The quoted price for activated carbon on November 21st is RMB 5,500/ton. The specifications of the activated carbon are as follows: pH value between 5 and 7.5, ash content between 8 and 10%, moisture ≤ 3%, bulk density between 400 and 500, specific surface area > 900 m²/g, iodine absorption value > 800, particle size 250 mesh. The validity period of this quote is three days. The provider of the quoted information is Henan Shunzhibang Environmental Protection Technology Co., Ltd.