Description

1-Chloro-4-(4-Chloro-3-Isocyanato-Phenyl)Sulfonyl-2-Isocyanato-Benzene is a high-purity, multi-functional aromatic diisocyanate compound, serving as a critical building block for advanced polymer synthesis. Its core value lies in providing a reactive, symmetrical backbone that enables the creation of materials with enhanced thermal stability, chemical resistance, and mechanical properties. This specialized intermediate is essential for manufacturers in the polyurethane, specialty coatings, adhesives, and high-performance elastomer industries seeking to develop next-generation products.

Application

• Polyurethane Elastomers: As a key diisocyanate component for producing high-durability, wear-resistant elastomers used in industrial wheels, seals, and gaskets.
• Specialty Coatings & Paints: For formulating advanced polyurethane coatings that offer superior weatherability, chemical resistance, and adhesion for automotive, aerospace, and marine applications.
• High-Performance Adhesives & Sealants: In the synthesis of polyurethane-based adhesives requiring excellent bonding strength, flexibility, and environmental stability.
• Thermoset Resins: As a cross-linking agent for creating rigid foams and composite matrices with enhanced flame retardancy and thermal properties.
• Pharmaceutical & Agro-Intermediate Synthesis: Serving as a versatile precursor in the multi-step synthesis of complex organic molecules for active ingredients.
• Polyimide & Polyamide Precursor: In the production of high-temperature resistant polymers for electronics and advanced material science.

Basic Information

Product Name	1-Chloro-4-(4-Chloro-3-Isocyanato-Phenyl)Sulfonyl-2-Isocyanato-Benzene
CAS No.	6338-60-9
Molecular Formula	C14H6Cl2N2O5S
Molecular Weight	385.18 g/mol
Synonyms	Bis(4-chloro-3-isocyanatophenyl) sulfone; 3,3'-Sulfonylbis(6-chlorophenyl isocyanate); 4,4'-Sulfonylbis(2-chlorophenyl isocyanate); 1,1'-Sulfonylbis(4-chloro-3-isocyanatobenzene); DIDS (Dichlorodisocyanatodiphenyl sulfone); NSC 403116; 6,6'-Dichloro-3,3'-sulfonyldiphenyl diisocyanate
EINECS	Contact for details

Quality Control

Our 1-Chloro-4-(4-Chloro-3-Isocyanato-Phenyl)Sulfonyl-2-Isocyanato-Benzene is manufactured under stringent process controls to ensure batch-to-batch consistency and high purity. Quality is verified through a comprehensive suite of analytical techniques including HPLC, FT-IR, and titration methods. A Certificate of Analysis (COA) detailing purity, isocyanate content, and impurity profiles is provided with each shipment to support your quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at a controlled room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed under a dry inert atmosphere (e.g., nitrogen or argon) to prevent hydrolysis and degradation of the isocyanate groups. Isolate from moisture, strong bases, alcohols, and amines.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.5%
Isocyanate Content (Titration)	20.8 - 21.8 % (Theoretical: 21.8%)
Hydrolyzable Chlorine	≤ 0.1%
Melting Point	145 - 150 °C
Loss on Drying	≤ 0.5%

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