On May 19, the market price of food-grade sodium metabisulfite (96.5% purity) in Hunan was quoted at 4,200 RMB/ton, up 200 RMB/ton. The continuous price increase is driven by rising raw material costs and increasing demand. Chempricehub's assessment of sodium metabisulfite: bullish/bearish score — 120. As of May 19, 2026, the price of food-grade sodium metabisulfite (96.5% purity) in the Hunan market was quoted at 4,200 RMB/ton, a single-day increase of 200 RMB/ton. Supported by the dual positive factors of higher raw material costs and growing downstream demand, spot prices have shown a strong upward trend, providing favorable support for the market outlook.