ʻO 1.Phthalic anhydride kekahi o nā mea koʻikoʻi koʻikoʻi kemika, ʻo kāna mau derivatives nui he dibutyl phthalate, dioctyl ester a me diisobutyl ester, a hiki ke hoʻohana ʻia e like me ka plasticizer no PVC, etc.
2. Hiki ke hoʻohana ʻia i ka hana ʻana i ka resin polyester unsaturated, alkyd resin, dyes a me nā puaʻa, nā ʻano pena, nā meaʻai meaʻai, etc.