paraformal. and zinc formalin

From:Dina Gaupp <>

Hey histonetters,

Can anyone out there in histoland tell me what is better paraformaldehyde or 
zinc formalin.  I've read a few books and my opinion is zinc formalin.  I would 
like the experts in histoland's opinion.  Does anyone know if you can fix your 
tissues in paraformaldehyde and process the tissue in zinc formalin?  I've 
asked the sales representatives this question and they had no clue????????????
Paraformaldehyde is very expensive to process in a tissue process, plus its not 
stable unless at 4 degree Centigrade, which is impossible for tissue that will 
be embedded in paraffin.

Any help would be appreciated,

Dina D. Gaupp, MT
Tulane Medical Center
Center for Gene Therapy

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