Description

Sulphonyl Diisocyanate CAS NO 4223-09-0 is a specialized organic compound belonging to the diisocyanate class, characterized by its reactive isocyanate (-NCO) functional groups. This compound is a crucial building block in polymer chemistry, enabling the synthesis of high-performance polyurethanes, polyureas, and other advanced materials with tailored properties. It is primarily sought by R&D chemists and manufacturers in the coatings, adhesives, sealants, and elastomers (CASE) industries, as well as in the development of specialty polymers for demanding applications.

Application

• Polyurethane Synthesis: A key monomer for producing specialty polyurethane resins with enhanced chemical resistance and mechanical strength.
• High-Performance Coatings: Used in formulating advanced industrial, marine, and automotive coatings that require durability and weatherability.
• Adhesives and Sealants: Serves as a cross-linking agent to create strong, flexible, and moisture-curing adhesives and sealants.
• Elastomer Production: Integral in manufacturing polyurea and polyurethane elastomers for gaskets, rollers, and impact-resistant parts.
• Polymer Modification: Employed to modify the properties of existing polymers, introducing sulfonyl groups for improved thermal stability or solubility.
• Chemical Intermediate: Acts as a versatile intermediate in organic synthesis for pharmaceuticals, agrochemicals, and other fine chemicals.
• Composite Materials: Used in the production of fiber-reinforced plastics and composite materials requiring a robust polymer matrix.
• Research & Development: Essential for academic and industrial R&D focused on novel polymer architectures and functional materials.

Basic Information

Product Name	Sulphonyl Diisocyanate
CAS No.	4223-09-0
Molecular Formula	C8H4N2O5S
Molecular Weight	240.19 g/mol
Synonyms	4,4'-Sulfonyldiphenyl diisocyanate; Bis(4-isocyanatophenyl) sulfone; SDI; Sulfonylbis(4,1-phenylene) diisocyanate; 4,4'-Diisocyanatodiphenyl sulfone; DIDS; Bis(4-isocyanophenyl) sulfone; SDPI
EINECS	224-189-2

Quality Control

Our Sulphonyl Diisocyanate is manufactured under strict quality management systems. Each batch undergoes comprehensive analytical testing, including assay, purity profiling, and impurity identification, to ensure it meets precise specifications for industrial and research applications. Certificates of Analysis (COA) documenting all critical parameters are available upon request to support your quality assurance and regulatory compliance needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at a controlled room temperature (15-25°C). This product is hygroscopic (moisture-sensitive) and must be kept under a dry inert atmosphere (e.g., nitrogen or argon) to prevent degradation and polymerization. Keep away from heat, sparks, open flames, and incompatible materials such as alcohols, amines, and water.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0 %
Melting Point	Contact for details
Water Content (KF)	≤ 0.1 %
Free Isocyanate Monomer	Contact for details

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