About This Archive  | DCHAS-L 2019 Index   | DCHAS-L Yearly Index
person wearing a disposable face shield and surgical style mask

Check out Safety Emporium for your N95, N99, and face shield needs.

Previous by Date:
Subject: Re: [DCHAS-L] Perchloric acid spill neutralization and absorption
Date: Wednesday, May 8, 2019 at 1:29:51 PM
Author: Dr Bob <drbob**At_Symbol_Here**FLOWSCIENCES.COM> 		Next by Date:
Subject: Re: [DCHAS-L] Perchloric acid spill neutralization and absorption
Date: Wed, 8 May 2019 17:52:47 +0000
Author: Debbie M. Decker

From: Michael T. Kleinman <mtkleinm**At_Symbol_Here**UCI.EDU>
Subject: Re: [DCHAS-L] Perchloric acid spill neutralization and absorption
Date: Wed, 8 May 2019 10:36:10 -0700
Reply-To: ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**PRINCETON.EDU>
Message-ID: CAP0Rp4VeOp_LxvgcQiKYGmpgxkJfKhOjXrLjnUO7FfR06UpiFg**At_Symbol_Here**mail.gmail.com
In-Reply-To


Using perchloric acid without the appropriate equipment is dangerous. The risk of course increases with the amounts and frequency of use. There are many other methods for hydrolysis of fish oils and fats that use less problematical reagents (e.g. sulfuric, hydrochloric and phosporic acids).

Michael Kleinman
Department of Medicine
Division of Occupational and Environmental Health
100 Theory STE 100
University of California, Irvine
Irvine, CA 92697-1830
949-824-4765


On Wed, May 8, 2019 at 10:22 AM Mel -SmithCharlton <melissafcsmith**At_Symbol_Here**gmail.com> wrote:

Greetings everyone,

we have a researcher who will be using 70%-72% Perchloric acid, he is making a 1:1 mix with Glacial Acetic Acid for the hydrolysis of fish fats. In either case, we have some concerns with this because we do not have a perchloric acid hood (separate issue). Now, once the mix is made, the Perchloric acid will be approximately 35% to 36%, however, my concern is with the possibility of a spill and the resulting waste from a spill. Neutralization first, yes, but then it is also recommended that the spill NOT be absorbed with any combustible such as paper towels etc. I have thought perhaps diatomaceous earth, or a combination of neutralizer with diatomaceous earth, collect with standard non-metal dust pan then bag/tag the neutralized waste.

Does anybody have any experience with Perchloric Acid spills, neutralization and absorbents, and if so, what do you use?

thanks!


Melissa Charlton-Smith
MS-OSH/EM, NRCC-CHO
GOMEB & Associates
VP Lab Safety, Chemical Hygiene & Lab Management
Consultant
304-563-6678
--- For more information about the DCHAS-L e-mail list, contact the Divisional membership chair at membership**At_Symbol_Here**dchas.org Follow us on Twitter **At_Symbol_Here**acsdchas
--- For more information about the DCHAS-L e-mail list, contact the Divisional membership chair at membership**At_Symbol_Here**dchas.org Follow us on Twitter **At_Symbol_Here**acsdchas

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.