Description

4-Chloro-3-Methylsulfonyl-Benzoic Acid is a high-purity, functionalized benzoic acid derivative characterized by its chloro and methylsulfonyl substituents. This compound serves as a versatile and critical pharmaceutical intermediate and organic synthesis building block, enabling the construction of complex molecules for active pharmaceutical ingredients (APIs) and advanced materials. It is essential for manufacturers and R&D teams in the pharmaceutical, agrochemical, and specialty chemical sectors seeking reliable, high-quality raw materials for synthesis and process development.

Application

• Pharmaceutical Intermediate: Key building block in the synthesis of novel Active Pharmaceutical Ingredients (APIs), particularly for drugs targeting inflammation, metabolic disorders, and central nervous system (CNS) conditions.
• Agrochemical Synthesis: Used in the research and production of advanced herbicides, fungicides, and plant growth regulators, leveraging its reactive sites for molecular diversification.
• Organic Synthesis Reagent: Serves as a precursor for further chemical transformations, including esterification, amidation, and nucleophilic substitution reactions in fine chemical manufacturing.
• Material Science Research: Employed in the development of specialty polymers, liquid crystals, and organic electronic materials due to its polar sulfonyl group and aromatic core.
• Chemical Reference Standard: Utilized as a high-purity analytical standard in quality control (QC) and research laboratories for method development and validation.

Basic Information

Product Name	4-Chloro-3-Methylsulfonyl-Benzoic Acid
CAS No.	51522-07-7
Molecular Formula	C8H7ClO4S
Molecular Weight	234.66 g/mol
Synonyms	3-(Methylsulfonyl)-4-chlorobenzoic Acid; 4-Chloro-3-methanesulfonylbenzoic Acid; Benzoic acid, 4-chloro-3-(methylsulfonyl)-; 4-Chloro-3-(methylsulfonyl)benzoic Acid; 4-Chloro-3-mesylbenzoic Acid; 51522-07-7; 4-Chloro-3-methylsulphonylbenzoic acid
EINECS	Contact for details

Quality Control

Our 4-Chloro-3-Methylsulfonyl-Benzoic Acid is manufactured under a strict quality management system. Every batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation (IR, NMR), to ensure it meets exacting specifications for use as a pharmaceutical intermediate. Certificates of Analysis (COA) documenting all critical quality attributes are available upon request to support your regulatory and quality assurance needs.

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 bases and oxidizing agents.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥98.0%
Loss on Drying	≤0.5%
Residue on Ignition	≤0.1%
Heavy Metals	≤20 ppm
Related Substances (HPLC)	Individual impurity ≤0.5%; Total impurities ≤1.5%

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