I don't know if it neutralizes it, but I imagine it will reduce it - we
accomplish the same thing by adding our sodium thiosulfate to the waste
silver.  However, we do not put anything down the drain - it all gets
disposed of as hazardous waste.

Mary

>>> HistoScientific <histosci@shentel.net> - 11/1/1999 8:47 AM >>>
Dear Netters,

I recently visited a large histology research laboratory where they mix
deionized salt (yes, Morton's table salt) with their Silver Nitrate
waste and dump it down the drain.  They swear that it neutralizes the
Silver Nitrate waste.  Is this true?  Does anyone else use this
"protocol".  I look forward to your responses.

Sincerely,

Tom Galati
Histo-Scientific Research Labs.
107 Killmon Road
P.O. Box 30
Basye, VA  22810
(540)856-2222
fax: (540)856-2227
histosci@shentel.net