Description

4-(Chlorosulfonyl)Phenyl Isocyanate is a highly reactive bifunctional intermediate containing both an isocyanate and a sulfonyl chloride group. This unique structure makes it a critical building block for synthesizing advanced polymers and specialty chemicals with tailored properties. It is essential for R&D and production in industries such as pharmaceuticals, agrochemicals, and high-performance materials.

Application

• Pharmaceutical Intermediates: Key precursor in the synthesis of sulfonylurea-based drugs and other active pharmaceutical ingredients (APIs).
• Agrochemical Synthesis: Used to create novel herbicides, fungicides, and insecticides with specific activity profiles.
• Polymer Modification: Serves as a cross-linking agent or functional monomer for producing polyurethanes, polyamides, and other specialty polymers with enhanced chemical resistance.
• Dye and Pigment Manufacturing: Intermediate for creating sulfonated azo dyes and high-performance pigments.
• Surface Coatings: Imparts durability and adhesion properties in advanced industrial and automotive coatings.
• Chemical Research: Valuable reagent in organic synthesis for introducing both isocyanate and sulfonamide functionalities.

Basic Information

Product Name	4-(Chlorosulfonyl)Phenyl Isocyanate
CAS No.	6752-38-1
Molecular Formula	C7H4ClNO3S
Molecular Weight	217.63 g/mol
Synonyms	p-Isocyanatobenzenesulfonyl Chloride; 4-Isocyanatobenzenesulfonyl Chloride; 1-Isocyanato-4-(chlorosulfonyl)benzene; Benzenesulfonyl chloride, 4-isocyanato-; NSC 403119; Phenyl Isocyanate, 4-(chlorosulfonyl)-
EINECS	Contact for details

Quality Control

Our 4-(Chlorosulfonyl)Phenyl Isocyanate is manufactured under strict quality management systems. Each batch undergoes comprehensive analytical testing, including HPLC, IR, and titration methods, to ensure high purity and consistency. A Certificate of Analysis (COA) detailing all specifications is provided with every shipment to guarantee compliance with your project requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at 2-8°C under an inert atmosphere (e.g., nitrogen or argon). Due to its hygroscopic and highly volatile nature, containers must be kept sealed and allowed to reach room temperature before opening to minimize moisture ingress and vapor release.

Specification

Item	Specification
Appearance	White to off-white crystalline solid
Identification (IR)	Conforms
Assay (HPLC)	≥ 98.0%
Melting Point	40 - 44 °C
Water Content (KF)	≤ 0.5%

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