Description

Benzoic Acid, 4-[(Chlorosulfonyl)Methyl]-, Methyl Ester is a specialized organic synthesis intermediate featuring a reactive chlorosulfonyl group. This compound matters for its role as a key building block in the production of more complex molecules, particularly in fine chemical and pharmaceutical manufacturing. It is needed by R&D chemists and process development teams in the pharmaceutical, agrochemical, and advanced material sectors for constructing sulfonamide derivatives and other functionalized aromatic systems.

Application

• Pharmaceutical Intermediate: Serves as a crucial precursor in the synthesis of active pharmaceutical ingredients (APIs), especially those containing sulfonamide moieties.
• Agrochemical Synthesis: Used in the development of novel herbicides, fungicides, and pesticides where the benzenesulfonyl chloride derivative is a key functional handle.
• Dyestuff and Pigment Manufacturing: Acts as an intermediate for producing sulfonated dyes and specialty colorants.
• Polymer Modification: Employed to introduce sulfonyl chloride groups into polymer chains for subsequent functionalization, enhancing material properties.
• Chemical Research & Development: A valuable reagent in academic and industrial labs for exploring new organic reactions and creating compound libraries.
• Liquid Crystal and Electronic Material Precursor: Used in the synthesis of advanced organic materials for electronic applications.

Basic Information

Product Name	Benzoic Acid, 4-[(Chlorosulfonyl)Methyl]-, Methyl Ester
CAS No.	130047-14-2
Molecular Formula	C9H9ClO4S
Molecular Weight	248.68 g/mol
Synonyms	Methyl 4-(Chlorosulfonylmethyl)benzoate; 4-(Chlorosulfonylmethyl)benzoic Acid Methyl Ester; Benzoic Acid, 4-(Chlorosulfonylmethyl)-, Methyl Ester; Methyl p-(Chlorosulfonylmethyl)benzoate; α-(Chlorosulfonyl)-p-toluic Acid Methyl Ester; (4-Methoxycarbonylphenyl)methanesulfonyl Chloride
EINECS	Contact for details

Quality Control

Our Benzoic Acid, 4-[(Chlorosulfonyl)Methyl]-, Methyl Ester is produced under strict quality management systems. Every batch undergoes rigorous analytical testing to ensure identity, purity, and consistency. A comprehensive Certificate of Analysis (COA) detailing purity (typically by HPLC or GC), assay, and impurity profiles is provided with each shipment to support your quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated place at room temperature (15-25°C). This material is hygroscopic (moisture-sensitive); keep the container tightly sealed to prevent degradation from atmospheric moisture. Keep away from heat, sparks, and open flame.

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
Loss on Drying	≤ 1.0%
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.