Hi James,
Yeah, I did some 'hunting' for info on HP and there are several 'grades'
according to use, eg; 3% etc as sold OTC for wounds etc, then there is
'technical' which is used for circuit boards and electronics etc, then there
is 35% 'Food Grade' which is used to spray insides of milk cartons and on
fruit etc etc, then you come to the 'Reagent' grades which are the higher
percentages used for.......well used for things I have no interest in
anyway.
Terminologies may not be exact in the above, and may not be in the correct
order but you get my drift.
Cheers...Neville.
----- Original Message -----
From: "James McCourt, Ph.D." <[email protected]>
To: <[email protected]>
Sent: Saturday, September 27, 2008 4:12 AM
Subject: Re: CS>Concensus of opinion
My best recall is that Reagent grade is 35% concentration, and was the
most
pure for use in chemical lab work. Concentration levels over 35% were
considered unstable but had some uses such as missile power generators and
rocket fuel oxidizer.
----- Original Message -----
From: "Neville" <[email protected]>
To: <[email protected]>
Sent: Thursday, September 25, 2008 5:37 PM
Subject: Re: CS>Concensus of opinion
----- Original Message -----
From: "James McCourt, Ph.D." <[email protected]>
To: <[email protected]>
Sent: Friday, September 26, 2008 9:26 AM
Subject: Re: CS>Concensus of opinion
[Also consider REAGENT grade.]
This would be fairly high percentage you are talking about here though
wouldn't it? My research suggests there is your 'plain' HP, (3% or 6% as
sold OTC), 'up to and including 35% Food Grade' HP, (which I can't get
pharmacists to co-operate with in my enquiries), and then it goes into
the
higher percentages over 35%, eg; 70%, 90% etc, which comes into the
'Reagent' terminology as it starts to get somewhat 'unstable' above 35%,
(if
one doesn't know what one is doing that is)...would I be correct in
saying
anything above 35% would fall into the 'Reagent' catagory...Yes?
Perhaps the above descriptions could be a simple dialect thing regarding
'definition' or 'terminology' and not a standard form of global
definition
with regard to Hydrogen Peroxide.
Thanks...Neville.
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