Description

4-Ethyl-5-Methylthiophene-2-Carboxylic Acid is a high-purity, functionalized thiophene derivative serving as a critical building block in advanced organic synthesis. Its value lies in its unique heterocyclic structure, which is essential for constructing complex molecules with tailored electronic and biological properties. This compound is primarily needed by research institutions and manufacturers in the pharmaceutical, agrochemical, and material science industries for developing novel active ingredients and functional materials.

Application

• Pharmaceutical Intermediate: A key synthon for the development of novel drug candidates, particularly in therapeutic areas requiring complex heterocyclic scaffolds.
• Agrochemical Synthesis: Used in the research and production of advanced pesticides and herbicides, where the thiophene moiety can enhance biological activity.
• Organic Electronic Materials: Serves as a precursor for conjugated polymers and small molecules used in organic light-emitting diodes (OLEDs), field-effect transistors (OFETs), and solar cells.
• Ligand and Catalyst Development: Employed in the synthesis of specialized ligands for catalysis and metal-organic frameworks (MOFs).
• Chemical Research & Development: A versatile building block for academic and industrial R&D exploring new chemical entities and reaction pathways.
• Fine Chemical Production: Integral to the multi-step synthesis of complex fine chemicals and specialty additives.

Basic Information

Product Name	4-Ethyl-5-Methylthiophene-2-Carboxylic Acid
CAS No.	154828-65-6
Molecular Formula	C8H10O2S
Molecular Weight	170.23 g/mol
Synonyms	2-Thiophenecarboxylic acid, 4-ethyl-5-methyl-; 4-Ethyl-5-methyl-2-thiophenecarboxylic acid; 4-Ethyl-5-methylthiophene-2-carboxylic acid; 5-Methyl-4-ethylthiophene-2-carboxylic acid; 154828-65-6; 4-Ethyl-5-methylthiophene-2-carboxylate; 4-Ethyl-5-methyl-2-thiophenecarboxylate
EINECS	Contact for details

Quality Control

Our 4-Ethyl-5-Methylthiophene-2-Carboxylic Acid is manufactured under strict quality management protocols. Every batch undergoes rigorous analytical testing, including HPLC, NMR, and FTIR, to ensure identity, purity, and consistency. We provide comprehensive Certificates of Analysis (COA) with each shipment, detailing all critical specifications. Our quality systems are designed to support cGMP and ISO standards for reliable supply to regulated industries.

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 product is hygroscopic (moisture-sensitive) and must be kept under dry, inert conditions to prevent degradation. Keep away from heat, sparks, and open flame.

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.