Description

4-Methylbenzyl Isocyanate is a versatile aromatic isocyanate monomer essential for introducing reactive isocyanate functionality into advanced chemical syntheses. Its primary value lies in serving as a key building block for the production of specialized polymers, agrochemicals, and pharmaceutical intermediates. This compound is particularly needed by R&D chemists and process engineers in the pharmaceutical, agrochemical, and specialty polymer industries for developing novel urethane-based materials and active ingredients.

Application

• Pharmaceutical Intermediate: A key precursor in the synthesis of active pharmaceutical ingredients (APIs), particularly those containing urea or urethane linkages.
• Agrochemical Synthesis: Used in the manufacture of herbicides, fungicides, and pesticides, where it acts as a reactive linker to create bioactive molecules.
• Polymer & Resin Production: Serves as a monomer for producing polyurethanes, polyureas, and other specialty polymers with tailored properties for coatings, adhesives, and elastomers.
• Crosslinking Agent: Functions as an effective crosslinker in polymer chemistry to enhance the thermal and mechanical stability of resins.
• Chemical Research & Development: Employed in organic synthesis for constructing complex molecular architectures via isocyanate-chemistry, such as in the creation of novel heterocycles.
• Surface Modification: Used to modify material surfaces by grafting isocyanate groups, which can then react with amines or alcohols to impart new functionalities.

Basic Information

Product Name	4-Methylbenzyl Isocyanate
CAS No.	56651-57-1
Molecular Formula	C9H9NO
Molecular Weight	147.17 g/mol
Synonyms	p-Tolylmethyl isocyanate; (4-Methylphenyl)methyl isocyanate; 4-Methylbenzyl isocyanate; α-Isocyanato-4-methyltoluene; 1-Isocyanatomethyl-4-methylbenzene; p-Xylyl isocyanate; 4-Methylbenzylisocyanate; NSC 163957
EINECS	Contact for details

Quality Control

Our 4-Methylbenzyl Isocyanate is manufactured under strict quality management systems. Every batch undergoes rigorous analytical testing, including chromatography and spectroscopy, to ensure high purity and consistency. Certificates of Analysis (COA) documenting identity, assay, and impurity profiles are available upon request to support your quality assurance and regulatory compliance needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at a recommended temperature of 2-8°C. This product is hygroscopic (moisture-sensitive) and should be handled under a dry inert atmosphere (e.g., nitrogen or argon) to prevent degradation and polymerization.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms
Assay (HPLC)	≥ 98.0%
Water Content (KF)	≤ 0.1%
Related Substances (HPLC)	Total impurities ≤ 2.0%
Density (at 20°C)	~1.05 g/cm³

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