Date: Wed, 30 Sep 2009 18:16:08 -0400
Reply-To: List Moderator <ecgrants**At_Symbol_Here**UVM.EDU>
Sender: DCHAS-L Discussion List <DCHAS-L**At_Symbol_Here**LIST.UVM.EDU>
From: List Moderator <ecgrants**At_Symbol_Here**UVM.EDU>
Subject: Follow up question Re: Lab fire at CU-Boulder chemistry building

From: Saldivar, Jay <SaldivarJ**At_Symbol_Here**sharpsec.com>
Subject: RE: [DCHAS-L] Lab fire at CU-Boulder chemistry building doused by sprinklers
Date: September 30, 2009 5:54:25 PM EDT

> Lab fire at CU-Boulder chemistry building doused by sprinklers

This timely post urges me to ask a few questions regarding overnight experiments.
One of our scientists has submitted a process request to utilize a 500 ml volume of H2O2:HF (10%):CH3OH in a ratio of 3:1:2, under bias, for a duration of 24-48 hrs. This solution will be used to =91electrochemically-etch=92 a solid material in contact with a 1 amp/ 100 V maximum power supply in an exhausted enclosure. The submersed solid is used as the anode and a platinum wire facing will be used as the cathode.
My questions:
  • Has anyone out there performed similar experiments where power is applied over a lengthy duration?
  • At what power level should we be concerned (electrical, fire, etc.)?
  • Should this type of experiment be allowed to occur unattended over a 16 hr period?
  • Are there any other concerns not addressed in the previous 3 bullets? (I understand the hazards of HF as well as those of combining an oxidizer with a solvent)
I appreciate any and all responses.
Thank you,
I.J. Saldivar
Sr. Safety Administrator
Sharp Microelectronics of the Americas
5700 NW Pacific Rim Blvd
CamasWA  98607
 
(o) 360/834-8734
(c) 360/772-4502
 

Previous post   |  Top of Page   |   Next post



The content of this page reflects the personal opinion(s) of the author(s) only, not the American Chemical Society, ILPI, Safety Emporium, or any other party. Use of any information on this page is at the reader's own risk. Unauthorized reproduction of these materials is prohibited. Send questions/comments about the archive to secretary@dchas.org.
The maintenance and hosting of the DCHAS-L archive is provided through the generous support of Safety Emporium.