A: We provide absolutely free inventory samples lower than 1KG, if you want Specific samples, make sure you contact us and we could converse. Poly Aluminium Chloride achieves this by generating hydroxyl ions and polyvalent anionic polymers, which facilitate the coagulation and flocculation of suspended particles to enhance drinking water https://www.pac-pfs.com/product/drinking-grade-polyaluminium-chloride.html