能升华，可溶于醇，能溶于醚、碱、热水，不溶于冷水。用于染料；香料；医药；塑料；荧光增白剂制造。 application： Terephthalaldehyde is used as an intermediate for the preparation of dyes and fluorescent whitening agents. It is used in the synthesis of polyimines by reacting with aliphatic diamines. It is used as a precursor for the preparation of paramagnetic microporous polymeric organic frameworks (POFs) through copolymerization with pyrrole, indole, and carbazole.