On September 24, Tangshan Huayi Industry Co., Ltd.'s 报价 for maleic anhydride is $6300 per ton. The specifications of maleic anhydride are as follows: grade: premium; content of maleic anhydride: ≥99.5%; process: benzene oxidation method. The validity period of this quotation is 3 days. The quoting entity is Jinan Aochun Chemical Co., Ltd.