On December 19, Tangshan Huayi Industrial Co., Ltd.'s quotation for maleic anhydride is 6300 yuan/ton. The specifications of maleic anhydride are: grade: premium; content of maleic anhydride: ≥99.5%; process: benzene oxidation method. The validity period of this quotation is three days. The quoting party is Jinan Aocheng Chemical Co., Ltd.