May 20th News: On May 20, Yantai Wanhua held an auction for solid maleic anhydride: auction volume was 112 tons, with zero tons traded. Chempricehub comments on maleic anhydride, sentiment score: -1. Yantai Wanhua is a key domestic supplier of maleic anhydride. The failure to trade 112 tons of solid maleic anhydride in this auction reflects weak downstream demand and low acceptance of current prices among market participants. The negotiation focus in the spot market is likely to shift downward, exerting short-term pressure on maleic anhydride prices.