... special water treatment Purity 29%,30%,31% Features Specifications: Poly Aluminium Chloride (PAC)Commodity: Poly Aluminium Chloride (PAC)Chemical Formula: [AL2(OH)LnCL6-n]mAppearance: Yellow ... , such as Tap water, Industrial Process Water, Daily sewage, etc. Poly Aluminium Chloride (PAC)granular