Description

4-Chlorothiobenzoic Acid S-Methyl Ester is a versatile sulfur-containing aromatic building block of significant interest in advanced organic synthesis. This compound matters for its role as a key intermediate in the production of pharmaceuticals, agrochemicals, and functional materials, enabling the introduction of the thiobenzoate moiety. Industrial researchers and process chemists in fine chemical and active pharmaceutical ingredient (API) development need this high-purity intermediate for constructing complex molecular architectures.

Application

• Pharmaceutical Intermediate: A critical precursor in the synthesis of drug candidates, particularly those containing thioester or modified benzoic acid functionalities.
• Agrochemical Synthesis: Used in the research and production of novel herbicides, fungicides, and insecticides where the chlorothiobenzoate group is integral to biological activity.
• Ligand and Catalyst Development: Serves as a starting material for creating specialized ligands used in transition metal catalysis and organocatalysis.
• Polymer and Material Science: Employed in the synthesis of monomers and additives to impart specific chemical or physical properties to advanced polymers.
• Chemical Research & Development: A valuable reagent for method development and exploring new reaction pathways in academic and industrial R&D laboratories.

Basic Information

Product Name	4-Chlorothiobenzoic Acid S-Methyl Ester
CAS No.	5925-67-7
Molecular Formula	C8H7ClOS
Molecular Weight	186.66 g/mol
Synonyms	4-Chlorobenzenecarbothioic acid S-methyl ester; Methyl 4-chlorothiobenzoate; p-Chlorothiobenzoic acid methyl ester; S-Methyl 4-chlorobenzenecarbothioate; 4-Chlorobenzoic acid thio-methyl ester; 5925-67-7; Thiobenzoic acid, 4-chloro-, S-methyl ester
EINECS	227-667-3

Quality Control

Our 4-Chlorothiobenzoic Acid S-Methyl Ester is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation via FT-IR and NMR, to ensure it meets the high standards required for synthetic applications. A comprehensive Certificate of Analysis (COA) detailing purity, impurity profile, and physical characteristics is provided with every shipment.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at controlled room temperature (15-25°C). Keep away from strong oxidizing agents and bases.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (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.