On November 30th, Shandong Kailong Chemical Technology Development Co., Ltd.'s quotation for sodium dioxide (sodium metabisulfite) was set at 1800 yuan per ton. The specification of sodium dioxide includes: application grade: industrial level; main content (calculated based on Na2S2O5), ω/%, ≥: 96.5%. The validity period of this quotation is 3 days. Quotation provider: Jinri Heavy Industry and Chemical Co., Ltd.