- osmium tetroxide
- osmium tetroxide n a crystalline compound OsO4 that is an oxide of osmium, has a poisonous irritating vapor, and is used chiefly as a catalyst, as an oxidizing and hydroxylating agent (as in the conversion of alkenes to glycols), and as a biological fixative and stain (as for fatty substances in cytology) called also osmic acid
* * *a colourless or faintly yellowish compound used to stain fats or as a fixative in the preparation of tissues for microscopical study. Osmium tetroxide evaporates readily, the vapour having a toxic action on the eyes, skin, and respiratory tract.
* * *OsO4, a colorless or light yellow crystalline compound with a pungent odor, used as a fixative in preparing histologic specimens; if splashed in the eyes it can cause conjunctivitis, corneal damage, and in severe cases blindness. Called also osmic acid.
Medical dictionary. 2011.
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Osmium tetroxide — Osmium tetroxide … Wikipedia
osmium tetroxide — noun Etymology: International Scientific Vocabulary osmium + tetroxide : a crystalline compound OsO4 that has a poisonous irritating pungent vapor, that is usually made by oxidizing osmium, and that is used chiefly as a catalyst, as an oxidizing… … Useful english dictionary
osmium tetroxide — (= OsO4) Used as a post fixative/stain in electron microscopy. Membranes in particular are osmiophilic, ie. bind osmium tetroxide … Dictionary of molecular biology
osmium tetroxide — osmic acid a colourless or faintly yellowish compound used to stain fats or as a fixative in the preparation of tissues for microscopical study. Osmium tetroxide evaporates readily, the vapour having a toxic action on the eyes, skin, and… … The new mediacal dictionary
osmium tetroxide — noun Date: 1869 a crystalline compound OsO4 that is an oxide of osmium, has a poisonous irritating vapor, and is used as a catalyst, oxidizing agent, and biological fixative and stain … New Collegiate Dictionary
osmium tetroxide — noun 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 … Wiktionary
osmium tetroxide — Chem. a crystalline or amorphous, colorless, poisonous compound, OsO4, soluble in water, alcohol, and ether: used for microscopic staining, in photography, and as a catalyst in organic synthesis. Also called osmic acid. [1875 80] * * * … Universalium
Осмия Тетраоксид (Osmium Tetroxide), Кислота Осмиевая (Osmic Acid) — бесцветное или желтоватое соединение, применяющееся для окрашивания жиров или в качестве фиксирующего вещества в процессе подготовки тканей для микроскопического изучения. Тетраоксид осмия является летучим веществом; его пары оказывают… … Медицинские термины
Osmium dioxide — IUPAC name Osmium dioxide … Wikipedia
Osmium(IV) chloride — IUPAC name Osmium(IV) chloride … Wikipedia