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<span style="font-size:14px;"><strong><span style="color: rgb(43, 43, 43); font-family: interface, Helvetica, Arial, sans-serif;">Mercury(II) oxide is used in marine and porcelain paints, dry batteries, chemical reagents, and topical antiseptics. It acts as a significant part in the production of mercury. It is utilitarian in the deduction of a mercury based superconductor. It is likewise employed, as a photo-oxidant for the photochemical oxidation of primary aromatic amines to the corresponding azoaromatic compounds. It is also an essential material for the preparation of cathodes in mercury batteries.</span></strong></span></p>