Description

3-Thiophenecarbonyl Chloride, 5-Ethyl- (9Ci) is a specialized heterocyclic building block and key acyl chloride intermediate used in advanced organic synthesis. Its value lies in enabling the efficient introduction of the 5-ethylthiophene-3-carbonyl moiety into target molecules, facilitating the development of novel compounds with tailored properties. This high-purity reagent is essential for researchers and process chemists in the pharmaceutical, agrochemical, and materials science industries, particularly for constructing complex molecular architectures in drug discovery and functional material development.

Application

• Pharmaceutical Intermediate: A key building block for synthesizing active pharmaceutical ingredients (APIs), especially in the development of novel heterocyclic compounds with potential therapeutic activity.
• Agrochemical Synthesis: Used in the research and production of advanced pesticides, herbicides, and fungicides where the thiophene scaffold imparts specific biological activity.
• Material Science & Organic Electronics: Serves as a precursor for monomers and functionalized molecules used in conductive polymers, organic semiconductors, and non-linear optical materials.
• Ligand & Catalyst Development: Employed to create novel ligands for metal complexes and catalysts used in asymmetric synthesis and cross-coupling reactions.
• Chemical Research & Development: A versatile reagent in academic and industrial R&D for exploring new synthetic pathways and creating custom chemical entities.
• Dye & Pigment Intermediate: Used in the synthesis of specialized dyes and pigments where the thiophene ring contributes to color and stability properties.

Basic Information

Product Name	3-Thiophenecarbonyl Chloride, 5-Ethyl- (9Ci)
CAS No.	95330-74-8
Molecular Formula	C7H7ClOS
Molecular Weight	174.65 g/mol
Synonyms	5-Ethylthiophene-3-carbonyl chloride; 5-Ethyl-3-thenoyl chloride; 3-Thenoyl chloride, 5-ethyl-; 5-Ethyl-3-thiophenecarboxylic acid chloride; 5-Ethyl-3-thienoyl chloride; 5-Ethyl-3-thiophenecarbonyl chloride; 95330-74-8; 5-Ethylthiophene-3-carboxylic acid chloride
EINECS	Contact for details

Quality Control

Our 3-Thiophenecarbonyl Chloride, 5-Ethyl- (9Ci) is manufactured under strict quality control protocols to ensure batch-to-batch consistency and high purity suitable for sensitive synthetic applications. We provide comprehensive Certificates of Analysis (COA) with each batch, detailing key parameters such as purity, identity, and impurity profiles. Our quality commitment aligns with cGMP principles where applicable, supporting its use in regulated research and development.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area away from incompatible materials such as strong bases, alcohols, and amines. Recommended storage temperature is 2-8°C for long-term stability. The compound is moisture-sensitive; containers must be kept tightly sealed under an inert atmosphere (e.g., nitrogen or argon) to prevent hydrolysis.

Specification

Item	Specification
Appearance	Clear to pale yellow liquid
Identification (IR)	Conforms to structure
Purity (HPLC)	≥ 97.0%
Water Content (KF)	≤ 0.5%

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