From: Dr Bob <drbob**At_Symbol_Here**FLOWSCIENCES.COM>
Subject: Re: [DCHAS-L] Perchloric acid spill neutralization and absorption
Date: Thu, 9 May 2019 13:20:25 +0000
Reply-To: ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**PRINCETON.EDU>
Message-ID: c2445f8848a44e20844f38aaa3a1b7b1**At_Symbol_Here**flowsciences.com
In-Reply-To <1109037139E1524980CF9CBEB24766180118CD0963**At_Symbol_Here**UMF-EX10EMB1.umflint.edu>


All:

 

I am always impressed with research input on all problems discussed in this CHAS forum.

 

The perchloric acid fume hood is, relatively speaking, rarely ordered from manufacturers who make fume hoods. This infrequency leads me to believe that other chemical procedures are generally available to do the chemistry since the perchloric hood option requires so much extra effort to install correctly, use properly, and maintain professionally.

 

Please, PLEASE, review research application carefully and validate that published research completely documents the steps used in a perchloric process. Most manufacturers will wish to discuss thoroughly such applications with customers before proceeding to process an order.

 

If there are other alternate ways to achieve favorable outcomes. These should be pursued first.

 

Dr. Bob Haugen

Director of Product and Technology Development

Flow Sciences, Inc.

 

910 332 4878

 

Containment Products ¥ Get a Quote/Consultation ¥ Get Support/Replacement Parts

 

CONFIDENTIALITY NOTE: This e-mail, including all attachments, is directed in confidence solely to the person(s) to whom it is addressed, or an authorized recipient, and may not otherwise be distributed, copied or disclosed. The contents of this transmission may also be subject to intellectual property rights and all such rights are expressly claimed and are not waived. The contents of this e-mail do not necessarily represent the views or policies of Flow Sciences Inc. or its employees.

 

From: ACS Division of Chemical Health and Safety [mailto:DCHAS-L**At_Symbol_Here**PRINCETON.EDU] On Behalf Of Wilhelm, Monique
Sent: Thursday, May 9, 2019 8:40 AM
To: DCHAS-L**At_Symbol_Here**PRINCETON.EDU
Subject: Re: [DCHAS-L] Perchloric acid spill neutralization and absorption

 

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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