Re: Amphipathic dye reccomendation?

On May 20, 6:42 pm, Bill Penrose <penr...@xxxxxxx> wrote:
On May 20, 3:09 pm, "michalc...@xxxxxxx" <michalc...@xxxxxxx> wrote:

Hi, I am a high school science teacher. I am looking for a dye that
will dissolve in water (to some extent) but them segregate to an
immiscible oil layer.

I had a demo once involving a little iodine dissolved in KI solution.
The result is a brown solution. When an organic solvent is added, the
iodine is extracted into the solvent, coloring it purple.

A dye would be safer, but nothing comes to mind at the moment.
Histology texts segregate stains according to whether they dissolved
in fat or water.

DB

Actually, I am not too worried about tincture of iodine. Obviously it
is poisonous and needs to be handled properly, I do think tghis is a
good solution (pun intended).
.

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