Date: Mon, 14 Nov 2005 17:41:01 -0800
Reply-To: Gordon Miller <miller22**At_Symbol_Here**LLNL.GOV>
Sender: DCHAS-L Discussion List <DCHAS-L**At_Symbol_Here**LIST.UVM.EDU>
From: Gordon Miller <miller22**At_Symbol_Here**LLNL.GOV>
Subject: Questions About Perchloric Acid

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

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