Description

3-Chlorothieno[2,3-B]Thiophene-2-Carbonyl Chloride is a high-purity, reactive organic intermediate of significant importance in advanced chemical synthesis. Its value lies in its role as a versatile building block for constructing complex heterocyclic systems, particularly in the development of novel active pharmaceutical ingredients (APIs) and functional materials. This compound is essential for R&D chemists and process development scientists in the pharmaceutical, agrochemical, and material science industries seeking to innovate with thiophene-based molecular architectures.

Application

• Pharmaceutical Intermediate: A key precursor in the synthesis of novel drug candidates, particularly those targeting central nervous system (CNS) disorders, anti-infectives, and other therapeutic areas.
• Agrochemical Synthesis: Used in the research and development of new-generation pesticides, herbicides, and fungicides that leverage the unique properties of the thienothiophene scaffold.
• Material Science Research: Serves as a building block for organic semiconductors, conductive polymers, and non-linear optical (NLO) materials due to its electron-rich fused ring system.
• Chemical Research & Development: Employed in academic and industrial labs for methodological studies in heterocyclic chemistry and the creation of novel chemical libraries for screening.
• Ligand and Catalyst Preparation: Useful for synthesizing specialized ligands for metal-organic frameworks (MOFs) or catalysts used in cross-coupling reactions.

Basic Information

Product Name	3-Chlorothieno[2,3-B]Thiophene-2-Carbonyl Chloride
CAS No.	39244-06-9
Molecular Formula	C7H2Cl2OS2
Molecular Weight	237.12 g/mol
Synonyms	3-Chlorothieno[2,3-b]thiophene-2-carbonyl chloride; 2,3-Dichlorocarbonylthieno[2,3-b]thiophene; Thieno[2,3-b]thiophene-2-carbonyl chloride, 3-chloro-; 3-Chloro-thieno[2,3-b]thiophene-2-carboxylic acid chloride; 3-Chlorothieno[2,3-b]thiophene-2-carboxylic acid chloride
EINECS	Contact for details

Quality Control

Our production of 3-Chlorothieno[2,3-B]Thiophene-2-Carbonyl Chloride adheres to stringent quality management protocols to ensure batch-to-batch consistency and high purity for sensitive synthetic applications. Each lot is characterized using advanced analytical techniques including HPLC, GC, NMR, and IR spectroscopy. A comprehensive Certificate of Analysis (COA) detailing purity, identity, and impurity profiles is provided with every shipment to support your quality assurance and regulatory needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at a controlled room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature and reactivity as an acid chloride, the container must be kept tightly sealed under an inert atmosphere (e.g., nitrogen or argon) after opening to prevent decomposition. Keep away from strong bases, oxidizers, and moisture.

Specification

Item	Specification
Appearance	White to off-white crystalline powder or solid
Identification (IR)	Conforms to structure
Purity (HPLC)	≥ 98.0%
Related Substances (HPLC)	Total impurities ≤ 2.0%
Water Content (KF)	≤ 0.5%
Residue on Ignition	≤ 0.1%

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.