On January 30, the DBP market in Jiangsu region stabilized, with quotations at 8,000 yuan/ton. In Shandong region, the DBP market also stabilized, with quotations at 7,900 yuan/ton, while in Zhejiang region, the DBP market remained steady, with quotations at 8,100 yuan/ton. On January 30, the price of n-butanol, a raw material for plasticizer DBP, fluctuated and rose, while the phthalic anhydride market remained weak and consolidated. The price of isooctanol fluctuated and stabilized, leading to stable raw material costs for DBP. PVC prices fluctuated and consolidated, with weak downstream demand. DBP production equipment experienced a slight increase in operating rates, resulting in sufficient DBP supply. DBP factory inventories remained low, and downstream customers' purchasing enthusiasm was moderate. Transaction prices were based on negotiated agreements, ranging from 7,900 to 8,100 yuan/ton for DBP. DBP prices stabilized, with downward pressure still present but upward momentum weakening, leading to a temporarily stable DBP market.