The Precipitated Silica used in toothpaste has Rub type, mix type and increase dense three kinds of products of types. Item: Precipitated Silica(Used in Toothpaste) The toothpaste of SIL500 use dioxide silicon to have no already set powder, tasteless, not is dissolve in the water or sour, become the chemistry sloth, with toothpaste in fluoride and other raw materialses dissolve mutually good, the ...