RE: [Histonet] Zinc Formalin for Bone Marrow Biopsies

From:"Horn, Hazel V"

We use zinc formalin to fix all of our tissues.   It will not harm the
biopsy to left overnight.   Our formalin is disposed of as hazardous
waste and would be even without the zinc.   You will need to wash the
bone marrows after fixation as zinc formalin does not mix well with
regular buffered formalin.  A cloudy precipitate will form if you do not
wash after zinc fixation.

Hazel Horn
Hazel Horn, HT/HTL (ASCP)
Supervisor of Histology
Arkansas Children's Hospital
800 Marshall    Slot 820
Little Rock, AR   72202

phone   501.364.4240
fax        501.364.3155

visit us on the web at:

-----Original Message-----
[] On Behalf Of Smith
Sent: Wednesday, October 08, 2008 8:02 AM
Subject: [Histonet] Zinc Formalin for Bone Marrow Biopsies

Good Morning,
We have substituted Zinc Formalin for B5 for our BM bxs.  I have a few
questions I hope someone can help me with.
1.  We increased fixation time 1.5 times from the B5.  Question:  Is
there a maximum amount of time the bxs can stay in the ZF without
causing harm to the bx?  If a BM Bx stays in Zinc Formalin overnight,
will that harm the cellular morphology?
2.  Can Zinc Formalin be disposed of the same way we dispose of our 10%
NBF?  The B5 had to be picked up for special disposal due to the mercury
content.  Is there special handling for Zinc Formalin?
Thanks and have a great day!!!

Pathology Supervisor
9330 Medical Plaza Drive
Charleston, SC  29406
843-847-4296 fax

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