From: Laurence cuffe <cuffe@xxxxxxx>
To: pure-silver@xxxxxxxxxxxxx
Sent: Sat, October 16, 2010 10:42:01 AM
Subject: [pure-silver] Re: Citric Acid as stop bath
I know when I was supervising second year Organic Chemistry
practicalls, phenol was considered to be one of the nastiest
chemicals we had to handle. Skin burns can be very difficult to
treat. We often confuse familiarity with safety. Common salt, and
petrol (gas) are two common chemicals I use when looking for a
benchmark to compare safety information on a chemical with. On this
comparison phenol comes out on the nasty side.
There is some fairly comprehensive information here:
http://www.atsdr.cdc.gov/mhmi/mmg115.html
I was particularly struck by this piece:
Phenol vapor and liquid penetrate the skin with an absorption
efficiency approximately equal to the absorption efficiency by
inhalation. In one case, death occurred within 30 minutes after skin
contact.
All the best and have fun!
Laurence Cuffe
On 16 Oct 2010, at 00:42, Richard Knoppow wrote:
----- Original Message ----- From: <mark@xxxxxxxxxxxxxxxxxx>
To: <pure-silver@xxxxxxxxxxxxx>
Sent: Friday, October 15, 2010 3:26 PM
Subject: [pure-silver] Re: Citric Acid as stop bath
Richard that sounds like the voice of experience there. There would
have been days I would have loved to have dealt with the taste of
Lifeboy, but that wasn't mom. When she was really mad, she would
send you out to get your own switch.
Turns out its Lifebouy. I think the carbolic acid in it would
have been worse even than the Stodard solvent in Fels Naptha. My
mom would not allow Lifebouy in the house, partly because of its
odor and partly because it would take your skin right off. It was
popular in institutions because of its claimed antiseptic
properties. I think the phenol was pretty toxic. We did have Fels
Naptha, it was used strictly for difficult laundry.
Fels Naptha is still made but no longer has Stodard Solvent in
it but Lifebouy with carbolic is evidently still on the market in
some parts of the world.
The Lifebouy radio commercials featured a vocalized fog horn
effect, the key line was "Why have BEEE OHHHH, with the BO
vocalized with the fog horn. There was at the time a machine for
producing speaking sound effects, I have forotten the name of it.
It was used for Bromo-Seltzer commercials with the sound of a
locomotive and was the effect used in the movie "Letter to Three
Wives". I think it was also used for the Lifebouy commercial but
its been so long since I've heard it I can't be sure. Not to be
confused with the deoderant that advertised "Don't be half-safe" I
can't remember what that was either.
--
Richard Knoppow
Los Angeles
WB6KBL
dickburk@xxxxxxxxxxxxx
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