The domestic price for sodium metasulfite on October 31st was 2900 RMB/ton. The specifications of sodium metasulfite are: Usage grade: industrial grade; main content (calculated by Na2S2O5), ω/%, ≥: 96.5. The validity period of the quoted price is 7 days. The provider of the quoted price is Henan Qingmai Environmental Protection Technology Co., Ltd.