Description

2-Thiophenecarbonyl Chloride, 5-Butyl- (9Ci) is a specialized organosulfur compound that serves as a versatile acylating agent and a key synthetic intermediate. Its value lies in its ability to introduce the 5-butyl-2-thiophenecarbonyl moiety into target molecules, enabling the construction of complex chemical architectures. This product is essential for researchers and manufacturers in the pharmaceutical and agrochemical industries, particularly for the development of novel active ingredients and functional materials.

Application

• Pharmaceutical Intermediate: A key building block in the synthesis of active pharmaceutical ingredients (APIs), especially for compounds targeting central nervous system (CNS) disorders and other therapeutic areas.
• Agrochemical Synthesis: Used in the research and production of advanced pesticides, herbicides, and fungicides, where the thiophene ring contributes to biological activity.
• Material Science Research: Employed as a monomer or precursor in the development of conductive polymers, organic semiconductors, and specialty polymers with unique electronic properties.
• Ligand and Catalyst Development: Serves as a precursor for creating novel ligands used in asymmetric catalysis and metal-organic frameworks (MOFs).
• Fine Chemical Synthesis: Acts as a crucial reagent for the acylation of amines and alcohols to produce amides and esters with thiophene functionality for various specialty chemicals.

Basic Information

Item	Details
Product Name	2-Thiophenecarbonyl Chloride, 5-Butyl- (9Ci)
CAS No.	64964-19-8
Molecular Formula	C9H11ClOS
Molecular Weight	202.70 g/mol
Synonyms	5-Butyl-2-thiophenecarbonyl chloride; 5-Butylthiophene-2-carbonyl chloride; 5-n-Butylthiophene-2-carboxylic acid chloride; 2-Thiophenecarbonyl chloride, 5-butyl-; 5-Butyl-2-thenoyl chloride; 5-Butylthiophene-2-carboxyl chloride; 5-Butyl-2-thiophenecarboxylic acid chloride
EINECS	Contact for details

Quality Control

Our 2-Thiophenecarbonyl Chloride, 5-Butyl- (9Ci) is produced under strict quality management protocols. Every batch undergoes rigorous analytical testing, including chromatography and spectroscopy, to ensure high purity and consistent performance. A comprehensive Certificate of Analysis (COA) detailing identity, purity, and impurity profiles is provided with each shipment to support your quality assurance and regulatory needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at room temperature (15-25°C). This compound is hygroscopic (moisture-sensitive) and reacts with strong acids/organic solvents; therefore, it must be kept under an inert atmosphere (e.g., nitrogen or argon) and away from incompatible materials.

Specification

Item	Specification
Appearance	Clear, colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Assay (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.