CAS： 100-21-0
MF： C8H6O4
Appearance： white powder
Terephthalic acid (TPA) is a white crystalline or powdery dicarboxylic acid with a molecular weight of 166.13 g/mol, a density of 1.522 g/cm³, and a sublimation point of 402°C in air. Slightly soluble in water (17–19 mg/L at 25°C), it has a vapor pressure of less than 0.01 hPa at 20°C and is primarily produced through the oxidation of p-xylene using cobalt or manganese acetate catalysts. TPA serves as a key building block for polyethylene terephthalate (PET) via polycondensation with ethylene glycol, enabling applications in plastic bottles, food packaging, and polyester fibers. While stable under normal conditions, TPA requires careful handling due to potential hazards, including skin and eye irritation. It must be stored in a dry, ventilated area and handled with protective gear to minimize risks. Its high melting point and low water solubility make it essential for creating strong, durable, and water-resistant polymer materials.
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