Re: pinhole freeing stuck glass stopper

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From: NFetter@aol.com
Date: Thu Apr 14 2005 - 22:38:22 PDT 

From: NFetter@aol.com
Message-ID: <f7.4e7db99c.2f90ad4e@aol.com>
Date: Fri, 15 Apr 2005 01:38:22 EDT
Subject: Re: pinhole freeing stuck glass stopper

Hi Geoff,
Throw the bottle away--carefully. The NaOH has welded the stopper to the
bottle and there is no way to free it. Never store strong alkaline solutions in
glass containers. Always use polyethylene or polypropylene containers to store
even dilute soutions of strong bases such as NaOH and KOH. Never store alkaline
solutions in volumetric flasks. The basic solution will dissolve the glass
around the hash mark rendering it invisible and will most like freeze the glass
stopper to the flask.
Neil Fetter

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