[optimal] Re: Vegetable Dye

  • From: "Beth Koch" <bethkoch@xxxxxxxxxxxxxx>
  • To: <optimal@xxxxxxxxxxxxx>
  • Date: Fri, 9 Jul 2010 18:07:46 -0400

Hey Paul,

I am going to copy and paste this info to a sheet and give it to my docs.
They are forever selling this a veg based dye ( you know...carrots,
tomato...)  you gave some great food for thought!!!

Beth Koch COT, ROUB
Retina Consultants of WNY
What we have done for ourselves, alone dies with us,
What we do for others and the world remains and is immortal....
                         ~Albert Pike
-----Original Message-----
From: optimal-bounce@xxxxxxxxxxxxx [mailto:optimal-bounce@xxxxxxxxxxxxx] On
Behalf Of Montague, Paul R
Sent: Friday, July 09, 2010 5:54 PM
To: optimal@xxxxxxxxxxxxx
Subject: [optimal] Re: Vegetable Dye

That's a Euro tree.  Money grows on it.


-----Original Message-----
From: optimal-bounce@xxxxxxxxxxxxx [mailto:optimal-bounce@xxxxxxxxxxxxx]
On Behalf Of William Anderson
Sent: Friday, July 09, 2010 2:51 PM
To: 'optimal@xxxxxxxxxxxxx'
Subject: [optimal] Re: Vegetable Dye


WHAT, I thought it came from the Fluoreo tree that grows out in West
Texas and in the mountains in Utah. I heard the way it was discovered
was when the Glow Injuns were hunting Jacklopes at night under a blue
moon after the Jacklopes had eaten berries off of the Fluoreo tree all


>>> Paula Morris <paula.morris@xxxxxxxxxxxx> 7/9/2010 2:07 PM >>>
Hey Sarah,

The rumor exists because it was stated to be a vegetable dye extracted
from a plant resin first by Duke-Elder, and then by J Federman  in the
Intravenous Fluorescein Angiography chapter in Duane's Clinical
Ophthalmology, 1991.  That has since been corrected in more recent
editions of Duane's.

Fluorescein's basic component is naphthalene (an extract from  the
carbolic acid fraction of coal tar).  It is heated with mercury sulfate
and copper sulfate to 400-500 degrees Celsius to become phthallic
anhydride.  It is then heated with resorcinol to 200 degrees C. to
become resorcinolphthalein, or fluorescein, which is highly insoluble.
When resorcinolphthalein is dissolved in sodium hydroxide solution, it
becomes fluorescein sodium which is highly soluble and what we use in
retinal angiography.

Why do I know this?  Because our own Joe Warnicki challenged me back in
1990 to research "Where Does Fluorescein Come From?"  That quest led me
to research HJ Conn's biological Stains, the Merck index: An
Encyclopedia of Chemicals, Drugs and Biologicals, Remington's
Pharmaceutical Sciences, and Drug Facts and Comparisons.  Fluorescein
Sodium is a synthetic dye assigned by the government to be called
F,(food), D (drugs), & C(cosmetics) color yellow #8.  The F,D,C colors
are only given to synthetic dyes.

So - it has a vegetable base if you want to harken back to pre-historic
history as plants contributed to the formation of coal deposits, but
more recently I think you could safely say it has a mineral source -
naphthalene, ths tuff that makes moth balls stink.  Probably don't want
to tell you patients that...............

And Thus endeth the chemistry lesson!


From: optimal-bounce@xxxxxxxxxxxxx [mailto:optimal-bounce@xxxxxxxxxxxxx]
On Behalf Of Sarah Moyer
Sent: Friday, July 09, 2010 10:06 AM
To: optimal@xxxxxxxxxxxxx 
Subject: [optimal] Vegetable Dye

July is here and so are the new residents!  During a lecture/discussion
about fluorescein sodium yesterday, we discussed how fluorescein sodium
is a synthetic dye and NOT a vegetable dye.  One of them had already
read/heard it was a vegetable dye.  He asked if there were ever
ingredients in the dye that were vegetable based and if that is why this
rumor exists.  Does anybody know why some people refer to it as a
vegetable dye?


Sarah Moyer
University of North Carolina

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