Osmium tetroxide 4% aqueous solution (DG)

Osmium Tetroxide, Crystalline, Highest Purity, 99.95% (Osmic Acid Anhydride). Osmium is a highly toxic, volatile solid, crystalised compound.  It is colourless but almost appears yellow. 

Applications: 
Many uses, most commonly a post-fixative in EM.   

OsO4   

F.W. 254.20   

CAS #20816-12-0 

Melting Range : 39.5-41.0°C 
Boiling Point : 129.7°C 
Vapor Pressure @25°C: 9.8 mmHg 
Solubility: 5.07% in Cold Water; 6.5% in Hot Water; 25.0% in CCl4 
Non-Volatile matter: <0.02% 

Small size (2ml), Light-gauge, pre-scored amber glass ampoules. Ampoules containing OsO4 Crystal, are pre-cleaned and heat sealed in plastic bags to assure a contaminant-free solution. Ampoules are also free of pressure-sensitive labels and, therefore, do not require cleaning prior to solution preparation. 

Aqueous Solutions are sealed under dry nitrogen with exact concentrations and volume in pre-scored amber-ampoules. 

Store at room temperature 

Store with milk powder - full-cream milk powder will inactivate osmium tetroxide's toxic vapours and is less messy than corn oil 

See All Osmium Tetroxide

Technical Data

Safety Data Sheet