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 四氧化锇

Osmium Tetroxide  四氧化锇
 
O, T (highly) - (4% aquoeus)
O, T (highly) - (crystal)
OsO4; [20816-12-0]; FW 254.20
Solid vaporizes by sublimination. Should be used only under the hood. Affects eyes,EM Grade, glass ampules in black paper. No sticky labels. Osmium purity >99.95%. Light sensitive.
Special note on handling Osmium Tetroxide (reference 5, appendices A:2.5, "Books" , Procedures in Electron Microscopy)
"Great care must be taken with osmium tetroxide....The crystals melt at 40°C and are extremely slow to dissolve in water. Both the crystals and diluted aqueous solutions give off fumes of osmium tetroxide, even at 0°C. It has an extremely low TLV (0.0002ppm). Osmium fixatives must therefore always be handled in a fume hood (cupboard), and because they act so rapidly, skin contact must be avoided at all times."
TLV= Eight hour average Threshold Limit Value measured in milligrams per cubic meter of air.
prod
Description
Unit
              price
18450
Osmium Tetroxide, 1/4 gram crystal, pkg/10
each
P.O.R.
18451
Osmium Tetroxide, 1/2 gram crystal
each
P.O.R.
18456
Osmium Tetroxide, 1 gram crystal
each
P.O.R.
18459
Osmium Tetroxide, 4% aqueous, 10 x 2ml
each
P.O.R.
18463
Osmium Tetroxide, 4% aqueous, 10 x 5ml
each
P.O.R.
18465
Osmium Tetroxide, 4% aqueous, 10 x 10ml
each
P.O.R.
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