Description

5-Methylbenzo[B]Thiophene-3-Carboxylic Acid is a high-purity organic building block and key synthetic intermediate of significant commercial and research interest. Its value lies in its functionalized benzothiophene core, which serves as a versatile scaffold for constructing more complex molecules in advanced chemical synthesis. This compound is primarily needed by pharmaceutical R&D teams, agrochemical manufacturers, and specialty chemical producers for applications in drug discovery, material science, and the development of functional organic compounds.

Application

• Pharmaceutical Intermediate: A critical precursor in the synthesis of novel active pharmaceutical ingredients (APIs), particularly those targeting central nervous system (CNS) disorders and other therapeutic areas.
• Agrochemical Synthesis: Used in the research and development of new-generation herbicides, fungicides, and plant growth regulators, leveraging its heterocyclic structure.
• Material Science Research: Serves as a building block for organic semiconductors, liquid crystals, and advanced polymers due to its electron-rich thiophene moiety.
• Dye & Pigment Manufacturing: Acts as a key intermediate in the production of specialized dyes and organic pigments, where the benzothiophene unit contributes to color and stability.
• Organic Synthesis & Catalysis: Employed in academic and industrial laboratories as a versatile substrate for cross-coupling reactions, carboxylate derivatization, and heterocyclic chemistry.
• Chemical Reference Standard: Supplied as a high-purity analytical standard for quality control and method development in analytical laboratories.

Basic Information

Product Name	5-Methylbenzo[B]Thiophene-3-Carboxylic Acid
CAS No.	2084-24-4
Molecular Formula	C10H8O2S
Molecular Weight	192.23 g/mol
Synonyms	5-Methyl-1-benzothiophene-3-carboxylic acid; 5-Methylbenzo[b]thiophene-3-carboxylic acid; 3-Carboxy-5-methylbenzo[b]thiophene; 5-Methylbenzo[b]thien-3-carboxylic acid; 5-Methyl-3-benzothiophenecarboxylic acid; 5-Methyl-1-benzothiophene-3-carboxylic acid; 5-Methylbenzothiophene-3-carboxylic acid; 2084-24-4 (CAS)
EINECS	Contact for details

Quality Control

Our production of 5-Methylbenzo[B]Thiophene-3-Carboxylic Acid adheres to stringent in-process controls and final release testing to ensure batch-to-batch consistency and high purity. Quality is verified through modern analytical techniques including HPLC, GC, and NMR spectroscopy. A comprehensive Certificate of Analysis (COA) detailing identity, purity, and impurity profiles is provided with each shipment. We operate under a quality management system and can support regulatory documentation requirements for research and commercial applications.

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. For long-term storage, consider storing under an inert atmosphere to maintain optimal purity.

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 (as Pb)	≤ 20 ppm

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