Description

4-[(5-Isocyanato-2-Methylphenyl)Methyl]-m-Phenylene Diisocyanate is a specialized aromatic diisocyanate monomer, a key building block in the synthesis of high-performance polyurethane materials. Its unique asymmetrical structure, incorporating a methyl-substituted phenyl ring, imparts distinct reactivity profiles and final polymer properties compared to conventional diisocyanates like TDI or MDI. This compound is essential for formulators and polymer chemists in industries requiring tailored polyurethane systems with specific mechanical, thermal, or processing characteristics.

Application

• High-Performance Polyurethane Elastomers: Used as a core monomer to produce elastomers with enhanced toughness, abrasion resistance, and dynamic properties for industrial wheels, seals, and gaskets.
• Specialty Polyurethane Coatings & Adhesives: Imparts excellent chemical resistance, adhesion, and durability in advanced coating formulations for automotive, aerospace, and industrial maintenance applications.
• Thermosetting Polyurethane Resins: Serves as a cross-linking agent in resin systems for composites, electrical encapsulation, and potting compounds.
• Modified Isocyanate Prepolymers: A critical intermediate for synthesizing custom prepolymers with controlled NCO content and reactivity for sealant and adhesive production.
• Polymer Research & Development: A valuable reagent for academic and industrial R&D focused on developing novel polyurethane architectures with targeted properties.

Basic Information

Item	Detail
Product Name	4-[(5-Isocyanato-2-Methylphenyl)Methyl]-m-Phenylene Diisocyanate
CAS No.	94213-39-5
Molecular Formula	C16H12N2O2
Molecular Weight	264.28 g/mol
Synonyms	1,3-Bis(isocyanatomethyl)-5-(5-isocyanato-2-methylbenzyl)benzene; 1,3-Diisocyanatomethyl-5-[(5-isocyanato-2-methylphenyl)methyl]benzene; Asymmetric Trimethylolpropane-based Trisocyanate; Modified TDI Trimer; m-TMXDI (common industry abbreviation); 4-[(5-Isocyanato-o-tolyl)methyl]-1,3-phenylene diisocyanate; BIT-3NCO
EINECS	Contact for details

Quality Control

Every batch of 4-[(5-Isocyanato-2-Methylphenyl)Methyl]-m-Phenylene Diisocyanate is manufactured and tested under a strict quality management system. We ensure consistent purity, reactivity, and performance through advanced analytical techniques including HPLC, GC, and titration methods. A comprehensive Certificate of Analysis (COA) detailing assay, isocyanate (NCO) content, hydrolyzable chlorine, and solvent content is provided with each shipment to guarantee it meets your specific application requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at temperatures between 2°C and 25°C. Due to its hygroscopic and moisture-sensitive nature, containers must be kept tightly sealed under a dry inert atmosphere (e.g., nitrogen or dry air) to prevent reaction with atmospheric moisture and carbon dioxide, which can lead to polymerization or urea formation. Keep away from heat, open flames, and incompatible materials such as alcohols, amines, acids, and water.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms
Assay (HPLC)	≥ 99.0 %
NCO Content (Titration)	31.0 - 32.0 %
Hydrolyzable Chlorine	≤ 0.01 %
Viscosity (at 25°C)	Contact for details
Specific Gravity (at 25°C)	Contact for details

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