4-chlorothieno[3,2-c]pyridine-7-carboxylic acid CAS 55040-48-7
| CAS No. | 55040-48-7 |
| Molecular Formula | C8H12ClNO2S |
| Molecular Weight | 221.70 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
4-chlorothieno[3,2-c]pyridine-7-carboxylic acid (CAS 55040-48-7), molecular formula C8H12ClNO2S and molecular weight 221.70 g/mol, is a CATO reference standard with documented purity and traceability.
Owing to an amide group, a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution, 4-chlorothieno[3,2-c]pyridine-7-carboxylic acid is typically white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 221.70 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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).
As a certified reference material (CRM), 4-chlorothieno[3,2-c]pyridine-7-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 | C8H12ClNO2S |
| Molecular Weight | 221.70 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| 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) | 3.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1972 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 1 |
Related chlorothieno Standards
- 4-chlorothieno[3,2-c]pyridine-2-carboxylic acid (CAS 1360891-68-4)
- 7-chlorothieno[2,3-c]pyridine-4-carboxylic acid (CAS 1360959-24-5)
- 6-chlorothieno[2,3-b]pyridine-2-carboxylic acid (CAS 1536794-94-1)
- 7-chlorothieno[3,2-b]pyridine-2-carboxylic acid (CAS 596793-57-6)
- 7-chlorothieno[3,2-b]pyridine-6-carboxylic acid (CAS 90690-94-1)
- 4-chlorothieno[3,2-c]pyridine-7-carboxamide (CAS 55040-49-8)
- 4-chlorothieno[3,2-d]pyrimidine-7-carboxylic acid (CAS 1269667-57-3)
- 2-chlorothieno[2,3-d]pyrimidine-6-carboxylic acid (CAS 1504800-73-0)
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