Description

Thieno[2,3-B]Thiophene-2,5-Dicarboxylic Acid, 3,4-Diamino- CAS NO 345910-71-6 is a high-purity, multi-functional heterocyclic organic compound featuring both carboxylic acid and diamine functional groups on a fused thienothiophene core. This unique structure makes it a critical building block (synthon) for advanced material synthesis, particularly in the development of novel polymers and dyes. It is primarily sought after by research institutions, pharmaceutical intermediates manufacturers, and specialty chemical producers working on cutting-edge applications.

Application

• Pharmaceutical Intermediate: Serves as a key precursor in the synthesis of novel active pharmaceutical ingredients (APIs), especially for compounds targeting specific biological pathways.
• Organic Semiconductor Material: Used in the research and development of organic field-effect transistors (OFETs), organic photovoltaics (OPVs), and other electronic components due to its conjugated system.
• Dye and Pigment Synthesis: Acts as a core structure for creating high-performance, color-fast dyes and pigments for technical textiles and advanced coatings.
• Ligand for Catalysis: Utilized in the preparation of complex ligands for metal-organic frameworks (MOFs) and homogeneous catalysis applications.
• Polymer Chemistry: Functions as a monomer or cross-linking agent for synthesizing specialty polymers with tailored thermal and mechanical properties.
• Academic & Industrial Research: A valuable compound for fundamental research in organic chemistry and materials science.

Basic Information

Product Name	Thieno[2,3-B]Thiophene-2,5-Dicarboxylic Acid, 3,4-Diamino-
CAS No.	345910-71-6
Molecular Formula	C8H6N2O4S2
Molecular Weight	258.28 g/mol
Synonyms	3,4-Diaminothieno[2,3-b]thiophene-2,5-dicarboxylic acid; 2,5-Thieno[2,3-b]thiophenedicarboxylic acid, 3,4-diamino-; 3,4-Diaminothieno[2,3-b]thiophene-2,5-dicarboxylate; Thieno[2,3-b]thiophene-2,5-dicarboxylic acid, 3,4-diamino-; 345910-71-6; 3,4-Diamino-thieno[2,3-b]thiophene-2,5-dicarboxylic acid; DTXSID70733492
EINECS	Contact for details

Quality Control

Our Thieno[2,3-B]Thiophene-2,5-Dicarboxylic Acid, 3,4-Diamino- is manufactured under strict quality management protocols. Each batch undergoes rigorous analytical testing including HPLC, NMR, and elemental analysis to ensure identity, purity, and consistency. A comprehensive Certificate of Analysis (COA) detailing all specifications is provided with every shipment. We support cGMP and ISO 9001 compliant production for research and commercial scale requirements.

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). This compound is hygroscopic (moisture-sensitive); keep the container tightly sealed to minimize exposure to atmospheric humidity. Keep away from incompatible materials.

Specification

Item	Specification
Appearance	Yellow to brown powder or crystals
Identification (IR)	Conforms to structure
Purity (HPLC)	≥ 97.0% (Area %)
Water Content (KF)	≤ 2.0%
Residue on Ignition	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm

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