[3dem] Ethane Cylinder Age

[Zongli Li]

Hi Len,

We used the ethane cylinder older than 9 years and didn't notice an
obvious problem.

Best,

Zongli



On Tue, Sep 9, 2025 at 11:56 AM Thomas, Leonard M. via 3dem <
3dem at ncmir.ucsd.edu> wrote:

> Hello All,
>
> Sort of oddish question but how long is a research grade Ethane cylinder
> good for?  We have one that is probably at least 6 years old and I was
> wondering when I should worry about the quality of the ethane for plunge
> freezing.  It really was not used much when it was first purchased but has
> been since we got a hold of it.
>
> Thank in advance for any thoughts,
> Len
>
> Leonard M. Thomas, Ph.D.
>
> Biomolecular Structure Core Director
>
> Oklahoma COBRE in Structure Biology
>
> Department of Chemistry and Biochemistry
>
> Stephenson Life Science Research Center
>
> 101 Stephenson Parkway
>
> Norman, OK 73019
>
> (405)325-1126
>
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