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Chemistry Forums for Students => Organic Chemistry Forum => Organic Chemistry Forum for Graduate Students and Professionals => Topic started by: Babcock_Hall on March 30, 2021, 02:24:23 PM

Title: storing a hexanes solution of Dibal-H at various temperatures
Post by: Babcock_Hall on March 30, 2021, 02:24:23 PM

We just used this today using dry syringe technique and nitrogen.  Ever the optimists, we would like to store it for future use.  We plan to put it into a small desiccator.  Is there any advantage in storing at 4° C?  Is -20 °C better?

Title: Re: storing a hexanes solution of Dibal-H at various temperatures
Post by: rolnor on March 30, 2021, 03:41:20 PM

I think I used it as a DCM-solution, this was an old bottle but worked fine so maybe its not so critical. It was stored in freezer.
Does it say anything on the bottle about storage temp?
What I see itshould be 2-8°C
https://www.sigmaaldrich.com/catalog/product/aldrich/214973?lang=en&region=SE

Title: Re: storing a hexanes solution of Dibal-H at various temperatures
Post by: phth on April 24, 2021, 05:03:22 PM

Get the canister version and it will remain good for several years if handled properly!!

https://www.sigmaaldrich.com/content/dam/sigma-aldrich/docs/Aldrich/Bulletin/al_techbull_al136.pdf

Title: Re: storing a hexanes solution of Dibal-H at various temperatures
Post by: OrganicDan96 on April 25, 2021, 12:35:58 PM

transfer it to a schlenk flask or youngs flask, much better for long-term storage of sensitive reagents. sure seal bottles have a limited number of punctures before they can no longer maintain a gas tight seal