Description

Benzoic Acid, 5-(Chlorosulfonyl)-2-Methyl- (9Ci) is a specialized aromatic sulfonyl chloride derivative, serving as a critical high-purity synthetic intermediate. Its value lies in its dual reactive sites—the chlorosulfonyl group and the carboxylic acid—which enable precise chemical modifications for creating advanced molecular architectures. This compound is essential for research chemists and process development scientists in the pharmaceutical and agrochemical industries, where it is used to build complex active ingredients and functional materials.

Application

• Pharmaceutical Intermediate: Key building block for the synthesis of novel sulfonamide-based drugs, including enzyme inhibitors and receptor antagonists.
• Agrochemical Synthesis: Used in the production of advanced herbicides and fungicides, leveraging its reactive groups to create targeted bioactive molecules.
• Dyestuff & Pigment Manufacturing: Serves as a precursor for synthesizing specialized azo dyes and high-performance pigments.
• Polymer Chemistry: Employed as a monomer or cross-linking agent to introduce sulfonyl chloride functionality into polymers for specialty applications.
• Chemical Research & Development: A versatile reagent for organic synthesis, particularly in reactions requiring selective sulfonylation or further derivatization of the benzoic acid core.
• Liquid Crystal & Electronic Material Precursor: Used in the synthesis of organic electronic materials and liquid crystal compounds due to its rigid aromatic structure and modifiable functional groups.

Basic Information

Product Name	Benzoic Acid, 5-(Chlorosulfonyl)-2-Methyl- (9Ci)
CAS No.	89001-57-0
Molecular Formula	C8H7ClO4S
Molecular Weight	234.66 g/mol
Synonyms	2-Methyl-5-(chlorosulfonyl)benzoic acid; 5-(Chlorosulfonyl)-2-methylbenzoic acid; 2-Methyl-5-sulfonylchloride benzoic acid; 3-Carboxy-4-methylbenzenesulfonyl chloride; 4-Methyl-3-carboxybenzenesulfonyl chloride; Benzoic acid, 5-(chlorosulfonyl)-2-methyl-
EINECS	Contact for details

Quality Control

Our Benzoic Acid, 5-(Chlorosulfonyl)-2-Methyl- is produced under strict quality management systems. Each batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure it meets the high standards required for synthetic applications. Certificates of Analysis (COA) detailing purity, assay, and impurity profiles are available upon request to support your quality assurance and regulatory documentation.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated place at a controlled room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature and reactivity as a strong acid/organic solvent derivative, the container must be kept sealed under an inert atmosphere (e.g., nitrogen or argon) when not in use to prevent hydrolysis and degradation. Keep away from heat, open flames, and incompatible materials such as bases, amines, and alcohols.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Melting Point	Contact for details
Water Content (KF)	≤ 0.5%
Related Substances (HPLC)	Individual impurity ≤ 0.5%; Total impurities ≤ 2.0%

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