On January 5th, the acetic anhydride market showed a strong upward trend. The mainstream ex-factory price of acetic anhydride in the Shandong region was reported at 4,050-4,150 yuan/ton, an increase of 50 yuan/ton, with actual transactions subject to negotiation. PriceSeek analysis of acetic anhydride, long-short score: 1. The spot price of acetic anhydride increased by 50 yuan/ton, with the mainstream ex-factory price in the Shandong region reported at 4,050-4,150 yuan/ton, indicating a tight supply-demand balance in the market and improved demand, which is favorable for spot prices. In the short term, the strong upward trend in prices may continue, supporting market confidence.