Description

5-Chlorosulfonyl-2-Hydroxy-4-Methyl-Benzoic Acid Methyl Ester CAS NO 699016-44-9 is a versatile and high-value chemical intermediate characterized by its reactive chlorosulfonyl and ester functional groups. This compound matters for its critical role in the synthesis of complex molecules, particularly in pharmaceutical development where it serves as a key building block for active pharmaceutical ingredients (APIs). It is primarily needed by research institutions and manufacturers in the pharmaceutical, agrochemical, and specialty chemical industries for constructing sulfonamide derivatives and other fine chemicals.

Application

• Pharmaceutical Intermediate: A crucial building block in the synthesis of novel sulfonamide-based drugs and active pharmaceutical ingredients (APIs).
• Agrochemical Synthesis: Used in the research and production of advanced herbicides, fungicides, and pesticides.
• Dye and Pigment Manufacturing: Serves as a precursor for synthesizing specialized dyes and organic pigments.
• Polymer Modification: Employed to introduce functional sulfonyl groups into polymer chains for enhanced properties.
• Chemical Research & Development: A valuable reagent in organic synthesis for creating complex molecular architectures in academic and industrial R&D.
• Ligand Synthesis for Catalysis: Used to prepare specialized ligands for metal-catalyzed reactions.

Basic Information

Product Name	5-Chlorosulfonyl-2-Hydroxy-4-Methyl-Benzoic Acid Methyl Ester
CAS No.	699016-44-9
Molecular Formula	C9H9ClO5S
Molecular Weight	264.68 g/mol
Synonyms	Methyl 5-(Chlorosulfonyl)-2-hydroxy-4-methylbenzoate; 2-Hydroxy-4-methyl-5-chlorosulfonylbenzoic Acid Methyl Ester; Benzoic acid, 5-(chlorosulfonyl)-2-hydroxy-4-methyl-, methyl ester; Methyl 2-hydroxy-4-methyl-5-sulfonylchloridebenzoate
EINECS	Contact for details

Quality Control

Our 5-Chlorosulfonyl-2-Hydroxy-4-Methyl-Benzoic Acid Methyl Ester is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing, including HPLC, NMR, and IR spectroscopy, to ensure high purity and consistency. Certificates of Analysis (COA) detailing purity, identity, and impurity profiles are provided with every shipment to support your quality assurance and regulatory compliance needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at room temperature (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%
Loss on Drying	≤ 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.