April 21 (Reuters) - On April 21, the ex-factory price of acetic anhydride at Shandong Yankuang was reported at 5,850 yuan per ton, a decrease of 150 yuan per ton. Actual transactions are primarily subject to negotiation, with its 100,000-ton-per-year facility operating stably. Chempricehub analysis of acetic anhydride, with a bullish-bearish score of -1.5: The ex-factory price of acetic anhydride has dropped by 150 yuan per ton, indicating ample market supply or weak demand. The stable operation of the facility reinforces supply expectations, leading to downward pressure on spot prices. This reflects the current loose supply-demand balance in the market, which may further suppress short-term price rebounds.