An oxide of the metal osmium, OsO; it is very poisonous, has a pungent smell and can cause blindness; it is a powerful oxidizing agent, and is used to stain biological materials.
U.S. National Library of Medicine
(T-4)-Osmium oxide (OsO4). A highly toxic and volatile oxide of osmium used in industry as an oxidizing agent. It is also used as a histological fixative and stain and as a synovectomy agent in arthritic joints. Its vapor can cause eye, skin, and lung damage.
The numerical value of osmium tetroxide in Chaldean Numerology is: 8
The numerical value of osmium tetroxide in Pythagorean Numerology is: 3
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"osmium tetroxide." Definitions.net. STANDS4 LLC, 2018. Web. 23 Feb. 2018. <https://www.definitions.net/definition/osmium tetroxide>.