Mercury(II) Oxide Yellow is a highly insoluble thermally stable Mercury source .Yellow mercuric oxide shows antibacterial property and is commonly used in ophthalmic ointments.
Mercury(II) oxide, also called mercuric oxide or simply mercury oxide, has a formula of HgO.Mercury(II) oxide is a solid at room temperature and pressure. The mineral form montroydite is very rarely found. Mercuric oxide yellow form can be obtained by precipitation of aqueous Hg2+ with alkali.