Description

Methyl 3-(Chlorosulfonyl)-4-Methoxybenzoate is a high-value, multi-functional chemical intermediate characterized by its reactive chlorosulfonyl and ester functional groups. This compound is essential for the synthesis of complex molecules, offering a versatile building block for introducing specific sulfonamide or sulfonate moieties. It is primarily sought after by research institutions and manufacturers in the pharmaceutical and agrochemical industries for developing new active ingredients and fine chemicals.

Application

• Pharmaceutical Intermediate: Key precursor in the synthesis of sulfonamide-based drug candidates, including enzyme inhibitors and receptor antagonists.
• Agrochemical Synthesis: Used in the development of novel herbicides, fungicides, and plant growth regulators.
• Material Science Research: Serves as a monomer or cross-linking agent for creating specialty polymers with specific functional properties.
• Dye and Pigment Manufacturing: Intermediate for producing sulfonated colorants and advanced organic pigments.
• Chemical Biology & Proteomics: Utilized as a reactive handle for bioconjugation and labeling of biomolecules.
• Custom Synthesis & Contract Manufacturing: Supplied to CDMOs for the production of bespoke compounds and advanced intermediates.

Basic Information

Product Name	Methyl 3-(Chlorosulfonyl)-4-Methoxybenzoate
CAS No.	192323-12-9
Molecular Formula	C9H9ClO5S
Molecular Weight	264.68 g/mol
Synonyms	3-(Chlorosulfonyl)-4-methoxybenzoic acid methyl ester; Methyl 4-methoxy-3-sulfonylchloridebenzoate; Benzoic acid, 3-(chlorosulfonyl)-4-methoxy-, methyl ester; 4-Methoxy-3-(chlorosulfonyl)benzoic acid methyl ester
EINECS	Contact for details

Quality Control

Our production of Methyl 3-(Chlorosulfonyl)-4-Methoxybenzoate adheres to stringent in-process controls to ensure batch-to-batch consistency and high purity. Every lot is fully characterized and tested against comprehensive specifications. Certificates of Analysis (COA) detailing identity, purity, and impurity profiles are 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, and well-ventilated place at a controlled room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed after opening to prevent degradation. 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.