Bentonite wani nau'i ne na takin yumbu mai ɗauke da ruwa wanda akasari ya ƙunshi montmorillonite, saboda abubuwan da yake da shi na musamman.Kamar: kumburi, haɗin kai, adsorption, catalysis, thixotropy, dakatarwa, musayar cation, da dai sauransu.
PH darajar 8.9-10