Description

4,4'-(Ethyne-1,2-Diyl)Diphthalic Anhydride is a high-purity, specialized aromatic dianhydride monomer. This compound is a critical building block for the synthesis of advanced polyimides and other high-performance polymers. It is essential for manufacturers and R&D facilities in the electronics, aerospace, and specialty plastics industries seeking to develop materials with exceptional thermal stability and mechanical properties.

Application

• Primary monomer for the synthesis of polyimide resins and copolymers.
• Key precursor in the production of high-temperature adhesives and coatings for aerospace applications.
• Building block for photosensitive polyimides (PSPI) used in semiconductor manufacturing and microelectronics.
• Raw material for liquid crystal polymers (LCPs) and other engineering thermoplastics.
• Intermediate in organic synthesis for advanced organic electronic materials, such as those used in OLEDs.
• Research and development of novel gas separation membranes and high-performance composites.

Basic Information

Product Name	4,4'-(Ethyne-1,2-Diyl)Diphthalic Anhydride
CAS No.	129808-00-0
Molecular Formula	C20H6O6
Molecular Weight	342.26 g/mol
Synonyms	4,4'-(1,2-Ethanediyl)bis[1,3-isobenzofurandione]; 4,4'-(Ethyne-1,2-diyl)bis(phthalic anhydride); 1,1'-(1,2-Ethynediyl)bis[3-isobenzofurandione]; 4,4'-(1,2-Ethynediyl)diphthalic anhydride; EDPA; Biphenyl-4,4'-diyl-2,2'-bis(phthalic anhydride) (related structure); Acetylene-linked diphthalic anhydride; Contact for details on additional trade names.
EINECS	Contact for details

Quality Control

Our 4,4'-(Ethyne-1,2-Diyl)Diphthalic Anhydride is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing, including HPLC and FTIR, to ensure high purity and consistency suitable for demanding polymerization processes. Certificates of Analysis (COA) detailing purity, identity, and impurity profiles are provided with every shipment to guarantee reliable performance in your formulations.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). This material is hygroscopic (moisture-sensitive); containers must be kept tightly sealed to prevent degradation from atmospheric moisture. Keep away from incompatible materials such as strong bases, amines, and alcohols.

Specification

Item	Specification
Appearance	Off-white to pale yellow crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Melting Point	Contact for details
Loss on Drying	≤ 0.5%
Heavy Metals (as Pb)	≤ 10 ppm
Solubility	Soluble in polar aprotic solvents (e.g., NMP, DMF)

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