Polyaluminium Chloride (PAC) powder typically comes in several colors, which can range from  light yellow to dark brown or even white color, grey. The color variation is primarily due to differences in the manufacturing process and the degree of polymerization, as well as the content of impurities or unreacted components.

The color of PAC does not necessarily correlate directly with its effectiveness but can serve as an indicator of its chemical composition and potential application areas. In practice, the choice between different colored PAC powders depends on factors including the specific water treatment requirements, the pH of the water being treated, and the targeted contaminant removal efficiency.

In summary, while color itself doesn't dictate the exact usage scenario, it can give insights into the expected performance characteristics of the PAC. Users should consider additional parameters like the product's Al content, pH value, and solubility, along with testing under actual operating conditions, to determine the most appropriate type of PAC for their needs.

Keywords: PAC, Poly aluminum Chloride, poly aluminium chloride, Polyaluminum Chloride, PACL, Coagulant

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