Polyaluminium Chloride，簡稱 PAC。

Polyaluminium chloride is an inorganic polymer flocculant. It is mainly used in water treatment to remove suspended solids, colloidal substances and some dissolved pollutants.

聚合氯化鋁是一種無機高分子絮凝劑。它主要用于水處理中，以去除懸浮固體、膠體物質和一些溶解的污染物。