On October 31, Tangshan Huayi Industrial Co., Ltd.'s quote for maleic anhydride is priced at RMB 6,300 per ton. The specifications of maleic anhydride are as follows: grade: premium quality; content of maleic anhydride: ≥99.5%; process: benzene oxidation method. The validity period of this quote is three days. The provider of this quote is Jinan Aocheng Chemical Co., Ltd.