Description

4-Fluorobenzenesulfonic Acid is a versatile organosulfur compound featuring a sulfonic acid group and a fluorine substituent on the benzene ring. This structure makes it a valuable strong acid catalyst and a key synthetic building block for introducing the 4-fluorobenzenesulfonyl moiety into more complex molecules. It is primarily utilized by R&D chemists and process engineers in the pharmaceutical and agrochemical industries for synthesis and catalysis.

Application

• Pharmaceutical Intermediate: Serves as a crucial precursor in the synthesis of active pharmaceutical ingredients (APIs), particularly for sulfonamide-based drugs.
• Agrochemical Synthesis: Used in the manufacture of herbicides, fungicides, and insecticides where the fluorobenzenesulfonyl group enhances biological activity.
• Acid Catalyst: Acts as a strong, organic-soluble acid catalyst in various organic reactions, including esterifications and alkylations.
• Dye and Pigment Manufacturing: Employed as a sulfonating agent and intermediate in the production of specialty dyes and colorants.
• Polymer Modification: Used to introduce sulfonic acid groups into polymers, modifying their properties for ion-exchange or catalytic applications.
• Research & Development: A valuable reagent in academic and industrial R&D labs for exploring new synthetic methodologies and creating novel chemical entities.
• Electrolyte Additive: Investigated for use in advanced battery systems due to its ionic properties.

Basic Information

Product Name	4-Fluorobenzenesulfonic Acid
CAS No.	368-88-7
Molecular Formula	C6H5FO3S
Molecular Weight	176.17 g/mol
Synonyms	p-Fluorobenzenesulfonic Acid; 4-Fluorophenylsulfonic Acid; Benzenesulfonic acid, 4-fluoro-; p-Fluorophenylsulfonic Acid; 4-Fluoro-1-sulfobenzene; 4-FBSA; FBSA; 4-Fluorobenzene-1-sulfonic Acid
EINECS	206-709-2

Quality Control

Our 4-Fluorobenzenesulfonic Acid is manufactured under a strict quality management system. Every batch undergoes comprehensive analytical testing to ensure it meets the highest standards of purity and consistency. A Certificate of Analysis (COA) detailing identity, assay, and impurity profiles is provided with each shipment to guarantee full traceability and compliance with your project requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area away from incompatible materials such as strong bases and oxidizing agents. Recommended storage temperature is 15-25°C. The product is a strong acid/organic solvent; handle with appropriate personal protective equipment in a fume hood.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Water Content (KF)	≤ 1.0%
Melting Point	Contact for details
Heavy Metals (as Pb)	≤ 20 ppm
Residue on Ignition	≤ 0.1%

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