Description

5-Methylthiophene-2,3-Dicarboxylic Acid is a high-purity organic building block featuring a thiophene core with methyl and dicarboxylic acid functional groups. This compound is valued for its role as a versatile intermediate in the synthesis of complex molecules, particularly in pharmaceutical and advanced material research. It is primarily sought by R&D chemists and process development scientists in the pharmaceutical, agrochemical, and specialty chemical industries for constructing novel heterocyclic compounds and functional materials.

Application

• Pharmaceutical Intermediate: Key building block for the synthesis of novel active pharmaceutical ingredients (APIs), especially those containing functionalized thiophene scaffolds.
• Agrochemical Synthesis: Used in the research and development of new herbicides, fungicides, and insecticides that leverage the thiophene moiety for bioactivity.
• Material Science Research: Serves as a precursor for organic semiconductors, conductive polymers, and metal-organic frameworks (MOFs) due to its conjugated system and carboxylic acid handles.
• Ligand and Catalyst Development: The dicarboxylic acid groups make it a useful starting material for creating chelating ligands in coordination chemistry and catalysis.
• Fine Chemical Production: Employed in the custom synthesis of specialty chemicals for electronics, dyes, and sensors.

Basic Information

Product Name	5-Methylthiophene-2,3-Dicarboxylic Acid
CAS No.	46029-22-5
Molecular Formula	C8H8O4S
Molecular Weight	200.21 g/mol
Synonyms	2,3-Thiophenedicarboxylic acid, 5-methyl-; 5-Methyl-2,3-thiophenedicarboxylic Acid; 5-Methylthiophene-2,3-dicarboxylate; 5-Methyl-2,3-dicarboxythiophene; 3-Methylthiophene-4,5-dicarboxylic Acid (alternative numbering); 46029-22-5; 5-Methylthiophene-2,3-dicarboxylic acid
EINECS	Contact for details

Quality Control

Our 5-Methylthiophene-2,3-Dicarboxylic Acid is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation via IR and NMR spectroscopy, to ensure it meets the high standards required for research and industrial synthesis. A comprehensive Certificate of Analysis (COA) detailing all specifications is provided with every shipment and is available upon request.

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 to prevent degradation from atmospheric moisture.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Purity (HPLC)	≥ 97.0%
Melting Point	Contact for details
Loss on Drying	≤ 1.0%
Residue on Ignition	≤ 0.1%

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