RE: [Histonet] Isopropanol tissue processing

From:"Stapf, Ross"

I think the company that sells the Bond Immunostainer (Vision
Biosystems) has developed a process that makes replacing Xylene with
Isopropyl Alcohol possible.  It has something to do with the heat I
think.  I was talking with their rep James about this.  I admit I still
have a lot of questions about the process, but apparently it is

Ross M Stapf
Histopathology Manager
Baylor University Medical Center
3500 Gaston Ave.
Dallas, TX 75246

214-820-4110 fax

-----Original Message-----
[] On Behalf Of Gayle
Sent: Thursday, March 18, 2004 10:01 AM
To: Histology;
Subject: Re: [Histonet] Isopropanol tissue processing

We used isopropanol was used in place of ethyl alcohol as a dehydrant,
but never replaced the xylene step just before paraffin with it.  I
don't think isopropyl alcohol is miscible with paraffin.  My Merck index
says isopropyl  is miscible with water, alcohol, ether and chloroform
(carcinogenic) but nothing said about paraffin. 

After isopropyl gradient we cleared with xylene.  You will still need a
clearant, ie. xylene or one of the xylene substitutes to remove alcohol
before infiltration with paraffin.  Maybe a better solution is to find a
better clearant substitute before paraffin.

At 11:42 AM 3/18/2004 +1100, you wrote:
>Hi There
>Does anyone use Isopropanol in routine overnight parraffin processing
replacing xylol?? If you are willing could you please supply any
protocols you may use.
>Thanks for your help.
>SDS Pathology
>Sydney, NSW,Australia _______________________________________________
>Histonet mailing list
Gayle Callis
Research Histopathology Supervisor
Veterinary Molecular Biology

Montana State University - Bozeman
PO Box 173610
Bozeman MT 59717-3610
406 994-6367 (lab with voice mail)
406 994-4303 (FAX)

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