Re: brazilin
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From: | "J. A. Kiernan" <jkiernan@julian.uwo.ca> |
To: | "Smith, Allen" <asmith@mail.barry.edu> |
Reply-To: | |
Content-Type: | TEXT/PLAIN; charset=US-ASCII |
On Sun, 27 Aug 2000, Smith, Allen wrote:
> I used to use brazilin, but I have been unable to find it lately. Where can
> I buy it?
Dear Allen, Your question may be of wider interest, so I'm
forwarding the answer to HistoNet, in the hope that someone
knows a less expensive supplier. I could find Brazilin in only
two catalogues. Details below.
I like alum-brazilin as a red nuclear stain, but the dyestuff
has become ridiculously expensive in the last 10 years or so.
I've still got a bit left over from the 1970s when its price
wasn't in any way remarkable.
Brazilin. CI 74280 Natural red 24
ICN Biomedicals Inc. Cat # 154862 US$58 for 1 gm.
VWR Canlab Rare & Fine Chemicals. Cat # 205613 US$1776.50 for 10 gm.
(VWR say they can supply smaller amounts!)
The 2nd of these catalogues is more recent (2000). It seems
to be an ICN catalog in a VWR wrapper.
Brazilwood chips can be bought for back-to-nature home dyeing.
Brazilin is obtained by evaporating an alcoholic extract, in
just the same way that haematoxylin is made from logwood.
Sounds easy if you have the time; I've never tried it myself.
Some years ago a Histonetter in Australia reported having
made some workable haematoxylin out of home-grown logwood,
and there was other correspondence about this and brazilin
around the same time. It should be in the Archives.
John A. Kiernan,
Department of Anatomy & Cell Biology,
The University of Western Ontario,
LONDON, Canada N6A 5C1
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