In December, the market for polyaluminum chloride fluctuated and rose, with market prices rising from 1760 yuan/ton at the beginning of the month to 1777.50 yuan/ton at the end of the month, an increase of 0.99%, and a year-on-year decrease of 12.33% at the end of the month. In December, the market situation of ammonium chloride significantly declined, with market prices dropping from 727.50 yuan/ton at the beginning of the month to 662.50 yuan/ton at the end of the month, a decrease of 8.93%, and a year-on-year decrease of 42.14% at the end of the month. The downstream market situation has significantly declined, and downstream manufacturers have weakened their enthusiasm for purchasing hydrochloric acid.