Osmium tetroxide, over 1g (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 deg C
Boiling Point : 129.7 deg C 
Vapor Pressure @25 deg 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 (2 ml), 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 

We ship osmium with full-cream milk powder, in case of breakage. Full-cream milk powder will inactivate osmium tetroxide's toxic vapours and is less messy than corn oil

See All Osmium Tetroxide

Technical Data

C010 and C012   Safety Data Sheet