From: Dr Bob <drbob**At_Symbol_Here**FLOWSCIENCES.COM>
Subject: Re: [DCHAS-L] Perchloric acid spill neutralization and absorption
Date: Wed, 8 May 2019 17:29:51 +0000
Reply-To: ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**PRINCETON.EDU>
Message-ID: 0723ee39cb6945c982984bfac2e8e3c0**At_Symbol_Here**flowsciences.com
In-Reply-To


Hi Mel!

 

See attached links for a paper I wrote on the subject and videos.

 

https://www.flowsciences.com/perchloric-acid-fume-hoods/

 

https://dms.licdn.com/playback/C4E05AQFmvXUk3ukHrw/0475bb20fac94a6183e300ecf8e27d6a/feedshare-mp4_3300-captions-thumbnails/1507940147251-drlcss?e=1557424800&v=beta&t=9rVCqCuU3he50Ml_5ETMhahDPXBt4zzdXlnWK7ekU8o

 

A perchloric acid hood is a very special unit. I would never advise trying to handle this material without proper protection. I'll always be happy to talk with you!

 

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 Mel -SmithCharlton
Sent: Wednesday, May 8, 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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