4-PHENYLETHYNYLPHTHALIC ANHYDRIDE / PEPA CAS 119389-05-8

1. Acts PEPA CAS 119389-05-8 as a reactive end-capping agent for synthesizing high-temperature resistant polyimide resins in aerospace applications.

2. Applied 4-PHENYLETHYNYLPHTHALIC ANHYDRIDE in manufacturing advanced composite materials with enhanced mechanical toughness and thermal stability.

3. Utilized as a key intermediate for producing specialty polymers used in electronic insulation and high-performance coatings.

4-Phenylethynylphthalic Anhydride should be stored in a tightly sealed, moisture-proof and light-resistant container at 10–25℃, in a cool, dry and well-ventilated area away from direct sunlight and heat sources. It is prone to hydrolysis upon contact with moisture, so keep it isolated from water, humid environments, strong acids and bases to avoid quality deterioration.

During handling, wear chemical-resistant gloves, goggles and a lab coat, and operate in a fume hood to prevent dust inhalation and skin/eye contact. Reseal the container immediately after use. Dispose of waste strictly following local hazardous chemical regulations.

PEPA CAS 119389-05-8 is a key reactive intermediate mainly used in the synthesis of high-performance polyimide resins. These resins boast excellent thermal stability, mechanical toughness and chemical resistance, which are beneficial for manufacturing aerospace components, high-temperature electronic insulation materials and advanced composite parts that can withstand harsh working environments.