Description

5-(Phenylethynyl)Isophthalic Acid is a high-purity aromatic dicarboxylic acid derivative featuring a rigid, linear phenylethynyl substituent. This compound is valued for its role as a key monomer and building block in the synthesis of advanced polymers and specialty materials. It is primarily sought by R&D chemists and process engineers in the polymer, pharmaceutical, and advanced materials sectors for creating high-performance products.

Application

• High-Performance Polymer Synthesis: A critical monomer for producing polyimides, polyamides, and polyesters with enhanced thermal stability and mechanical properties for aerospace and electronics.
• Liquid Crystal Polymers (LCPs): Serves as a mesogenic unit in the development of LCPs used in precision molded components and high-barrier packaging films.
• Pharmaceutical Intermediates: Used in the research and synthesis of complex drug molecules and active pharmaceutical ingredients (APIs).
• Metal-Organic Frameworks (MOFs): Acts as an organic linker in the construction of porous MOF materials for gas storage, separation, and catalysis.
• Specialty Coatings and Adhesives: Incorporated into formulations to improve chemical resistance, adhesion, and durability in demanding environments.
• Advanced Composite Materials: Utilized as a cross-linking agent or modifier in epoxy and other resin systems for composite materials.

Basic Information

Product Name	5-(Phenylethynyl)Isophthalic Acid
CAS No.	432025-99-5
Molecular Formula	C16H10O4
Molecular Weight	266.25 g/mol
Synonyms	5-(2-Phenylethynyl)isophthalic acid; Isophthalic acid, 5-(phenylethynyl)-; 5-(Phenylethynyl)-1,3-benzenedicarboxylic acid; 5-(Phenylethynyl)benzene-1,3-dicarboxylic acid; PEIPA; 432025-99-5; 5-(Phenylethynyl)isophthalicacid
EINECS	Contact for details

Quality Control

Our 5-(Phenylethynyl)Isophthalic Acid is manufactured under a strict quality management system. Every batch undergoes rigorous analytical testing, including HPLC, NMR, and FTIR, to ensure identity, purity, and consistency meet the highest standards. A comprehensive Certificate of Analysis (COA) detailing all specifications is provided with each shipment and is available upon request.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at a controlled room temperature (15-25°C). Keep away from strong oxidizing agents, strong bases, and sources of ignition. The container should be kept tightly sealed to minimize exposure to atmospheric moisture.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Melting Point	Contact for details
Loss on Drying	≤ 0.5%
Residue on Ignition	≤ 0.1%
Heavy Metals (as Pb)	≤ 10 ppm

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