A: We offer absolutely free inventory samples below 1KG, if you need Particular samples, make sure you Get in touch with us and we could communicate. Poly Aluminium Chloride achieves this by building hydroxyl ions and polyvalent anionic polymers, which facilitate the coagulation and flocculation of suspended particles to enhance https://www.pac-pfs.com/product/drinking-grade-polyaluminium-chloride.html