Terephthaloyl dichloride(CAS: 100-20-9)

Terephthaloyl dichloride (CAS: 100-20-9) is a white crystalline solid with a molecular weight of approximately 146.03 g/mol. It is highly soluble in organic solvents such as dichloromethane, chloroform, and acetic acid. Chemically, it is highly reactive and prone to hydrolysis under basic conditions. It can also undergo esterification and polymerization reactions.

Terephthaloyl dichloride is typically synthesized from terephthalic acid by chlorination under acidic conditions. The reaction involves the chlorination of terephthalic acid, followed by distillation to purify the product. Common catalysts include thionyl chloride, which provides high selectivity and yield.

Terephthaloyl dichloride (CAS: 100-20-9) is primarily used in the production of polyethylene terephthalate (PET) for packaging materials, fibers, and films. It is also utilized in the synthesis of liquid crystals, thermosets, and epoxy resins for electronics and semiconductors.

When handling terephthaloyl dichloride (CAS: 100-20-9), ensure proper personal protective equipment (PPE) including gloves, safety goggles, and a lab coat. Work should be conducted in a fume hood due to its volatility and reactivity. Spills should be cleaned up with care, using appropriate absorbents. Refer to the Safety Data Sheet (SDS) for detailed procedures and emergency response information.