leaf12 (Stranger)
02-24-04 09:27
No 490759
      Drying NaCNBH3     

I've obtained a small bottle of NaCNBH3, but it's quite wet. What would be the best way to remove this?
Which dessicant should I use? CaCl2 doesn't work (after two days in a vacc excicattor it didn't seemed any more dry) and H2SO4 is probably to risky (HCN)..
 
 
 
 
    foxy2
(Fragile ego)
02-24-04 22:32
No 490860
      Putting it over some P2O5 should work.     

Putting it over some P2O5 should work.
 
 
 
 
    fanofshulgin
(Hive Bee)
02-25-04 05:16
No 490931
      From NaCNBH3 MSDS     

This is taken from the MSDS of sodium cyanoborohydride.

10. Stability and Reactivity
Stability:
Water reactive. Very hygroscopic. May decompose on exposure to moist air or water.
Hazardous Decomposition Products:
Thermal combustion or decompositon may produce hydrogen cyanide, borane, oxides of carbon, nitrogen and boron; liberating flammable/explosive hydrogen gas.
Hazardous Polymerization:
Will not occur.
Incompatibilities:
Strong oxidizers, water, acids.
Conditions to Avoid:
Heat, flame, ignition sources, water, moist air, and incompatibles.



I would therefore suggest that your cyanoborohydride may well be dead.  Be very careful about wasting any valuable material with it.  Best to try and obtain a new sealed bottle before you experiment!

Fan of Shulgin


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