Product Overview

Benzenesulfonic acid is an organic compound with the molecular formula C₆H₆O₃S and molecular weight of 158.17 g/mol. This white to off-white crystalline solid or flake is a valuable intermediate in pharmaceutical, agrochemical, and organic synthesis research. The compound features a sulfonic acid group attached to a benzene ring.

Synthetic Process

• Sulfonation: Benzene is sulfonated using concentrated sulfuric acid or oleum to yield benzenesulfonic acid

• Purification: The crude product is purified by recrystallization from suitable solvents

• Drying: The purified product is dried under vacuum

Mechanism of Action

• Strong Acid: The sulfonic acid group is a strong acid that can protonate a wide range of substrates

• Catalyst: Acts as an acid catalyst in various organic transformations

• Electrophilic Aromatic Substitution: The sulfonic acid group is a meta-directing group

Research Applications & Market Significance

• Pharmaceutical Research: Building block for drug discovery programs

• Organic Synthesis: Used as an acid catalyst and intermediate in various organic transformations

• Agrochemical Synthesis: Intermediate for pesticide development

• Dye Synthesis: Intermediate for azo dyes and other colorants

Quality Specifications

• Purity: ≥98.0% determined by HPLC

• Melting point: 44-48°C (hydrate)

• Loss on drying: ≤0.5%

• Storage: 2-8°C, sealed, protected from light

• Stable for 24 months when properly stored

Packaging & Shipping

• Research quantities: 25g, 100g amber glass bottles

• Bulk quantities: 500g, 1kg amber glass bottles

• Shipped at ambient temperature