From: Richard Palluzi <000006c59248530b-dmarc-request**At_Symbol_Here**LISTS.PRINCETON.EDU>
Subject: Re: [DCHAS-L] Repurpose Perchloric Acid Hood
Date: Wed, 10 Feb 2021 12:32:38 -0500
Reply-To: ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**Princeton.EDU>
Message-ID: 008501d6ffd2$ba3b45b0$2eb1d110$**At_Symbol_Here**verizon.net
In-Reply-To


NFPA 45 states that

 

7.12.1.2* Perchloric acid shall be permitted to be used in a

chemical fume hood that is not specifically designed for

perchloric acid operations where the vapors are trapped and

scrubbed before they are released into the hood.

 

So if you have no perchloric acid it devolves into a standard hood. And he rest of section 7.12 does not remove any of the standard hood elements. So, as long as it has been properly decontaminated, yes.

 

Richard Palluzi

PE, CSP

 

Pilot plant and laboratory consulting, safety, design, reviews, and training

www.linkedin.com/in/richardppalluzillc/

 

Richard P Palluzi LLC

72 Summit Drive

Basking Ridge, NJ 07920

rpalluzi**At_Symbol_Here**verizon.net

908-285-3782

 

From: ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**Princeton.EDU> On Behalf Of Stephen Beaton
Sent: Wednesday, February 10, 2021 12:01 PM
To: DCHAS-L**At_Symbol_Here**Princeton.EDU
Subject: [DCHAS-L] Repurpose Perchloric Acid Hood

 

Hello all, 

 

Can a perchloric acid hood be repurposed as a standard fume hood for typical chemistry reactions? Are there any limitations?

 

There are some older perchloric acid hoods, but the wash down cycle is no longer functional (perchlorates have been addressed). There is no anticipated work with perchloric acid. The exhaust fan is still operational, and can draw an appropriate face velocity.

 

Thoughts?

Thank you.

 

Stephen Beaton, MSc, CHO, CRSP
Chemical Safety Manager

Environmental Health and Safety Office
902.494.1934 | steve.beaton**At_Symbol_Here**dal.ca
Dalhousie University

dal.ca/safety

 

 

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