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**>
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

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