Description

4-Phenylethynylphthalic Anhydride is a specialized aromatic anhydride monomer featuring a reactive ethynyl group, making it a valuable building block for high-performance polymers. Its core value lies in its ability to undergo thermal cross-linking reactions, imparting enhanced thermal stability, mechanical strength, and chemical resistance to the final materials. This compound is essential for R&D chemists and material scientists in the advanced polymer, aerospace, and electronics industries seeking to develop next-generation thermosetting resins and composite matrices.

Application

• High-Temperature Thermosetting Polymers: A key monomer for the synthesis of polyimides, polyamides, and other heat-resistant resins used in aerospace and automotive components.
• Electronic Encapsulants & Adhesives: Used in formulations for semiconductor packaging and die-attach adhesives requiring excellent thermal and dielectric properties.
• Composite Matrix Resins: Serves as a cross-linking agent in resin systems for carbon fiber and other advanced composite materials.
• Specialty Coatings: Incorporated into coatings for wires, circuit boards, and industrial equipment that demand superior thermal endurance and chemical inertness.
• Pharmaceutical Intermediate: Utilized in the research and synthesis of complex organic molecules and active pharmaceutical ingredients (APIs).
• Liquid Crystal Polymers (LCPs): Acts as a precursor in the development of high-performance LCPs for connectors and precision molded parts.

Basic Information

Product Name	4-Phenylethynylphthalic Anhydride
CAS No.	119389-05-8
Molecular Formula	C16H8O3
Molecular Weight	248.24 g/mol
Synonyms	4-(Phenylethynyl)phthalic anhydride; 4-Phenylethynylphthalic anhydride; 1,3-Isobenzofurandione, 4-(2-phenylethynyl)-; PE-PA; 4-(2-Phenylethynyl)phthalic anhydride; 4-PEPA; Phenylethynyl phthalic anhydride
EINECS	Contact for details

Quality Control

Every batch of our 4-Phenylethynylphthalic Anhydride is manufactured and tested under a strict quality management system. We ensure compliance with relevant industry standards through rigorous analytical protocols including HPLC, NMR, and FTIR for identity confirmation and purity verification. A comprehensive Certificate of Analysis (COA) detailing batch-specific results is provided with each shipment to guarantee traceability and meet your quality assurance requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept sealed under an inert atmosphere (e.g., nitrogen or argon) after opening to prevent degradation. Keep away from heat, sparks, and open flames.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Purity (HPLC)	≥ 98.0%
Melting Point	Contact for details
Loss on Drying	≤ 0.5%
Heavy Metals	≤ 10 ppm

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