Date: Tue, 15 Nov 2005 16:09:24 -0500
Reply-To: chemcon**At_Symbol_Here**JUNO.COM
Sender: DCHAS-L Discussion List <DCHAS-L**At_Symbol_Here**LIST.UVM.EDU>
From: Jay Young <chemcon**At_Symbol_Here**JUNO.COM>
Subject: Re: Questions About Perchloric Acid
Comments: To: miller22**At_Symbol_Here**LLNL.GOV
Mr. Miller,

Under no circumstances should perchloric acid be used in anything but a
hood designed and reserved for the purpose.  To answer your questions,
please refer to "Bretherick's Handbook of Reactive Chemical hHazards" the
current edition  (available in any good technical library) and look up
"perchloric acid".  You will become enlightened.

Jay Young

On Mon, 14 Nov 2005 17:41:01 -0800 Gordon Miller 
> I have one good question and two dumb ones. They are:
> What is a good chemistry and design for a scrubber to be used to 
> control emissions of perchloric acid from small scale heating 
> operations done in common hoods?
> Is there a quantity of perchloric acid that is so small that it can 
> be handled without benefit of a special hood, even if heated (Is 
> there a de minimis quantity)?
> What is the derivation of the NFPA 45 requirement that HClO4 not be 
> heated by flame or in an oil bath? I can guess, but I don't know.
> Please advise. "Inquiring minds want to know."
> Gordon Miller
> Lawrence Livermore National Laboratory
> P.O. Box 808  (L-379)
> Livermore, California 94550
> (925) 423-8036
> Fax (925) 422-5176
> miller22**At_Symbol_Here**

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