Description

4-Isocyanatobenzoyl Chloride is a versatile and highly reactive bifunctional organic intermediate that combines an isocyanate group with an acid chloride moiety. This dual functionality makes it a critical building block for synthesizing advanced polymers and specialty chemicals with tailored properties. It is essential for manufacturers in the agrochemical, pharmaceutical, and high-performance materials sectors seeking to develop novel compounds, including polyurethanes, amides, and urea derivatives.

Application

• Pharmaceutical Intermediates: Key precursor in the synthesis of active pharmaceutical ingredients (APIs), particularly for compounds requiring benzoyl or urea linkages.
• Agrochemical Synthesis: Used in the production of herbicides, fungicides, and pesticides, where its reactive groups enable the creation of potent bioactive molecules.
• Polymer & Resin Manufacturing: Serves as a cross-linking agent and monomer for producing specialized polyurethanes, polyamides, and other high-performance polymers.
• Dye & Pigment Industry: Intermediate in the synthesis of complex organic dyes and pigments, contributing to color fastness and stability.
• Liquid Crystal & OLED Materials: Building block for creating advanced organic electronic materials used in displays and lighting.
• Adhesive & Coating Formulations: Imparts durability and chemical resistance when incorporated into specialty adhesives and industrial coatings.
• Chemical Research & Development: Valuable reagent in organic synthesis for introducing both isocyanate and acyl chloride functionalities in a single step.

Basic Information

Product Name	4-Isocyanatobenzoyl Chloride
CAS No.	3729-21-3
Molecular Formula	C8H4ClNO2
Molecular Weight	181.58 g/mol
Synonyms	p-Isocyanatobenzoyl chloride; 4-Carboxybenzoyl isocyanate chloride; Benzoyl chloride, 4-isocyanato-; 1-Chloro-4-isocyanatobenzene-1-carbonyl; Isocyanic acid, (4-chlorocarbonylphenyl) ester; NSC 403119; 4-Isocyanato-benzoyl chloride
EINECS	223-082-1

Quality Control

Our 4-Isocyanatobenzoyl Chloride is produced under stringent quality management systems. Every batch undergoes comprehensive analytical testing, including HPLC, GC, and NMR, to ensure high purity and consistency. A detailed Certificate of Analysis (COA) is provided with each shipment, confirming compliance with agreed specifications. We adhere to cGMP principles where applicable to support our customers in regulated industries.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at temperatures between 2°C and 8°C (refrigerated) to maximize stability. Due to its hygroscopic and highly volatile nature, containers must be kept tightly sealed under an inert atmosphere (e.g., nitrogen or argon) after opening to prevent moisture absorption and decomposition. Keep away from strong bases, alcohols, amines, and water.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid or solid
Identification (IR)	Conforms
Purity (HPLC)	≥ 98.0%
Water Content (KF)	≤ 0.5%

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