Glycerin use at wbgeneral

Mahnaz Mansourpour mahnaz at stanford.edu
Mon Dec 5 09:32:49 PST 2011


Hi Scott,
take care of your knee.:-(
Please ask Chen Chen to come and see me, I need to talk to uli and see 
when is a good time and discuss it with Chen so
we can go forward with the experiment.

mahnaz


On 12/5/2011 8:30 AM, Scott Lee wrote:
> Hi Mahnaz and SpecMat,
>
> In August, my request to use a glycerin/boe solution at wbgeneral was 
> approved under the following conditions: (1) reserve and enable both 
> sides of wbgeneral so that no one else is in close proximity, (2) use 
> small amounts, and (3) collect the waste. I received permission to use 
> it but I wanted to get permission for another member of my group (Chen 
> Chen) to use it.
>
> I would like to do one more glycerin/boe run before the shutdown. As 
> most of you know, I had knee surgery last Friday (which went well, but 
> I doubt I will be back in the fab this week). I would like to have 
> Chen Chen use the BOE/glycerin solution (he is experienced with my 
> release process using plain HF) under J Provine's supervision to 
> ensure the protocol above is being met. Chen may also need to do 
> glycerin/boe mixes for his own processing.
>
> Please let me know soon if this plan would be okay. Your prompt reply 
> would be greatly appreciated.
>
> Thanks,
> Scott
>
> On Tue, Aug 2, 2011 at 3:22 PM, Mahnaz Mansourpour 
> <mahnaz at stanford.edu <mailto:mahnaz at stanford.edu>> wrote:
>
>     Hi Scott,
>
>     Your request has been approved, with the following:
>
>     To bring your chemical in the lab, First make sure to obtain a
>     yellow label and log the chemical on the logsheet in my office.
>
>     Secondly:
>     Place your chemical in the top shelf (for personal chemicals) in
>     the chemicals pass-through, from the hall way  (ask a Staff member
>     to open it).
>     You can access the chemical from inside the lab when you go inside.
>
>     As you mentioned, there were only be small amount of the chemical
>     at the time of processing.
>     The mixture to be used at room temperature.
>     The waste should be collected and labeled with all the appropriate
>     information.
>     As Uli has suggested,   the bench ( wbgeneral)  be reserved on
>     both side when you are working.
>
>     Let me know if you have any questions.
>
>     mahnaz
>
>
>
>
>
>
>     On 8/2/2011 11:13 AM, Scott Lee wrote:
>>     Hi all,
>>
>>     I talked to Mahnaz who wanted more process specifics and details
>>     about glycerin.  I will be etching pieces at wbgeneral.  As
>>     stated earlier, I will use a 5:3 BOE:glycerin mixture.  Since I
>>     will be working with pieces, the quantity of the solution will be
>>     small (~500mL every 2 weeks).  The mixture will be used at room
>>     temperature.  Teflon and plastic beakers will be used.  The waste
>>     will be specially collected as per hazardous waste protocol and
>>     not be drained down the HF drain.
>>
>>     The MSDS (link attached below) says that it may explode on
>>     contact with chromium trioxide, potassium chlorate, and potassium
>>     permanganate.  It also says to avoid contact with sulfuric and
>>     nitric acids (leads to explosive glyceryl nitrate).  Uli
>>     recommended reserving and enabling both sides of wbgeneral.  The
>>     recommendation seems good to me to ensure that no one is using
>>     sulfuric acid or nitric acid in the near vicinity.  Other than
>>     that, it's boiling point is 290C and flashpoint is 177C.
>>
>>     According to wikipedia, glycerin is found in a wide variety of
>>     products including diet foods, laxatives, and cough syrup.
>>
>>     Let me know if any other information would be of interest.
>>
>>     Cheers,
>>     Scott
>>
>>     MSDS
>>     http://www.sciencelab.com/msds.php?msdsId=9927350
>>
>>     Wikipedia
>>     http://en.wikipedia.org/wiki/Glycerin
>>
>>
>>
>>
>>
>>     On Tue, Aug 2, 2011 at 8:17 AM, Scott Lee <wslee at stanford.edu
>>     <mailto:wslee at stanford.edu>> wrote:
>>
>>         Hi specmat,
>>
>>         Any response on my proposal to use glycerin at wbgeneral?  I
>>         talked to Uli and it seems like the main concern is whether I
>>         can dispose of the glycerin/BOE solution in the HF drain or
>>         if it needs to be disposed of in the hazardous waste in the
>>         acid storage cabinet.  Feedback would be greatly appreciated.
>>
>>         Thanks,
>>         Scott
>>
>>
>>         On Tue, Jul 26, 2011 at 12:03 PM, Scott Lee
>>         <wslee at stanford.edu <mailto:wslee at stanford.edu>> wrote:
>>
>>             Hi all,
>>
>>             I wasn't sure who to send this to so I decided to send it
>>             to the safety and specmat mailing lists.
>>
>>             I am working with a collaborator in Illinois on hafnium
>>             diboride (HfB2) as a hard, conductive material.  I need
>>             to selectively etch SiO2 without etching the HfB2.  My
>>             collaborator says his group has had success using a 5:3
>>             BOE:glycerin solution where the BOE is 7:1 40%NH4F:49% HF.
>>
>>             I would like to use this solution at wbgeneral since I
>>             will be working with HF and I need to go to CPD
>>             afterwards.  Since glycerin is an alcohol (which is not
>>             normally permitted at wbgeneral), I wanted to make sure
>>             it is okay to use.  Let me know if you have any concerns.
>>              I attached the link to the MSDS sheet below.
>>
>>             Thanks,
>>             Scott
>>
>>             http://www.sciencelab.com/msds.php?msdsId=9927350
>>
>>
>>
>
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