Description

3-Chlorothieno[2,3-B]Thiophene-2-Carboxylic Acid is a high-value heterocyclic building block and key synthetic intermediate. This compound is essential for advanced organic synthesis, particularly in the development of novel pharmaceuticals and functional materials. It is primarily sought by R&D chemists and process development scientists in the pharmaceutical, agrochemical, and material science industries for constructing complex molecular architectures.

Application

• Pharmaceutical Intermediate: A crucial precursor in the synthesis of active pharmaceutical ingredients (APIs), especially for drugs targeting central nervous system (CNS) disorders and other therapeutic areas.
• Agrochemical Research: Used in the development of new herbicides, fungicides, and insecticides, leveraging its unique fused thiophene-thiophene core.
• Material Science: Serves as a monomer or building block for creating conductive polymers, organic semiconductors, and non-linear optical (NLO) materials.
• Organic Synthesis: A versatile reagent for constructing complex heterocyclic systems, enabling novel ring formations and functional group transformations in medicinal chemistry.
• Dye & Pigment Industry: Acts as an intermediate for synthesizing specialized dyes and pigments with specific light-absorption properties.

Basic Information

Product Name	3-Chlorothieno[2,3-B]Thiophene-2-Carboxylic Acid
CAS No.	39244-08-1
Molecular Formula	C7H3ClO2S2
Molecular Weight	218.68 g/mol
Synonyms	3-Chlorothieno[2,3-b]thiophene-2-carboxylic acid; 2-Thiophenecarboxylic acid, 3-chlorothieno[2,3-b]thiophene-; 3-Chloro-thieno[2,3-b]thiophene-2-carboxylic acid; 3-Chloro-2-thieno[2,3-b]thiophenecarboxylic acid; 3-Chloro-2-thieno[2,3-b]thiophene carboxylic acid; 39244-08-1; Thieno[2,3-b]thiophene-2-carboxylic acid, 3-chloro-
EINECS	Contact for details

Quality Control

Our 3-Chlorothieno[2,3-B]Thiophene-2-Carboxylic Acid is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing, including HPLC, NMR, and mass spectrometry, to ensure high purity and batch-to-batch consistency. Certificates of Analysis (COA) detailing purity, identity, and impurity profiles are 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 area at room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed after opening to prevent degradation from atmospheric moisture.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Purity (HPLC)	≥ 98.0%
Melting Point	Contact for details
Loss on Drying	≤ 0.5%
Residue on Ignition	≤ 0.1%
Heavy Metals	≤ 20 ppm

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