HYDRARGYRI OXIDUM FLAVUM—YELLOW MERCURIC OXIDE
Origin.—Yellow mercuric oxide is obtained by the interaction of mercuric chloride and sodium hydroxide.
Properties.—Mercuric oxide is of a yellow color, similar to that of the yolk of egg, and is a completely amorphous powder; odorless, and having a somewhat metallic taste; permanent in the air, but turning dark on exposure to light; insoluble in water or alcohol.
Actions.—A stimulant caustic and anesthetic.
Uses.—The official ointment of yellow mercuric oxide is prescribed as a stimulant and anesthetic in chronic inflammation and ulceration of the eye (4 gr. of yellow mercuric oxide to 1 oz. of vaseline). It is also employed on skin diseases, indolent ulcers, swollen glands and granulated wounds.