On October 21, Qi Xiang Tengda's quote for maleic anhydride was $54.50 per ton. Maleic anhydride specifications: Qi Xiang Tengda Grade: Premium quality; Maleic anhydride content ≥ 99.5%. The validity period of the quoted price is 3 days. Quotation provider: Shandong Jinsheng Run Chemical Co., Ltd.