Description

o-[(p-Isocyanatophenyl)Thio]Phenyl Isocyanate is a specialized bifunctional aromatic isocyanate monomer containing a sulfur-based thioether linkage. This unique structure provides enhanced reactivity and serves as a critical building block for synthesizing high-performance polymers with tailored properties. It is essential for manufacturers in the polyurethane, adhesive, and advanced materials sectors seeking to develop products with specific thermal, mechanical, or chemical resistance characteristics.

Application

• Polymer Crosslinking Agent: A key monomer for producing cross-linked polyurethane and polyurea elastomers with improved toughness and chemical resistance.
• Specialty Adhesives & Sealants: Used in formulating high-strength, moisture-curing adhesives and sealants for automotive, aerospace, and construction applications.
• Advanced Coating Resins: Serves as a core component in the synthesis of coatings that require exceptional durability, weatherability, and adhesion to difficult substrates.
• Pharmaceutical & Agrochemical Intermediates: Acts as a versatile building block in the multi-step synthesis of active pharmaceutical ingredients (APIs) and advanced agrochemicals.
• Liquid Crystal Polymers (LCPs): Employed in the production of high-performance LCPs for electronics, optics, and engineering plastics.
• Modifier for Epoxy Systems: Used to modify epoxy resins, enhancing flexibility, impact resistance, and thermal stability of the cured network.

Basic Information

Item	Detail
Product Name	o-[(p-Isocyanatophenyl)Thio]Phenyl Isocyanate
CAS No.	75790-87-3
Molecular Formula	C14H8N2O2S
Molecular Weight	268.29 g/mol
Synonyms	1,1'-Thiobis(4-isocyanatobenzene); Bis(4-isocyanatophenyl) Sulfide; 4,4'-Thiobis(phenyl isocyanate); p,p'-Thiodiphenyl diisocyanate; TDI-Sulfide; 4-Isocyanatophenyl 4-isocyanatophenyl sulfide; Diisocyanatodiphenyl sulfide; NSC 403095
EINECS	Contact for details

Quality Control

Our production of o-[(p-Isocyanatophenyl)Thio]Phenyl Isocyanate adheres to stringent quality management protocols to ensure batch-to-batch consistency and high purity. Each lot is analyzed using advanced techniques including HPLC, GC, and titration to verify critical parameters such as isocyanate content, purity, and the absence of key impurities. A comprehensive Certificate of Analysis (COA) detailing all test results is provided with every shipment to support your quality assurance and regulatory compliance needs.

Storage

Preserve in a tightly closed container, protected from light. Due to its highly volatile and hygroscopic (moisture-sensitive) nature, this material must be stored under a dry, inert atmosphere (e.g., nitrogen or argon) in a cool, well-ventilated area. Recommended storage temperature is 2-8°C to maintain stability and prevent polymerization. Keep away from heat, sparks, open flames, and incompatible materials such as alcohols, amines, and strong bases.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms
Purity (HPLC)	≥ 98.0%
Isocyanate Content (NCO)	30.5 - 31.5 %
Hydrolyzable Chloride	≤ 0.01%
Water Content (Karl Fischer)	≤ 0.05%

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