Description

4-Ethynylphthalic Anhydride is a high-value, multifunctional aromatic anhydride monomer featuring a reactive ethynyl group. This unique structure makes it a critical building block for the synthesis of advanced polymers and specialty chemicals, offering exceptional thermal stability and cross-linking capabilities. It is primarily sought after by R&D and production teams in the pharmaceutical, advanced material, and electronics industries for developing high-performance resins, adhesives, and pharmaceutical intermediates.

Application

• Polymer Synthesis: Key monomer for producing polyimides, polyamides, and other high-temperature polymers used in aerospace and electronics.
• Thermoset Resins: Serves as a cross-linking agent in epoxy and other resin systems to enhance thermal and mechanical properties.
• Pharmaceutical Intermediates: Used in the synthesis of complex drug molecules and active pharmaceutical ingredients (APIs).
• Electronic Materials: Component in the manufacture of dielectric materials, encapsulants, and photoresists for microelectronics.
• Adhesives & Coatings: Imparts improved heat resistance and durability to specialty adhesives and protective coatings.
• Liquid Crystal Polymers (LCPs): Building block for high-performance LCPs used in demanding engineering applications.
• Academic & Industrial R&D: Valuable reagent for exploring new material science and organic synthesis pathways.

Basic Information

Product Name	4-Ethynylphthalic Anhydride
CAS No.	73819-76-8
Molecular Formula	C10H4O3
Molecular Weight	172.14 g/mol
Synonyms	4-Ethynylphthalic Anhydride; 4-Ethynyl-1,3-isobenzofurandione; 1,3-Dioxo-1,3-dihydroisobenzofuran-4-ylethyne; 4-Ethynylbenzene-1,2-dicarboxylic Anhydride; 4-Ethynylphthalic Acid Anhydride; 4-Ethynyl-1,3-dihydro-2-benzofuran-1,3-dione; 4-(Ethynyl)phthalic Anhydride
EINECS	Contact for details

Quality Control

Our 4-Ethynylphthalic Anhydride is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing, including HPLC, NMR, and FTIR, to ensure high purity and consistency. A comprehensive Certificate of Analysis (COA) detailing identity, purity, and impurity profiles is provided with every shipment 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 area at room temperature (15-25°C). Due to its hygroscopic nature, the container must be kept tightly sealed to exclude moisture. Keep away from incompatible materials such as strong bases, amines, and alcohols.

Specification

Item	Specification
Appearance	White to off-white powder
Identification (IR)	Conforms to structure
Purity (HPLC)	≥ 98.0%
Melting Point	Contact for details
Loss on Drying	≤ 1.0%
Heavy Metals	< 20 ppm

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