Description

Thieno[2,3-B]Thiophene-2-Carboxylic Acid is a high-purity heterocyclic carboxylic acid building block essential for advanced organic synthesis. Its unique fused thiophene structure makes it a critical intermediate for developing novel materials and active pharmaceutical ingredients (APIs). This compound is primarily sought after by research chemists and process development scientists in the pharmaceutical, agrochemical, and organic electronics industries for constructing complex molecular architectures.

Application

• Pharmaceutical Intermediate: A key synthon for the synthesis of novel drug candidates, particularly in central nervous system (CNS) and anti-infective research.
• Agrochemical Synthesis: Used in the development of new generation herbicides and fungicides with unique modes of action.
• Organic Semiconductor Precursor: Serves as a building block for π-conjugated systems in organic field-effect transistors (OFETs) and organic photovoltaics (OPVs).
• Ligand and Catalyst Development: The carboxylic acid functionality allows for derivatization into chelating ligands for metal catalysis.
• Material Science Research: Employed in the creation of novel polymers and small molecules with tailored electronic and optical properties.
• Chemical Reference Standard: Used for analytical method development and quality control in laboratories requiring high-purity reference materials.

Basic Information

Product Name	Thieno[2,3-B]Thiophene-2-Carboxylic Acid
CAS No.	14756-75-3
Molecular Formula	C7H4O2S2
Molecular Weight	184.23 g/mol
Synonyms	2-Thieno[2,3-b]thiophenecarboxylic acid; Thieno[2,3-b]thiophene-2-carboxylic acid; 2-Carboxythieno[2,3-b]thiophene; TTC Acid; 2-Thienothiophene-2-carboxylic acid; 2,3-Thienothiophene-2-carboxylic acid; Benzo[b]thiophene-2-carboxylic acid, 4,5-thieno- (obsolete); Contact for additional synonyms.
EINECS	Contact for details

Quality Control

Our Thieno[2,3-B]Thiophene-2-Carboxylic Acid is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation by FT-IR and NMR spectroscopy, to ensure it meets the high standards required for research and development. A comprehensive Certificate of Analysis (COA) detailing all test results is provided with every shipment.

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 nature, the container must be kept tightly sealed after opening to prevent moisture absorption, which may affect stability and performance. Keep away from incompatible materials.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Purity (HPLC)	≥ 98.0%
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.