Description

4-[(3-Isocyanato-o-Tolyl)Methyl]-1,3-Phenylene Diisocyanate is a specialized aromatic diisocyanate monomer, a key building block in the synthesis of high-performance polyurethane polymers. Its unique asymmetrical structure, featuring a methyl-substituted aromatic ring, provides enhanced reactivity profiles and tailored polymer properties compared to conventional diisocyanates. This compound is essential for manufacturers in the coatings, adhesives, sealants, and elastomers (CASE) industries, as well as for advanced material research, where precise control over polymer architecture and final product performance is required.

Application

• High-Performance Polyurethane Coatings: Used as a cross-linking agent to formulate advanced industrial, automotive, and protective coatings with superior chemical resistance, durability, and weatherability.
• Specialty Adhesives & Sealants: A critical raw material for producing high-strength, flexible polyurethane adhesives and sealants used in construction, automotive assembly, and aerospace applications.
• Elastomer Production: Serves as a core monomer for manufacturing cast, thermoplastic, and millable polyurethane elastomers, which are valued for their exceptional abrasion resistance and mechanical strength.
• Advanced Material Research: Employed in R&D laboratories for synthesizing novel polyurethane foams, composites, and other polymeric materials with customized thermal and mechanical properties.
• Binder Systems: Utilized in the formulation of binders for foundry sands, abrasives, and composite materials, providing excellent binding strength and thermal stability.
• Waterborne Polyurethane Dispersions (PUDs): A key intermediate for developing environmentally friendly, low-VOC waterborne polyurethane systems for coatings and finishes.

Basic Information

Product Name	4-[(3-Isocyanato-o-Tolyl)Methyl]-1,3-Phenylene Diisocyanate
CAS No.	94213-41-9
Molecular Formula	C17H12N2O4
Molecular Weight	308.29 g/mol
Synonyms	1,3-Phenylene Diisocyanate, 4-[(3-Isocyanato-2-methylphenyl)methyl]-; 4-[(3-Isocyanato-2-methylbenzyl)]-1,3-diisocyanatobenzene; Asymmetric Tolylene Diisocyanate Derivative; 3-Isocyanato-2-methylbenzyl 2,4-Diisocyanatobenzene; BITDI Derivative; m-TMXDI (related structural analog); 2-Methyl-1,3-bis(isocyanatomethyl)benzene Isomer; Custom Aromatic Diisocyanate Monomer
EINECS	Contact for details

Quality Control

Every batch of 4-[(3-Isocyanato-o-Tolyl)Methyl]-1,3-Phenylene Diisocyanate is manufactured and tested under a strict quality management system. We ensure compliance with relevant industry standards and customer-specific requirements. Comprehensive analytical testing, including assay by titration, isomer content analysis, and determination of hydrolyzable chlorine, is performed to guarantee product consistency and purity. A detailed Certificate of Analysis (COA) is provided with each shipment to document critical quality parameters.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at a recommended temperature of 15-25°C. This product is hygroscopic (moisture-sensitive) and must be kept under a dry inert atmosphere (e.g., nitrogen or dry air) to prevent reaction with atmospheric moisture, which can lead to polymerization or gel formation. Keep away from heat, open flames, and sources of ignition. Separate from incompatible materials such as alcohols, amines, acids, and water.

Specification

Item	Specification
Appearance	Clear, colorless to pale yellow liquid
Identification (IR)	Conforms
Assay (NCO Content)	≥ 99.0 %
Isomer Purity (HPLC)	≥ 98.0 %
Hydrolyzable Chlorine	≤ 0.01 %
Viscosity (at 25°C)	Contact for details
Specific Gravity (at 25°C)	Contact for details
Moisture (Karl Fischer)	≤ 0.05 %

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