Description

4-Ethyl-5-Methylthiophene-3-Carboxylic Acid is a high-purity, functionalized thiophene derivative serving as a critical building block in advanced organic synthesis. This compound is valued for its unique heterocyclic structure, which is essential for modulating the electronic and physical properties of target molecules. It is primarily sought after by research institutions and industrial R&D departments in the pharmaceutical, agrochemical, and materials science sectors for developing novel active ingredients and functional materials.

Application

• Pharmaceutical Intermediate: A key synthon in the research and development of new drug candidates, particularly those targeting central nervous system (CNS) disorders, inflammation, and infectious diseases.
• Agrochemical Synthesis: Used in the creation of novel herbicides, fungicides, and insecticides, where the thiophene core contributes to biological activity and environmental stability.
• Organic Electronic Materials: Serves as a precursor for conjugated polymers and small molecules used in organic light-emitting diodes (OLEDs), organic photovoltaics (OPVs), and field-effect transistors (OFETs).
• Ligand and Catalyst Development: Employed in the synthesis of specialized ligands for catalysis and metal-organic frameworks (MOFs).
• Chemical Research & Development: A versatile reagent for academic and industrial research exploring new heterocyclic chemistry and structure-activity relationships (SAR).
• Dye and Pigment Intermediate: Used in the synthesis of specialized dyes and pigments where the thiophene ring enhances color fastness and spectral properties.

Basic Information

Item	Details
Product Name	4-Ethyl-5-Methylthiophene-3-Carboxylic Acid
CAS No.	884497-34-1
Molecular Formula	C8H10O2S
Molecular Weight	170.23 g/mol
Synonyms	3-Thiophenecarboxylic acid, 4-ethyl-5-methyl-; 4-Ethyl-5-methyl-3-thiophenecarboxylic acid; 4-Ethyl-5-methylthiophene-3-carboxylic acid; 5-Methyl-4-ethylthiophene-3-carboxylic acid; EMTA (abbreviation); 4-Ethyl-5-methyl-thiophene-3-carboxylic acid; 3-Carboxy-4-ethyl-5-methylthiophene
EINECS	Contact for details

Quality Control

Our 4-Ethyl-5-Methylthiophene-3-Carboxylic Acid is manufactured under strict quality management systems. Every batch undergoes comprehensive analytical testing, including HPLC, NMR, and GC-MS, to ensure identity, purity, and consistency. We provide a detailed Certificate of Analysis (COA) with each shipment, confirming compliance with agreed specifications. Our quality commitment supports applications requiring high-purity intermediates under cGMP and ISO 9001 guidelines.

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). Keep away from strong acids, bases, and oxidizing agents. The container must be kept tightly closed to prevent moisture absorption.

Specification

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