Description

2-Thiophenecarboxylic Acid, 3-(Chlorocarbonyl)-, Methyl Ester (9Ci) is a high-purity, reactive thiophene derivative that serves as a critical building block in advanced organic synthesis. This compound is valued for its bifunctional reactivity, featuring both an acid chloride and an ester group on the thiophene scaffold, enabling precise molecular construction. It is primarily sought after by research and development chemists and process engineers in the pharmaceutical and agrochemical industries for creating novel active ingredients and functional materials.

Application

• Pharmaceutical Intermediate: A key synthon for the development of novel drug candidates, particularly in the synthesis of molecules with thiophene-based heterocyclic cores.
• Agrochemical Synthesis: Used in the research and production of advanced pesticides and herbicides, where the thiophene moiety can impart specific biological activity.
• Material Science Research: Serves as a precursor for functional polymers, liquid crystals, and organic electronic materials due to its conjugated thiophene structure.
• Chemical Research & Development: Employed as a versatile reagent in organic synthesis for constructing complex molecules via amidation, esterification, and cross-coupling reactions.
• Dye and Pigment Intermediate: Utilized in the synthesis of specialized dyes and pigments where thiophene derivatives enhance color properties and stability.

Basic Information

Product Name	2-Thiophenecarboxylic Acid, 3-(Chlorocarbonyl)-, Methyl Ester (9Ci)
CAS No.	116722-19-1
Molecular Formula	C7H5ClO3S
Molecular Weight	204.63 g/mol
Synonyms	3-(Chlorocarbonyl)-2-thiophenecarboxylic acid methyl ester; Methyl 3-(chlorocarbonyl)thiophene-2-carboxylate; 2-Thiophenecarboxylic acid, 3-(chlorocarbonyl)-, methyl ester; 3-Carbomethoxy-2-thiophenecarbonyl chloride; Methyl 3-chloroformylthiophene-2-carboxylate; Thiophene-2,3-dicarboxylic acid 3-chloride 2-methyl ester
EINECS	Contact for details

Quality Control

Our production of 2-Thiophenecarboxylic Acid, 3-(Chlorocarbonyl)-, Methyl Ester (9Ci) adheres to stringent quality management protocols to ensure batch-to-batch consistency and reliability for your critical syntheses. Each lot undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation. Certificates of Analysis (COA) detailing all specifications are provided and available upon request to support your quality assurance and regulatory documentation needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated place at a controlled room temperature (typically 15-25°C). This product is hygroscopic (moisture-sensitive); ensure containers are sealed immediately after use to prevent degradation from atmospheric moisture.

Specification

Item	Specification
Appearance	White to off-white crystalline powder or solid
Identification (IR)	Conforms to structure
Purity (HPLC)	≥ 97.0%
Melting Point	Contact for details
Water Content (KF)	≤ 0.5%
Related Substances (HPLC)	Individual impurity ≤ 1.0%; Total impurities ≤ 3.0%

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