Description

3-(Chlorosulfonyl)-4-Methoxybenzoic Acid is a versatile and high-value aromatic sulfonyl chloride derivative used as a critical synthetic intermediate. Its bifunctional nature, featuring both a reactive sulfonyl chloride group and a carboxylic acid moiety, makes it indispensable for constructing complex molecules in advanced chemical synthesis. This compound is primarily sought after by research institutions and manufacturers in the pharmaceutical and agrochemical sectors for developing active ingredients and novel chemical entities.

Application

• Pharmaceutical Intermediate: Key building block for the synthesis of sulfonamide-based drugs, including enzyme inhibitors and receptor antagonists.
• Agrochemical Synthesis: Used in the production of herbicides, fungicides, and plant growth regulators that require a sulfonyl group for bioactivity.
• Dyestuff and Pigment Manufacturing: Serves as a precursor for creating sulfonated azo dyes and specialty pigments with enhanced properties.
• Polymer Chemistry: Acts as a monomer or cross-linking agent for producing specialty polymers, such as polyamides and polyesters with sulfone linkages.
• Chemical Research & Development: A valuable reagent in organic synthesis for introducing the 3-(chlorosulfonyl)-4-methoxybenzoyl moiety into target molecules.
• Liquid Crystal and Electronic Material Precursor: Used in the synthesis of advanced materials for display technologies and organic electronics.

Basic Information

Product Name	3-(Chlorosulfonyl)-4-Methoxybenzoic Acid
CAS No.	50803-29-7
Molecular Formula	C8H7ClO5S
Molecular Weight	250.66 g/mol
Synonyms	4-Methoxy-3-sulfonylchloride benzoic acid; 3-Chlorosulfonyl-4-methoxybenzoic acid; 4-Methoxy-3-(chlorosulfonyl)benzoic acid; Benzoic acid, 3-(chlorosulfonyl)-4-methoxy-; 3-Carboxy-4-methoxybenzenesulfonyl chloride
EINECS	Contact for details

Quality Control

Our production of 3-(Chlorosulfonyl)-4-Methoxybenzoic Acid adheres to stringent internal quality standards to ensure batch-to-batch consistency and high purity. Each lot is characterized using advanced analytical techniques including HPLC, NMR, and IR spectroscopy. A comprehensive Certificate of Analysis (COA) detailing purity, identity, and impurity profiles is provided with every shipment to support your quality assurance and regulatory needs.

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 and reactivity as a strong acid/organic solvent derivative, the container must be kept tightly sealed under anhydrous conditions to prevent hydrolysis and degradation. Keep away from heat, sparks, open flames, and incompatible materials such as bases, amines, and oxidizing agents.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Melting Point	Contact for details
Loss on Drying	≤ 0.5%
Related Substances (HPLC)	Individual impurity ≤ 0.5%
Total Impurities	≤ 2.0%
Solubility	Soluble in common organic solvents

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