Description

Benzenesulfonyl Isocyanate is a versatile and highly reactive organic intermediate used in the synthesis of sulfonylurea derivatives and other functionalized compounds. Its core value lies in its ability to act as a sulfonylating and isocyanating agent, enabling the efficient construction of complex molecular architectures critical for advanced material and pharmaceutical development. This compound is essential for R&D chemists and process engineers in the agrochemical, pharmaceutical, and specialty chemical industries seeking to develop new active ingredients and performance materials.

Application

• Agrochemical Intermediate: Key building block for the synthesis of modern sulfonylurea herbicides, which are known for their high activity and selectivity.
• Pharmaceutical Synthesis: Used in the preparation of sulfonamide-based drug candidates, including protease inhibitors and receptor antagonists.
• Polymer Modification: Serves as a functional monomer or cross-linking agent to introduce sulfonyl isocyanate groups into polymer chains, enhancing material properties.
• Chemical Research & Development: A valuable reagent for organic synthesis, particularly in reactions requiring the introduction of the benzenesulfonyl moiety.
• Dye and Pigment Manufacturing: Intermediate in the production of specialized colorants and functional dyes.
• Ligand and Catalyst Design: Used to create novel ligands for metal complexes in catalytic applications.

Basic Information

Product Name	Benzenesulfonyl Isocyanate
CAS No.	2845-62-7
Molecular Formula	C7H5NO3S
Molecular Weight	183.18 g/mol
Synonyms	Benzenesulfonyl Isocyanate; Phenylsulfonyl Isocyanate; Benzenesulphonyl Isocyanate; Isocyanic Acid Benzenesulfonyl Ester; Benzenesulfonoyl Isocyanate; BSI; NSC 403119
EINECS	220-639-5

Quality Control

Our Benzenesulfonyl Isocyanate is manufactured under strict quality control protocols to ensure batch-to-batch consistency and high purity. We employ advanced analytical techniques, including HPLC, GC, and NMR, to verify identity and quantify impurities. A comprehensive Certificate of Analysis (COA) detailing purity, assay, and impurity profiles is provided with each 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 a controlled room temperature (15-25°C). Due to its hygroscopic and moisture-sensitive nature, the container must be kept tightly sealed under an inert atmosphere (e.g., nitrogen or argon) after opening to prevent decomposition. Keep away from heat, sparks, open flames, and incompatible materials such as water, alcohols, amines, and strong bases.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Water Content (KF)	≤ 0.5%

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