osmic acid

osmium tetroxide

noun Chemistry.
a crystalline or amorphous, colorless, poisonous compound, OsO 4 , soluble in water, alcohol, and ether: used for microscopic staining, in photography, and as a catalyst in organic synthesis.
Also called osmic acid.


Origin:
1875–80

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World English Dictionary
osmium tetroxide
 
n
a yellowish poisonous water-soluble crystalline substance with a penetrating odour, used as a reagent and catalyst in organic synthesis. Formula: OsO4

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Medical Dictionary

osmic acid os·mic acid (ŏz'mĭk)
n.
A crystalline oxide of osmium that is a volatile caustic and strong oxidizing agent, the aqueous solution of which is used as a stain for fat and myelin and as a general fixative for electron microscopy.

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