2-chloro-5-phenylthiophene-3-carboxylic acid CAS 1186049-66-0
| CAS No. | 1186049-66-0 |
| Molecular Formula | C11H7ClO2S |
| Molecular Weight | 238.69 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of 2-chloro-5-phenylthiophene-3-carboxylic acid is closely related to a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution, an aromatic ring system in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
2-chloro-5-phenylthiophene-3-carboxylic acid (CAS 1186049-66-0), molecular formula C11H7ClO2S and molecular weight 238.69 g/mol, is a CATO reference standard with documented purity and traceability.
2-chloro-5-phenylthiophene-3-carboxylic acid (C11H7ClO2S) contains a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution, an aromatic ring system. Halogen substitution raises its density and boiling point, its high carbon-to-hydrogen ratio confers good lipid solubility, 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).
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.
As a certified reference material (CRM), 2-chloro-5-phenylthiophene-3-carboxylic acid 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.
Physical & Chemical Properties
| Molecular Formula | C11H7ClO2S |
| Molecular Weight | 238.69 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1989 |
| Halogen Content | Cl-containing |
| Sulfur Atoms | 1 |
Related chloro Standards
- 5-Chloro-3-(thiophen-3-yl)benzoic acid (CAS 1261926-16-2)
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- 4-Chloro-2-phenylamino-thiazole-5-carbaldehyde (CAS 126193-27-9)
- 4-Chloro-2-(thiophen-3-yl)benzoic acid (CAS 1261969-28-1)
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