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Author: Subject: Sodium Borohydride
weissmuller
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[*] posted on 24-12-2002 at 05:20
Sodium Borohydride


Hey everyone, I just found this board after a little searching and I must say its pretty decent.

Right now I am working on aquiring the chemicals for a procedure and having some trouble aquiring Sodium Borohydride.

The necessary quanity is only a matter of grams and most chemical suppliers seem to want to deal in larger amounts. Also with a hazmat label, aquiring could be slighly difficuilt and maybe expensive.

I have been trying to find a commercial product that contains some amount of it, but most are only trace amounts and would add to many other problems.

Does anyone have any advice on possible sources of this chemical. If contained with other water soluable reactants I might be able to work around it. Any help or insight would be appericated.
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[*] posted on 24-12-2002 at 16:45
you're in luck


Visit http://www.postapplescientific.com - they appear to deal with individuals and sell sodium borohydride in 5 g and 10 g units.
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weissmuller
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[*] posted on 24-12-2002 at 18:10
Thaks


Thanks a lot. That site looks like it'll work out. :)
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ChemGrl5
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[*] posted on 25-10-2005 at 20:38


it does'nt look like the above site sells sodium borohydride any more, what other ways are there to procure or synthisize it?;)



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BromicAcid
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[*] posted on 25-10-2005 at 20:54


This has been discussed somewhat and some pathways to make it from somewhat OTC chemicals have been pondered however I don't think anyone has actually made it from the methods discussed yet, you can see the relevent threads below:
Borohydride synth?
(Liquid) boron hydrides synthesis?
Check out both of those threads to get up to date on what we know or think we know about making boron hydrides. It's a shame that postapple doesn't carry borohydride any more... :(




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The_Davster
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[*] posted on 25-10-2005 at 21:05


Although they now ship to Canada, I remember that they did not a while back. Yay:)

Postapple does not have it listed, but they will give you a quote on whatever you need.

[Edited on 26-10-2005 by rogue chemist]




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Cloner
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[*] posted on 26-10-2005 at 05:01


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epck
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[*] posted on 26-10-2005 at 11:46


They still carry sodium borohydride.
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ChemGrl5
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[*] posted on 26-10-2005 at 16:55


Ooops don't know how I missed that. Thanks epck and everyone. However, I would still like to know if anyone has been successful in synthesizing this reagent in the home lab, and what steps were taken to produce it. :P



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[*] posted on 28-10-2005 at 02:29


I don't have it at hand, but all this talk about hydrogen economy should have yielded something useful by now: hydrogen storage in metal hydrides. Not sodium borohydride as such but probably aluminiumhydrides and the like. These things take up hydrogen under pressure.

from:
http://folk.uio.no/ponniahv/activity/hydride/hyd_tutorial.ht...

The reaction of hydrogen with a metal can be written as a chemical reaction:

M + x/2 H2 <----> MHx + Heat

The double-headed arrow indicates that the reaction is reversible and exists as an equilibrium state. In other words, by changing conditions, the reaction can be made to go in either the forward or reverse direction. The heat on the right-hand side indicates that heat or energy is released when the metal hydride is formed, and thus, heat must be put in to release hydrogen from the metal hydride phase. The heat is the enthalpy (heat of formation) of the reaction and is an indication of the strength of the metal-hydrogen bond in the metal hydride phase.
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[*] posted on 7-11-2005 at 22:09


www.sciencelab.com



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