Glycerin use at wbgeneral

Scott Lee wslee at
Tue Aug 2 08:17:07 PDT 2011

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


On Tue, Jul 26, 2011 at 12:03 PM, Scott Lee <wslee at> 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
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