Description

5-(p-Isocyanatobenzyl)-6-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, featuring both a benzyl isocyanate and a methyl-substituted phenylene diisocyanate group, imparts tailored reactivity and final polymer properties. This compound is essential for manufacturers in the coatings, adhesives, sealants, and elastomers (CASE) industries seeking to develop products with specific mechanical strength, chemical resistance, and thermal stability.

Application

• High-Performance Polyurethane Coatings: Used as a cross-linking agent to formulate advanced industrial, automotive, and marine coatings with superior durability, gloss retention, and resistance to chemicals and weathering.
• Specialty Adhesives and Sealants: Serves as a core component in the production of structural and elastic adhesives and sealants, offering excellent bonding strength and flexibility for construction, aerospace, and automotive applications.
• Polyurethane Elastomers: A critical monomer for manufacturing cast, thermoplastic, and millable elastomers used in gaskets, rollers, wheels, and other demanding mechanical parts.
• Advanced Composite Materials: Employed in the synthesis of polyurethane matrices for fiber-reinforced composites, enhancing interlaminar shear strength and impact resistance.
• Chemical Intermediate: Utilized in organic synthesis to introduce isocyanate functionality for further reactions, enabling the creation of custom polymers, dendrimers, and other advanced materials.
• Waterborne Polyurethane Dispersions (PUDs): A key raw material for developing environmentally friendly, low-VOC PUDs used in leather finishing, textile coatings, and wood finishes.

Basic Information

Item	Details
Product Name	5-(p-Isocyanatobenzyl)-6-Methyl-m-Phenylene Diisocyanate
CAS No.	82151-48-2
Molecular Formula	C16H12N2O2
Molecular Weight	264.28 g/mol
Synonyms	1,3-Diisocyanato-5-[(4-isocyanatophenyl)methyl]-2-methylbenzene; 5-(4-Isocyanatobenzyl)-6-methyl-1,3-phenylene diisocyanate; 6-Methyl-5-(4-isocyanatobenzyl)-m-phenylene diisocyanate; Asymmetric methyl-substituted phenylene diisocyanate; TDI derivative (unsymmetrical); BAYTEC® ME 210 (potential trade name analogue); Desmodur® derivative; Isocyanurate precursor monomer.
EINECS	Contact for details

Quality Control

Our production of 5-(p-Isocyanatobenzyl)-6-Methyl-m-Phenylene Diisocyanate adheres to stringent quality management protocols. Every batch undergoes comprehensive analytical testing, including assay (by titration or HPLC), isocyanate content determination, and analysis of key impurities like hydrolyzable chlorine and residual solvents, to ensure high purity and consistent reactivity. A detailed Certificate of Analysis (COA) is provided with each shipment, confirming compliance with agreed specifications. Our quality system supports traceability and meets the demands of global supply chains.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at temperatures between 2°C and 8°C (under refrigeration) or as specified for specific stabilized grades. This product is hygroscopic (moisture-sensitive) and must be kept under a dry inert atmosphere (e.g., nitrogen or dry air) to prevent polymerization and degradation. Isolate from heat, sparks, 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 (NCO Content)	≥ 31.5 %
Purity (HPLC)	≥ 98.0 %
Hydrolyzable Chlorine	≤ 0.01 %
Viscosity (at 25°C)	Contact for details
Specific Gravity (at 25°C)	~1.2 g/cm³

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