27886-58-4

Basic information

• Product Name: 2-Chloro-benzenesulfonic acid
• Synonyms: 2-Chloro-benzenesulfonic acid;o-Chlorobenzenesulfonic acid
• CAS NO: 27886-58-4
• Molecular Formula: C₆H₅ClO₃S
• Molecular Weight: 193
• Mol File: 27886-58-4.mol
• Article Data: 9

Chemical Properties

• Appearance: /
• Density: 1.551
• PKA: -1.12±0.15(Predicted)
• CAS DataBase Reference: 2-Chloro-benzenesulfonic acid(CAS DataBase Reference)
• NIST Chemistry Reference: 2-Chloro-benzenesulfonic acid(27886-58-4)
• EPA Substance Registry System: 2-Chloro-benzenesulfonic acid(27886-58-4)

Safety Data

• Hazardous Substances Data: 27886-58-4(Hazardous Substances Data)

Usage

General Description

2-Chloro-benzenesulfonic acid, also known as chlorobenzenesulfonic acid, is a chemical compound consisting of a benzene ring with a chlorine atom and a sulfonic acid group attached to it. It is an organic compound that is widely used in the production of dyes, pigments, and pharmaceuticals. It is also a versatile intermediate in the synthesis of various other chemicals. 2-Chloro-benzenesulfonic acid is a strong acid and is corrosive in nature, and it should be handled with care. It is soluble in water and other polar solvents, making it useful for various chemical reactions and applications.

Upstream product

• 20677-52-5 3-chlorobenzenesulphonic acid 
• 2905-23-9 2-chlorophenylsulfonyl chloride 
• 75-34-3 1,1-dichloroethane 
• 7446-11-9 sulfur trioxide 
• 108-90-7 chlorobenzene 
• 7732-18-5 water 
• 7494-46-4 phenyl-methanesulfonic acid ; sodium salt 
• 7782-50-5 chlorine 
• 98-11-3 benzenesulfonic acid 
• 71-43-2 benzene 
• 38980-51-7 1-chloro-2-(4-chlorophenylsulfonyl)benzene 

Downstream Products

• 98-66-8 4-chloro-benzenesulfonic acid 
• 78846-76-1 2-chloro-4-nitrobenzene sulfonic acid 

Relevant articles and documents

Aryl sulfonic acid ammonium salt compound, preparation method and application thereof (by machine translation)

The invention discloses a aryl sulfonic acid ammonium salt compound, preparation method and application thereof, the main process expressed as follows: formula (I) indicated by the aryl sulfonic acid compound crude product as raw material, in the solvent with the structural formula (II) shown in mixed organic amine, to form the structural formula (III) as shown by a aryl sulfonic acid ammonium salt; the resulting structural formula (III) aryl sulfonic acid ammonium salt shown by the alkali soluble acid or directly to obtain the acid of formula (I) shown in the purification of compounds such as aryl sulfonic acid. The invention is primarily embodied in the [...]: through the low quality aryl sulfonic acid compound refining, effectively reduces the content of harmful impurities, improve the quality of the aryl sulfonic acid compound, reducing the pressure of the downstream use, the process is stable. (by machine translation)

Preparation method of aromatic sulfonic acid compound

The invention discloses a preparation method of an aromatic sulfonic acid compound, and aims to provide the preparation method of the aromatic sulfonic acid compound, wherein the method is simple in process, low in equipment requirements, high in capacity, wide in raw material sources and small in environmental influence. The method is characterized by comprising the steps: with a starting material aromatic amine compound, dissolving in an acid, carrying out a diazotization reaction with sodium nitrite to prepare a diazocompound; carrying out a reaction of a catalyst cuprous salt with a thionyl chloride aqueous solution, and carrying out a sulfonylation reaction with the prepared diazocompound to obtain an aromatic sulfonyl chloride compound or an aromatic sulfonyl chloride hydrochloride compound, next hydrolyzing to obtain a crude product aromatic sulfonic acid compound, finally purifying through a beating way by an acidic solvent and an alcohol solution, and thus obtaining the high-purity aromatic sulfonic acid compound. The method is friendly to environment, has certain cost advantages, avoids use of more expensive aromatic thiol compounds as starting materials, and is beneficial for industrial production.

Clean-chemistry sulfonation of aromatics

A solution of TFAA/H2SO4 is an atom-efficient liquid-phase system for rapid sulfonation of aromatic structures; H2SO4 is consumed stoichiometrically and the spent trifluoroacetic anhydride (TFAA) is readily recovered as trifluoroacetic acid (TFA) which can be recycled to TFAA.