ZC-Isophthalic Acid
ZC-Isophthalic Acid
CAS Number：121-91-5 / 204-506-4
Formula：1,3 C6H4 (CO2H)2
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0CAS Number：121-91-5 / 204-506-4
Formula：1,3 C6H4 (CO2H)2
Product Description
ZC-Isophthalic Acid (IPA) is an aromatic dicarboxylic acid widely used as a key intermediate in the production of high-performance resins and polymers. It is mainly applied in unsaturated polyester resins (UPR), alkyd resins, and PET copolyesters, where it significantly improves thermal stability, chemical resistance, and mechanical strength.
In coatings and fiberglass-reinforced plastics, IPA enhances durability, corrosion resistance, and weatherability, making it suitable for demanding industrial and construction applications. It is also used in engineering plastics and packaging materials to improve clarity and processing performance.
With its excellent balance of rigidity and chemical resistance, Isophthalic Acid is an essential raw material for advanced resin systems used in automotive parts, marine materials, building materials, and high-performance coatings.
Product Characteristics
| Property | Value |
| Chemical family | Aromatic carboxylic acids |
| Molecular weight | 166.13 g/mol |
| Boiling point | Sublimes °C |
| Sublimation point | 260 °C |
| Melting point (in a sealed tube) | 348 °C |
| Density @ 20°C | 1540 kg/m3 |
| Enthalpy of formation (crystal) | -166.41 kcal/mol |
| Absolute entropy | 0.105641 kcal/mol/K |
| Combustion heat | - 765.4 kcal/mol |
| Sublimation heat | 25.5 kcal/mol |
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