On May 18, driven by increased market demand and rising raw material prices, the price of industrial-grade sodium metabisulfite (96.5% purity) in the Shanghai market was quoted at RMB 4,100/ton, up by RMB 200/ton, with inventory accounting for approximately 20% of capacity. According to Chempricehub's assessment of sodium metabisulfite, the bullish-bearish rating stands at 1 (bullish). Supported by dual favorable factors—rising market demand and higher raw material costs—the quoted price for industrial-grade 96.5% sodium metabisulfite in the Shanghai market on May 18 was raised by RMB 200/ton to RMB 4,100/ton. Current inventory levels are only around 20%, indicating limited supply pressure, which provides significant support to spot prices, with an overall bullish outlook.