[Histonet] Re: Formalin Neutralizer

[Rene J Buesa]

Benjamin:
You are wrong again because "formalin" is the commercial brand name used to define the about 47% aq. solution of methanal in dist. water and, as a matter of fact, it does contain an additive (methanol) to prevent its polymerization into para-formaldehyde.
René J.

From: Benjamin <benjamin <@t> histologistics.com>
To: Bob Richmond <rsrichmond <@t> gmail.com> 
Cc: "Histonet <@t> lists.utsouthwestern.edu" <histonet <@t> lists.utsouthwestern.edu> 
Sent: Saturday, April 13, 2013 6:04 PM
Subject: Re: [Histonet] Re: Formalin Neutralizer


I am posting that my last comment about formalin was wrong about the odor, it does not have any additives. And as far as dumping it down the drain follow your local regs!!

Sent from my iPhone

On Apr 13, 2013, at 2:09 PM, Bob Richmond <rsrichmond <@t> gmail.com> wrote:

> I'm surprised that the dismal topic of formaldehyde neutralization never
> seems to get settled.
> 
> I have a litre of 10% neutral buffered formalin. How many grams of sodium
> sulfite (or bisulfite, or metabisulfite) do I have to weigh out and pour in
> to neutralize it? What is the chemical reaction? Is ammonia also required?
> and if so, I've got the same questions about ammonia.
> 
> Will the Herrn Inschpektors allow me to use generic chemicals, or do I have
> to buy some expensive proprietary product in order to satisfy them?
> 
> Bob Richmond
> Samurai Pathologist
> Maryville TN
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