4-Chlorothieno[2,3-b]pyridine-5-carboxylic acid CAS 700844-19-5
| CAS No. | 700844-19-5 |
| Molecular Formula | C8H4ClNO2S |
| Molecular Weight | 213.64 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
CATO manufactures 4-Chlorothieno[2,3-b]pyridine-5-carboxylic acid under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
4-Chlorothieno[2,3-b]pyridine-5-carboxylic acid (CAS 700844-19-5), molecular formula C8H4ClNO2S and molecular weight 213.64 g/mol, is a CATO reference standard with documented purity and traceability.
4-Chlorothieno[2,3-b]pyridine-5-carboxylic acid (C8H4ClNO2S) contains a nitrogen-containing heterocyclic scaffold, an amide group, a sulfone 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. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
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.
Physical & Chemical Properties
| Molecular Formula | C8H4ClNO2S |
| Molecular Weight | 213.64 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) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1985 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 1 |
Related Chlorothieno Standards
- 6-Chlorothieno[3,2-b]pyridine-3-carboxylic acid (CAS 1146081-35-7)
- 5-Chlorothieno[3,2-b]pyridine-6-carboxylic acid (CAS 117390-36-0)
- 5-Chlorothieno[3,2-b]pyridine-3-carboxylic acid (CAS 1356016-34-6)
- 7-chlorothieno[2,3-c]pyridine-2-carboxylic acid (CAS 1360902-95-9)
- 3-Chlorothieno[3,2-b]pyridine-2-carboxylic acid (CAS 1379299-75-8)
- 4-Chlorothieno[2,3-b]pyridine-2-carboxylic acid (CAS 1379335-94-0)
- 4-Chlorothieno[3,2-d]pyrimidine-6-carboxamide (CAS 1431411-18-5)
- 5-chlorothieno[3,2-b]pyridine-2-carboxylic acid (CAS 1896669-09-2)
Recommended Standards
- 4-Chlorobenzo[d]thiazole-2-carboxylic acid (CAS 3622-02-4)
- 4-Chlorothieno[2,3-c]pyridine-2-carboxylic acid (CAS 251996-86-8)
- 4-(3-Chloropropoxy)-2-fluorobenzonitrile (CAS 873547-02-5)
- 5-(3-chlorophenyl)-2H-1,3,4-oxathiazol-2-one (CAS 23589-73-3)
- Propionyl Bromide (CAS 598-22-1)
- N-(4-Chlorophenyl)-5-(4-nitrophenyl)-1,3,4-thiadiazol-2-amine (CAS 664973-39-1)
- N-Allyl-N-(3-methyl-1,2,4-thiadiazol-5-yl)acetamide (CAS 62347-32-4)
- (S)-(CF3)3-t-Bu-PHOX (CAS 944836-22-0)
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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 18665070610 / Nicole.chen@cato-chem.com