Description

4-Ethylphenyl Isocyanate is a versatile aromatic isocyanate monomer essential for introducing the 4-ethylphenyl moiety into advanced chemical structures. Its high reactivity makes it a critical building block for synthesizing specialized polymers and fine chemicals where specific aromatic functionality is required. This compound is particularly valuable for manufacturers in the agrochemical, pharmaceutical, and advanced materials sectors seeking to develop products with tailored properties.

Application

• Agrochemical Intermediates: Key precursor in the synthesis of modern pesticides, herbicides, and fungicides, where it acts as a linker for bioactive molecules.
• Pharmaceutical Synthesis: Used in creating active pharmaceutical ingredients (APIs) and drug candidates, particularly those requiring urea or carbamate functional groups.
• Polymer & Resin Production: Serves as a monomer for producing specialized polyurethanes, polyureas, and other polymers with enhanced chemical resistance or specific mechanical properties.
• Crosslinking Agent: Employed in coatings, adhesives, and elastomers to improve durability, hardness, and thermal stability.
• Chemical Research & Development: A valuable reagent in organic synthesis for constructing complex molecules in academic and industrial R&D laboratories.
• Dye & Pigment Manufacturing: Intermediate in the production of high-performance dyes and organic pigments.

Basic Information

Product Name	4-Ethylphenyl Isocyanate
CAS No.	23138-50-3
Molecular Formula	C9H9NO
Molecular Weight	147.17 g/mol
Synonyms	1-Isocyanato-4-ethylbenzene; p-Ethylphenyl isocyanate; 4-Ethylbenzene isocyanate; 4-Ethylbenzenisocyanate; (4-Ethylphenyl)carbimide; NSC 406924; 4-EPI
EINECS	Contact for details

Quality Control

Our 4-Ethylphenyl Isocyanate is manufactured under stringent quality management systems. Every batch undergoes comprehensive analytical testing, including assay by GC or HPLC, identity confirmation (IR), and impurity profiling, to ensure it meets the high-purity standards required for industrial and research applications. Certificates of Analysis (COA) documenting all critical parameters are available upon request to support your quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). This product is hygroscopic (moisture-sensitive) and must be kept under an inert atmosphere (e.g., nitrogen or argon) after opening to prevent degradation and polymerization. Keep away from heat, sparks, open flames, and incompatible materials such as alcohols, amines, and strong bases.

Specification

Item	Specification
Appearance	Clear, colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Assay (GC/HPLC)	≥ 98.0%
Water Content (KF)	≤ 0.1%
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.