Description

5-(Chlorosulfonyl)-2-Methylbenzoyl Chloride is a highly reactive bifunctional aromatic intermediate, serving as a critical building block in advanced organic synthesis. Its dual reactive sites (acyl chloride and sulfonyl chloride) enable efficient, sequential functionalization, making it invaluable for creating complex molecular architectures. This compound is primarily sought by R&D chemists and process development scientists in the pharmaceutical and agrochemical industries for constructing active pharmaceutical ingredients (APIs) and specialized crop protection agents.

Application

• Pharmaceutical Intermediate: Key precursor in the synthesis of sulfonamide-based drugs and other bioactive molecules targeting various therapeutic areas.
• Agrochemical Synthesis: Building block for developing novel herbicides, fungicides, and insecticides with specific modes of action.
• Dye and Pigment Manufacturing: Used in the production of specialized azo dyes and high-performance pigments.
• Polymer Chemistry: Monomer or cross-linking agent for creating specialty polymers with unique thermal or chemical resistance properties.
• Chemical Research & Development: Versatile reagent for exploring new synthetic pathways and creating custom chemical libraries.
• Material Science: Intermediate in the development of advanced materials, such as liquid crystals or organic semiconductors.

Basic Information

Product Name	5-(Chlorosulfonyl)-2-Methylbenzoyl Chloride
CAS No.	1426437-45-7
Molecular Formula	C9H6Cl2O3S
Molecular Weight	265.11 g/mol
Synonyms	2-Methyl-5-(chlorosulfonyl)benzoyl chloride; 5-Chlorosulfonyl-2-methylbenzoyl chloride; 2-Methyl-5-sulfonylchloride benzoyl chloride; o-Toluic acid, 5-(chlorosulfonyl)-, chloride; Benzoyl chloride, 5-(chlorosulfonyl)-2-methyl-; 5-(Chlorosulphonyl)-2-methylbenzoyl chloride
EINECS	Contact for details

Quality Control

Every batch of 5-(Chlorosulfonyl)-2-Methylbenzoyl Chloride is manufactured and tested under a strict quality management system. We provide comprehensive analytical data to ensure the material meets the high-purity standards required for sensitive synthetic applications. A detailed Certificate of Analysis (COA) is supplied with each shipment, reporting key parameters such as assay, identity, and impurity profiles.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at a controlled room temperature (15-25°C). Due to its hygroscopic and highly volatile nature, the container must be kept tightly sealed under an inert atmosphere (e.g., nitrogen or argon) after opening to prevent moisture absorption and decomposition. Keep away from strong bases, oxidizing agents, and sources of ignition.

Specification

Item	Specification
Appearance	White to off-white crystalline powder or solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Purity (GC)	≥ 97.0%
Water Content (KF)	≤ 0.5%
Melting Point	Contact for details

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