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Subject: [DCHAS-L] Congratulations to Michael J. Wright, the 2019 William Steiger Memorial Award winner
Date: Wednesday, May 8, 2019 at 12:54:47 PM
Author: DCHAS Membership Chair <membership**At_Symbol_Here**DCHAS.ORG> 		Next by Date:
Subject: Re: [DCHAS-L] Perchloric acid spill neutralization and absorption
Date: Wed, 8 May 2019 17:23:56 +0000
Author: "Stuart, Ralph"

From: Mel -SmithCharlton <melissafcsmith**At_Symbol_Here**GMAIL.COM>
Subject: [DCHAS-L] Perchloric acid spill neutralization and absorption
Date: Wed, 8 May 2019 13:15:29 -0400
Reply-To: ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**PRINCETON.EDU>
Message-ID: CALn8UKAicQ0smVty=aB8p=fb+vtSapt0oNybQCg1+6r5x4ratA**At_Symbol_Here**mail.gmail.com



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
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