On January 6, the DBP market in Jiangsu region showed an upward trend, with a quoted price of 6,850 yuan/ton. In Shandong region, the DBP market also rose, with a quoted price of 6,750 yuan/ton, while in Zhejiang region, the DBP market increased, with a quoted price of 6,950 yuan/ton. On the same day, the price of n-butanol, a raw material for the plasticizer DBP, experienced a fluctuating rise, and the price of phthalic anhydride also increased. The price of isooctanol remained stable with a strong trend. The cost of DBP raw materials rose, while PVC prices fluctuated and consolidated. Downstream demand remained sluggish, leading to a slight decrease in the operating rates of DBP production equipment. Despite sufficient DBP supply, factory inventories were low. Downstream customers showed moderate purchasing enthusiasm, and transaction prices were determined through negotiation. The DBP price ranged from 6,750 to 6,950 yuan/ton, showing a strong upward trend. The downward pressure on DBP prices weakened, while the upward momentum strengthened, resulting in a robust increase in the DBP market.