CAS 98-09-9

Benzenesulfonyl Chloride, also known as phenylsulfonyl chloride, has CAS No.98-09-9 and the molecular formula C₆H₅ClO₂S. It falls under the category of sulfur-containing organic compounds. Under ambient conditions, it is a colourless to pale-yellow oily liquid with a sharp, pungent odour. As an electrophilic sulfonyl halide, it readily hydrolyses upon contact with water and produces hydrochloric acid as a by-product. It dissolves readily in common aprotic organic solvents yet reacts vigorously with nucleophilic substances such as amines and alcohols. Thanks to its highly reactive -SO₂Cl functional group, it is widely utilised in sulfonylation reactions to produce sulfonamides, sulfonate esters and a wide range of fine-chemical derivatives across multiple industrial sectors.

Industrial-grade Benzenesulfonyl Chloride from Shandong Xima Supply Chain is a trusted sulfur-bearing organic intermediate for pharmaceutical manufacturers, agrochemical producers and fine-chemical synthesis laboratories worldwide. Its core characteristic derives from the electrophilic sulfonyl-chloride functional group bonded to the benzene ring. This distinct molecular structure enables efficient sulfonylation transformations under mild-to-moderate reaction conditions. Compared with less-selective sulfonation feedstocks, benzenesulfonyl chloride delivers targeted substitution for amine and hydroxyl groups, minimising unwanted by-product formation within multi-step synthetic workflows. Operators must bear in mind its moisture-sensitive nature; prolonged exposure to humid environments triggers hydrolysis and diminishes product performance.

A key advantage of our benzenesulfonyl chloride is its strict limits on critical impurities, including free acid, benzene-derived residues and benzenesulfonic acid formed through hydrolysis. Excess free-acid impurities can shift reaction pH and reduce target-product yields during sulfonamide synthesis. Our industrial-grade material keeps these undesirable trace components within narrow technical specifications, which are validated via gas chromatography and titration testing. Its favourable solubility in aprotic reaction solvents also facilitates feeding and homogeneous mixing inside reactor systems, eliminating extra pre-treatment steps for plant-scale synthesis operations.

Buyers gain tangible operational and commercial benefits by choosing our reliable benzenesulfonyl-chloride supply. Consistent impurity control stabilises reaction conversion rates and reduces downstream purification workload, lowering raw-material losses and production-related costs on client-side manufacturing lines. Our flexible bulk-inventory capacity supports both long-term framework contracts and urgent spot-order requests for pharmaceutical-intermediate plants and chemical-synthesis facilities. Customers can maintain uninterrupted production cycles without frequent supplier changes. Every shipment includes complete official documentation to streamline import-customs clearance and internal quality-audit procedures for overseas industrial enterprises.

These performance claims are backed by our rigorous supply-chain-control protocols. Each incoming batch of benzenesulfonyl chloride undergoes representative sampling and in-house laboratory testing prior to dispatch. Test metrics include GC-measured purity, visual appearance, free-acid content and relevant impurity levels. All measured results are documented on each lot's Certificate of Analysis. Our benzenesulfonyl chloride has been exported for sulfonylation-reaction projects within pharmaceutical and agrochemical sectors, earning repeat orders from industrial end-users. We only source material from audited upstream manufacturers that hold valid hazardous-chemical production permits to guarantee consistent raw-material quality.

Global chemical purchasers commonly express concerns regarding purity drift, elevated free-acid levels, incomplete hazard-related documentation and inconsistent delivery timelines for corrosive, moisture-sensitive organic intermediates. As a licensed hazardous-chemical supply-chain trader, Shandong Xima carries out comprehensive pre-shipment inspections for every benzenesulfonyl-chloride consignment. We maintain adequate safety stock for standard industrial-grade specifications to address urgent procurement requests. A full documentation package consisting of GHS-compliant MSDS, batch-specific COA, commercial invoice and packing list is prepared for customs-compliance purposes. Our technical-support team can provide practical best-practice guidance covering sealed storage, low-humidity handling and corrosion protection to assist on-site plant operators in safely working with this reactive sulfonyl-halide compound.

If you are sourcing qualified industrial-grade Benzenesulfonyl Chloride for sulfonylation reactions, pharmaceutical-intermediate synthesis or agrochemical raw-material preparation, please do not hesitate to contact us. We support bulk wholesale, sample requests and consultations for custom-specification requirements. Request your latest quotation and full specification sheet today.

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