How to distinguish between polyaluminum chloride and polyaluminum chloride 1, polyaluminium chloride is yellow in appearance, and polyaluminum chloride is red or brown. 2. From the perspective of industrial water treatment, polyaluminium chloride has an outstanding effect in river water purification. The treated water has outstanding effect and the water quality is relatively soft, which will not cause the fabric to be hard and so on. However, polyaluminum chloride In the process of purification of waste water such as steel mills, paper mills and waste water plants, the process is short, quick, and the treated water is clear and easier to meet the emission standards. 3, from the processing of raw materials point of view, polyaluminum chloride, in particular, the level of drinking water needs to use aluminum hydroxide powder material to process the production, and polyaluminum chloride need aluminum calcium powder as raw material for processing. 4, from the functional point of view PAC PAC can only be used in industrial water treatment, and PAC can be used for drinking water and industrial water treatment.