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December 2001

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Subject:
From:
"Faraci, Jennifer L" <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Wed, 12 Dec 2001 10:20:26 -0700
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Do you have any idea how either of these (Sodium Silicate or Silicon
Dioxide) will effect the electrical performance of circuit cards?

-----Original Message-----
From: <Rudy Sedlak> [mailto:[log in to unmask]]
Sent: Tuesday, December 11, 2001 1:21 PM
To: [log in to unmask]
Subject: Re: [TN] Sodium Silicate Contamination


Jennifer:

You probably did not discover Sodium Silcate...which, in small particles and
quantities is rapidly neutralized by the Carbon Dioxide in air to a form of
Hydrated Silicon Dioxide.....which is actually known as "Silicic Acid", but
is about as acidic as Carbon Dioxide in air..

The truth is that the stuff in small quantities is essentially harmless to
human beings.  I would ignore it.

If you want to clean it up, probably the only reasonable way is to use a
simple mild detergent solution.  If you want to remove every last atom of
Silicon Dioxide you would have to use some VERY hazardous chemicals.

My advice: Have a nice holiday...if people want to feel like they have "done
something to cure the problem"...wash the floor.

Rudy Sedlak
RD Chemical Company

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