Well,

What about:
        4% formaldehyde for solution prepared from powdered paraformaldehyde
        10% formalin for solution prepared from concentrated formalin.
Tony

-----Original Message-----
From: Vinnie Della Speranza [mailto:dellav@musc.edu]
Sent: Thursday, 9 January 2003 9:30
To: AnthonyH@chw.edu.au; histonet@pathology.swmed.edu
Subject: Re: Sink the para from paraformaldehyde

Tony,
if we do as you suggest, how will we distinguish from commercial
formalin (10%) and formaldehyde solutions containing trace amounts of
methanol? I believe that when individuals refer to 4% paraformaldehyde
they are trying to indicate methanol-free formaldehyde

Vinnie

Vinnie Della Speranza
Manager for Anatomic Pathology Services
Medical University of South Carolina
165 Ashley Avenue  Suite 309
Charleston, SC 29425
Ph: 843-792-6353
fax: 843-792-8974

>>> Tony Henwood <AnthonyH@chw.edu.au> 01/08/03 05:01PM >>>

Hi all,

I've noticed too many histonet postings using the term "4%
paraformaldehyde".

Could I recommend that we remove the para from 4% paraformaldehyde
solutions.

Paraformaldehyde is a powder.

In solution it becomes formaldehyde.

Tony Henwood JP, BappSc, GradDipSysAnalys, CT(ASC)
Laboratory Manager
The Children's Hospital at  Westmead,
Locked Bag 4001, Westmead, 2145, AUSTRALIA.
Tel: (02) 9845 3306
Fax: (02) 9845 3318

http://www.histosearch.com/homepages/TonyHenwood/default.html
http://us.geocities.com/tonyhenwoodau/index.html

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