COLLOIDAL SILVER PLUS DROPS Description CE medical device no. 718, antibacterial, with practical dropper cap for direct application. Also indicated for the treatment of the ear canal. Colloidal Silver Plus maintains the stability of its parts per million for over two years, in addition to the packaging, for the use of the Z potential (67mv) and traces of metals (gold and platinum) which allow the highest synergy of the product without any precipitation. pH 6.7 (±0.5). It is composed of