On October 4, the domestic price for activated carbon is 7500 RMB/ton. The specifications of activated carbon include a pH value between 5 and 7.5, a ash content between 8 and 10%, moisture less than or equal to 3%, bulk density between 400 and 500, specific surface area greater than 900 M2/g, iodine absorption value greater than 800, and particle size of 250 mesh. The validity period of this quotation is 7 days. The quoting entity is Henan Kaijie Water Treatment Co., Ltd.