DCHAS-L Discussion List Archive
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Subject: Re: Piranha solution
Date: Tue, 17 May 2011 19:24:13 -0400
Author: "Bell,Martin"
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Subject: Re: Piranha solution
Date: Wed, 18 May 2011 05:38:49 -0700
Author: David Bunzow
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Date: Tue, 17 May 2011 22:00:29 -0400
Reply-To: DCHAS-L Discussion List <DCHAS-L**At_Symbol_Here**LIST.UVM.EDU>
Sender: DCHAS-L Discussion List <DCHAS-L**At_Symbol_Here**LIST.UVM.EDU>
From: ILPI <info**At_Symbol_Here**ILPI.COM>
Subject: Re: Piranha solution
In-Reply-To: <5B0B5ACDD36F9340940DAC5575821D870112D364**At_Symbol_Here**ENTWEXMB0000002.university.harvard.edu>
I've said it before on
this list, so I will simply reference the previous discussion(s) and say
here that Piranha solution is exceedingly dangerous and, in all but
carefully controlled and highly limited circumstances, poses an
unacceptable risk in synthetic research labs. The near miss you
describe and the apparently limited knowledge of those who were using it
serves to reinforce my argument.
Rob
Toreki
=======================================================
Safety Emporium - Lab & Safety Supplies featuring brand
names
On May 17, 2011, at 4:20 PM, Johnson, Amy Carr
wrote:
I have been reading about how
to make Piranha solution and I keep coming across this statement,
=93Add the acid to the peroxide, although some authorities
disagree=94 Why would authorities not agree that adding acid
to water instead of water to acid is best?
I have seen some say add acid to
peroxide for initial solution, but when refreshing, add
aliquots of hydrogen peroxide to Piranha mixture. Is that
ok?
We recently had an
incident when Piranha came in contact with ferric chloride and instantly
reacted
violently Was this due to the metal,
the fact that both are oxidizers, both, or something
else?
I have read that
neoprene gloves should always be worn. True?
What type of glass is appropriate
for containment?
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