Description

Diphenyl Isophthalate is a high-purity organic compound widely used as a key intermediate and performance additive. This product is valued for its role in synthesizing advanced polymers and specialty chemicals, offering excellent thermal stability and compatibility. It is essential for manufacturers in the plastics, coatings, and pharmaceutical industries seeking to enhance material properties and develop new formulations.

Application

• Primary monomer or intermediate in the synthesis of high-performance polyesters and polycarbonates.
• Plasticizer and modifier in specialty polymer formulations to improve flexibility and thermal resistance.
• Key raw material for producing liquid crystal polymers (LCPs) and other advanced engineering plastics.
• Intermediate in organic synthesis for pharmaceuticals and agrochemicals.
• Additive in coatings and adhesives to enhance durability and chemical resistance.
• Component in research and development of novel polymeric materials.

Basic Information

Item	Details
Product Name	Diphenyl Isophthalate
CAS No.	744-45-6
Molecular Formula	C20H14O4
Molecular Weight	318.32 g/mol
Synonyms	Diphenyl benzene-1,3-dicarboxylate; Isophthalic acid diphenyl ester; 1,3-Benzenedicarboxylic acid, diphenyl ester; Phenyl isophthalate; Diphenyl 1,3-benzenedicarboxylate; Diphenyl m-phthalate; m-Phthalic acid diphenyl ester
EINECS	212-048-4

Quality Control

Our Diphenyl Isophthalate is produced under a stringent quality management system. Each batch undergoes comprehensive analytical testing to ensure it meets exacting purity and consistency standards. A detailed Certificate of Analysis (COA) is provided with every shipment, confirming specifications for identity, assay, and impurity profiles.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at controlled room temperature (15-25°C). Keep away from heat, open flames, and incompatible materials. The product is light-sensitive and should be stored away from direct light exposure.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms
Assay (HPLC)	≥ 98.0%
Melting Point	136 - 140 °C
Loss on Drying	≤ 0.5%
Residue on Ignition	≤ 0.1%

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