From: "Wilhelm, Monique" <mwilhelm**At_Symbol_Here**UMFLINT.EDU>
Subject: Re: [DCHAS-L] Perchloric acid spill neutralization and absorption
Date: Thu, 9 May 2019 12:40:18 +0000
Reply-To: ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**PRINCETON.EDU>
Message-ID: 1109037139E1524980CF9CBEB24766180118CD0963**At_Symbol_Here**UMF-EX10EMB1.umflint.edu
In-Reply-To


I have an Analytical Chemist who also does fish oil research.  He has never used perchloric acid.  He has done some work with sulfuric acid hydrolysis, I believe.

 

If he will be heating this at all, a perchloric hood is a MUST.

 

Monique Wilhelm

Laboratory Manager

Department of Chemistry & Biochemistry

University of Michigan - Flint

 

From: ACS Division of Chemical Health and Safety [mailto:DCHAS-L**At_Symbol_Here**PRINCETON.EDU] On Behalf Of Mel -SmithCharlton
Sent: Wednesday, May 08, 2019 1:15 PM
To: DCHAS-L**At_Symbol_Here**PRINCETON.EDU
Subject: [DCHAS-L] Perchloric acid spill neutralization and absorption

 

 

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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