Description

2,5-Diaminothiophene-3,4-Dicarboxylic Acid Diethyl Ester is a high-value heterocyclic building block and key synthetic intermediate. This compound matters for its role as a versatile precursor in the synthesis of complex organic molecules, particularly in advanced material science and pharmaceutical research. It is primarily needed by R&D chemists and process development scientists in the pharmaceutical, agrochemical, and organic electronics industries for constructing novel thiophene-based derivatives.

Application

• Pharmaceutical Intermediate: A critical precursor for the synthesis of novel drug candidates, particularly those targeting central nervous system (CNS) disorders and other therapeutic areas.
• Organic Semiconductor Synthesis: Serves as a key building block for creating π-conjugated systems used in organic field-effect transistors (OFETs) and organic photovoltaics (OPVs).
• Agrochemical Research: Used in the development of new active ingredients for crop protection products, leveraging its unique thiophene core.
• Dye and Pigment Manufacturing: Acts as a starting material for producing specialized dyes and functional pigments with specific light-absorption properties.
• Coordination Chemistry & Ligand Synthesis: Utilized to create novel chelating ligands for metal complexes in catalysis and material science.
• Polymer Chemistry: Incorporated as a monomer or functional modifier in the synthesis of specialty polymers with tailored electronic or optical characteristics.

Basic Information

Product Name	2,5-Diaminothiophene-3,4-Dicarboxylic Acid Diethyl Ester
CAS No.	80691-81-2
Molecular Formula	C10H14N2O4S
Molecular Weight	258.30 g/mol
Synonyms	Diethyl 2,5-diaminothiophene-3,4-dicarboxylate; 3,4-Thiophenedicarboxylic acid, 2,5-diamino-, diethyl ester; 2,5-Diamino-3,4-thiophenedicarboxylic acid diethyl ester; Ethyl 2,5-diamino-3,4-thiophenedicarboxylate; 80691-81-2; 2,5-Diaminothiophene-3,4-dicarboxylic acid ethyl ester; 3,4-Di(ethoxycarbonyl)-2,5-diaminothiophene
EINECS	Contact for details

Quality Control

Our 2,5-Diaminothiophene-3,4-Dicarboxylic Acid Diethyl Ester is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure it meets the high standards required for research and development applications. Certificates of Analysis (COA) documenting all critical quality attributes are available upon request to support your regulatory and quality assurance 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, the container must be kept tightly sealed after opening to prevent degradation from atmospheric moisture.

Specification

Item	Specification
Appearance	Yellow to brown crystalline powder
Identification (IR)	Conforms to structure
Purity (HPLC)	≥ 97.0%
Melting Point	Contact for details
Loss on Drying	≤ 1.0%
Residue on Ignition	≤ 0.5%

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