Description

5-(Chlorosulfonyl)-2-Methylbenzoic Acid Methyl Ester is a versatile and high-purity chemical intermediate essential for advanced organic synthesis. Its unique structure, featuring both a chlorosulfonyl and a methyl ester group, makes it a critical building block for constructing complex molecules. This compound is primarily sought after by research and development teams in the pharmaceutical and agrochemical industries for the synthesis of novel active ingredients and fine chemicals.

Application

• Pharmaceutical Intermediate: Key precursor in the synthesis of active pharmaceutical ingredients (APIs), particularly for sulfonamide-based drugs and other bioactive molecules.
• Agrochemical Synthesis: Used in the research and production of advanced herbicides, fungicides, and pesticides, leveraging its reactive chlorosulfonyl group.
• Fine Chemical Production: Serves as a crucial building block for creating complex dyes, pigments, and specialty polymers.
• Chemical Research & Development: Employed in academic and industrial R&D labs for method development and the creation of novel chemical entities.
• Material Science: Potential intermediate in the development of advanced materials, including liquid crystals and organic semiconductors.

Basic Information

Product Name	5-(Chlorosulfonyl)-2-Methylbenzoic Acid Methyl Ester
CAS No.	866358-17-0
Molecular Formula	C9H9ClO4S
Molecular Weight	248.68 g/mol
Synonyms	Methyl 5-(Chlorosulfonyl)-2-methylbenzoate; 2-Methyl-5-(chlorosulfonyl)benzoic Acid Methyl Ester; Benzoic acid, 5-(chlorosulfonyl)-2-methyl-, methyl ester; Methyl 2-methyl-5-sulfonylchloridebenzoate
EINECS	Contact for details

Quality Control

Every batch of 5-(Chlorosulfonyl)-2-Methylbenzoic Acid Methyl Ester is produced and tested under strict quality management protocols to ensure consistency and high purity suitable for sensitive synthetic applications. Our products undergo rigorous quality testing, including chromatographic purity analysis and identity confirmation, to ensure compliance with industry standards. Certificates of Analysis (COA) are available upon request, providing full transparency on batch-specific specifications.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at a controlled room temperature (typically 15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed to prevent degradation from atmospheric moisture. Keep away from incompatible materials such as strong bases and oxidizing agents.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Related Substances (HPLC)	Total impurities ≤ 2.0%
Water Content (KF)	≤ 0.5%
Residue on Ignition	≤ 0.1%

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