Mercuric Oxide, Yellow
Title: Mercuric Oxide, Yellow
CAS Registry Number: 21908-53-2
Additional Names: Yellow precipitate
Molecular Formula: HgO
Molecular Weight: 216.59
Percent Composition: Hg 92.61%, O 7.39%
Literature References: Contains 99-99.5% HgO.
Properties: Yellow or orange-yellow, heavy, odorless powder, orthorhombic structure. Poisonous! Becomes red on heating and yellow again on cooling; more finely divided and more reactive than red mercuric oxide. Other physical properties and solubilities: see Mercuric Oxide, Red. Protect from light. Incompat: Reducing agents.
Use: Similar to that of the red oxide; in the mfr of organic mercurials. In anal. chemistry for determining Zn or HCN; detecting acetic acid in formic acid, CO in gas mixtures.
Therap-Cat: Topical antiseptic (ophthalmic).
Therap-Cat-Vet: Has been used as a topical antiseptic, fungicide, in chronic skin conditions, conjunctivitis, corneal ulcers.

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