Description

2,3-Dihydrothieno[3,4-B][1,4]Dioxine-5-Carboxylic Acid is a high-value heterocyclic carboxylic acid derivative, serving as a critical building block in advanced organic synthesis. Its unique fused dioxine-thiophene structure makes it an essential precursor for the development of functional materials and active pharmaceutical ingredients (APIs). This compound is primarily sought after by research institutions and industrial manufacturers in the pharmaceutical, agrochemical, and specialty polymer sectors for creating novel compounds with tailored electronic and biological properties.

Application

• Pharmaceutical Intermediate: Key precursor in the synthesis of novel drug candidates, particularly for central nervous system (CNS) and cardiovascular therapies.
• Organic Electronic Materials: Building block for conjugated polymers and small molecules used in Organic Light-Emitting Diodes (OLEDs), Organic Photovoltaics (OPVs), and field-effect transistors (OFETs).
• Agrochemical Synthesis: Intermediate for developing new generation herbicides and fungicides with enhanced efficacy.
• Ligand and Catalyst Development: Used to create complex chelating ligands for catalysis and metal-organic frameworks (MOFs).
• Dye and Pigment Chemistry: Core structure for synthesizing specialized dyes and functional colorants.
• Academic and R&D: Fundamental research reagent for exploring new chemical reactions and material properties in heterocyclic chemistry.

Basic Information

Product Name	2,3-Dihydrothieno[3,4-B][1,4]Dioxine-5-Carboxylic Acid
CAS No.	260063-21-6
Molecular Formula	C7H6O4S
Molecular Weight	186.19 g/mol
Synonyms	2,3-Dihydrothieno[3,4-b][1,4]dioxine-5-carboxylic acid; Thieno[3,4-b][1,4]dioxine-5-carboxylic acid, 2,3-dihydro-; 5-Carboxy-2,3-dihydrothieno[3,4-b][1,4]dioxin; EDOT-acid; 3,4-Ethylenedioxythiophene-2-carboxylic acid; 2-Carboxy-3,4-ethylenedioxythiophene; 2,3-Dihydro-1,4-dioxino[2,3-c]thiophene-6-carboxylic acid
EINECS	Contact for details

Quality Control

Our 2,3-Dihydrothieno[3,4-B][1,4]Dioxine-5-Carboxylic Acid is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing, including HPLC, NMR, and FTIR, to ensure high purity and consistent chemical identity. Certificates of Analysis (COA) detailing purity, assay, and impurity profiles are provided with every shipment to support your quality assurance and regulatory compliance needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at a controlled room temperature (15-25°C). This compound is moisture-sensitive (hygroscopic); keep the container tightly sealed under an inert atmosphere (e.g., nitrogen or argon) for long-term storage to prevent degradation.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Purity (HPLC)	≥ 97.0%
Assay	≥ 98.0%
Loss on Drying	≤ 0.5%
Residue on Ignition	≤ 0.1%
Heavy Metals (as Pb)	≤ 10 ppm

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