On October 30, Shandong Kailong Chemical Technology Development Co., Ltd.'s quotation for sodium metasodate is 1600 yuan per ton. The specifications of sodium metasodate include: Usage grade: Industrial grade; main content (calculated as Na2S2O5), ω/%, ≥: 96.5. The validity period of this quotation is 3 days. The quoting party is Jinan Jinrihed Chemical Co., Ltd.