Chempricehub, June 5 - On June 5, some domestic butadiene companies conducted auctions and sales as follows: Dongming Petrochemical sold 280 tons externally with a floor price of RMB 11,500/ton; Satellite Chemical sold 420 tons externally with a starting bid of RMB 11,400/ton. The downstream synthetic rubber market weakened, and terminal procurement sentiment was subdued, dampening enthusiasm for raw material purchases, resulting in a generally bearish demand side. Although holders maintained a strong pricing stance, the persistent negative impact from the demand side led to a weak and fluctuating butadiene market today.