3-Chlorothieno[2,3-b]thiophene-2-carbonyl chloride CAS 39244-06-9
| CAS No. | 39244-06-9 |
| Molecular Formula | C7H2Cl2OS2 |
| Molecular Weight | 237.13 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.
3-Chlorothieno[2,3-b]thiophene-2-carbonyl chloride (CAS 39244-06-9), molecular formula C7H2Cl2OS2 and molecular weight 237.13 g/mol, is a CATO reference standard with documented purity and traceability.
3-Chlorothieno[2,3-b]thiophene-2-carbonyl chloride (C7H2Cl2OS2) contains sulfur-containing functionality, a hydroxyl group, an ether linkage, chlorine substitution, an aromatic ring system. Halogen substitution raises its density and boiling point; 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.
CATO manufactures 3-Chlorothieno[2,3-b]thiophene-2-carbonyl chloride 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.
Physical & Chemical Properties
| Molecular Formula | C7H2Cl2OS2 |
| Molecular Weight | 237.13 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 |
| Degree of Unsaturation (DBE) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1968 |
| Halogen Content | Cl-containing |
| Sulfur Atoms | 2 |
Related Chlorothieno Standards
- methyl 4-chlorothieno[3,2-d]pyrimidine-6-carboxylate (CAS 1363381-65-0)
- methyl 2-chlorothieno[2,3-d]pyrimidine-6-carboxylate (CAS 1896666-65-1)
- 1-{2-chlorothieno[3,2-d]pyrimidin-4-yl}-1H-1,2,4-triazole (CAS 1591748-64-9)
- methyl 7-chlorothieno[3,2-b]pyridine-2-carboxylate (CAS 875339-21-2)
- methyl 7-chlorothieno[3,2-b]pyridine-6-carboxylate (CAS 96516-52-8)
- Methyl 6-chlorothieno[3,2-b]thiophene-2-carboxylate (CAS 70060-23-0)
- Ethyl 3-chlorothieno[2,3-c]pyridine-2-carboxylate (CAS 1603136-56-6)
- Ethyl 3-chlorothieno[2,3-b]pyridine-2-carboxylate (CAS 66869-77-0)
Recommended Standards
- 3-(Difluoromethyl)-8-(trifluoromethyl)-[1,2,4]triazolo[4,3-a]pyridine (CAS 477871-44-6)
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- 2-Nitro-4-(trifluoromethoxy)anisole (CAS 660848-54-4)
- 4-(4-Bromobutoxy)tetrahydro-2h-pyran (CAS 476423-97-9)
- 4-Chloro-6-phenyl-1H-pyrazolo[3,4-d]pyrimidine (CAS 30129-52-3)
- 2-((Butyl(methyl)amino)methyl)benzaldehyde (CAS 1443310-53-9)
- 1-(6-Methyl-[1,2,3]triazolo[1,5-a]pyrazin-4-yl)piperidine-4-carboxylic acid (CAS 1713462-85-1)
- 4-{[2-(piperidin-1-yl)-1,3-thiazol-5-yl]methyl}morpholine (CAS 478260-14-9)
- 2-(Piperazin-1-ylsulfonyl)benzoic acid (CAS 1215613-85-6)
- (R)-3-amino-2,3-dihydrobenzo[b][1,4]oxazepin-4(5H)-one (CAS 158892-18-3)
- 2,4,6-Trichloro-5-(trifluoromethyl)pyrimidine (CAS 1658428-08-0)
- 2-Chloro-4-(2-nitrovinyl)phenol (CAS 61131-66-6)
- 2-fluoro-5-{5H,6H,7H,8H,9H-[1,2,4]triazolo[4,3-a]azepin-3-yl}aniline (CAS 930396-05-7)
- D-Ile27-Tirzepatide (CAS CATO-CPTD788907)
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