Re: alcohols

From:Philip Oshel <>

Ethanol may be flushed down a sink so long as it is diluted with 
enough water to lower the concentration to below 70%. This is to 
raise the flash point.
Mind, this is for ethanol. If it's contaminated with fun things like 
ferrocyanide or whatever, then the ferrocyanide or whatever disposal 
rules apply.


>     This is perhaps a very simple question....but what do other labs do with
>their 95% alcohols?  I know recycling is what happens most.  Does anyone know
>if it is okay, or outrageous to dispose of 95% alcohols down the sink when
>there is too much to recycle?  I read in some literature that putting 95%
>alcohol down the drain was okay, but with large amounts of water.  How much
>95% is okay for sink disposal?

Philip Oshel
Supervisor, AMFSC and BBPIC microscopy facilities
Department of Animal Sciences
University of Wisconsin
1675 Observatory Drive
Madison,  WI  53706 - 1284
voice: (608) 263-4162
fax: (608) 262-5157 (dept. fax)

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