is a CATO reference standard with documented purity and traceability.
The molecular framework of 3-Ethoxythiophene-2-carbonyl chloride (C7H7ClO2S) is characterized by a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution, an aromatic ring system. In reversed-phase chromatography, its retention is governed primarily by the polarity and ionization state of its functional groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. 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).
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C7H7ClO2S |
| Molecular Weight | 190.65 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 | May oxidize slowly on prolonged air exposure; 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.) | 1996 |
| Halogen Content | Cl-containing |
| Sulfur Atoms | 1 |
Related Ethoxythiophene Standards
- 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)
- Ethyl 4-ethoxythiophene-3-carboxylate (CAS 70437-99-9)
- 4-ethoxythiophene-3-carboxylic acid (CAS 70438-00-5)
- 3-Ethoxythiophene-2-carboxylic acid (CAS 139926-23-1)
- 4-Ethoxythiophene-2-carboxylic acid (CAS 917980-53-1)
Recommended Standards
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- N-methyl-n-(2-thiazolylmethyl)carbamic chloride (CAS 1391921-19-9)
- Methyl 4-chloro-5-methylthiophene-2-carboxylate (CAS 1399660-78-6)
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