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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