On November 19, Dongying Kede's quote for maleic anhydride is 5150 yuan/ton. The specifications of maleic anhydride are as follows: Dongying Kede grade: premium; maleic anhydride content ≥ 99.5%. This quoted price is valid for 3 days. The provider of the quoted price is Shandong Yushuo Chemical Co., Ltd.