Description

(5-Methyl-1,3-Phenylene)Diisocyanate is a specialized aromatic diisocyanate monomer used in the synthesis of high-performance polyurethane materials. Its value lies in its unique asymmetrical methyl-substituted structure, which imparts tailored reactivity and final polymer properties compared to conventional diisocyanates. This compound is essential for R&D and production in industries such as specialty coatings, adhesives, and elastomers where specific mechanical and chemical resistance profiles are required.

Application

• Specialty Polyurethane Prepolymers: Serves as a key building block for formulating prepolymers with controlled reactivity and functionality.
• High-Performance Coatings & Paints: Used in the synthesis of polyurethane resins for industrial, automotive, and marine coatings requiring enhanced durability, gloss, and chemical resistance.
• Advanced Adhesives & Sealants: Imparts strong bonding strength and flexibility in formulations for demanding applications in construction, aerospace, and automotive assembly.
• Elastomers and Castable Urethanes: A critical monomer for producing elastomeric parts, gaskets, wheels, and rollers with excellent abrasion resistance and load-bearing capacity.
• Polymer Modification & Cross-linking Agent: Used to modify and cross-link various polymers to improve thermal stability, hardness, and solvent resistance.
• Chemical Intermediate for R&D: Employed in organic synthesis and pharmaceutical research to create novel compounds, including potential active pharmaceutical ingredients (APIs) and agrochemicals.

Basic Information

Product Name	(5-Methyl-1,3-Phenylene)Diisocyanate
CAS No.	14219-05-7
Molecular Formula	C9H6N2O2
Molecular Weight	174.16 g/mol
Synonyms	1,3-Diisocyanato-5-methylbenzene; 5-Methyl-m-phenylene Diisocyanate; TMI (common trade name); m-Tolylene Diisocyanate isomer; 3,5-Diisocyanatotoluene; 5-Methyl-1,3-benzenediisocyanate; 5-Methyl-m-phenylenediisocyanate; Asymmetric Tolylene Diisocyanate
EINECS	Contact for details

Quality Control

Our (5-Methyl-1,3-Phenylene)Diisocyanate is manufactured under stringent quality management systems. Every batch undergoes rigorous analytical testing to ensure high purity and consistency, meeting the precise requirements of advanced polyurethane chemistry. A comprehensive Certificate of Analysis (COA) detailing purity, isomer content, and impurity profiles is provided with each shipment to guarantee traceability and compliance with your specifications.

Storage

Preserve in a tightly closed container, protected from light. Store under a dry inert atmosphere (e.g., nitrogen or argon) at 2-8°C to minimize oxidation and polymerization. Due to its highly volatile and moisture-sensitive nature, the container must be kept tightly sealed in a cool, dry, and well-ventilated area, away from heat, sparks, and open flames. Keep away from water, alcohols, amines, and other compounds containing active hydrogen.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms
Assay (HPLC)	≥ 98.5%
Isomer Content (2,4-/2,6- TDI)	≤ 0.5%
Hydrolyzable Chlorine	≤ 50 ppm
Total Chlorine	≤ 100 ppm
Water Content (Karl Fischer)	≤ 0.05%

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