From: Ellen M. Sweet <ems325**At_Symbol_Here**>
Subject: Re: [DCHAS-L] Questions on Crown Ethers
Date: Sat, 30 Jun 2018 14:00:00 +0000
Reply-To: ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**PRINCETON.EDU>
Message-ID: BL0PR04MB4452658F131A574808146CE29A4D0**At_Symbol_Here**

Hi Tiffany,

This is a treasure hunt to sit and drink over my morning coffee! Here it goes:

A Wiki- search to get started:

There’s several varieties, so checking each one you have is important. You’ll want to weed out the poisons and corrosives from the ones that are actually reactive (DOT Class 4’s).


I looked up “azacrowns” first thinking they would be the most likely to be reactive. Here’s one example. It’s just corrosive:


If they are in liquid form they may be in acetonitrile, THF, methanol, cyclohexane, benzene, or toluene; which means you’re back to checking for peroxides:


At the bottom of this Wiki-page you can get to the Sigma Aldrich page and look up the SDS. 18-Crown-6 seems to be nothing, but I would not put it in the trash and freak out everyone down-stream; especially with the ever-present “no data available” throughout SDS.


I hope this gets you started!



From: ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**PRINCETON.EDU> On Behalf Of Tiffany Freedman
Sent: Friday, June 29, 2018 2:28 PM
Subject: [DCHAS-L] Questions on Crown Ethers



Good Afternoon All!


I hope everyone has had a good week…maybe enjoying a little cooler temperatures than we have in Charleston SC.  I have a question concerning the disposal of crown ethers.  This may be too broad of a question, but are there any special considerations with their disposal?  We are trying to rid ourselves of some “legacy” chemicals and I admit that I’m not very familiar with crown ethers.  Other ethers can be peroxide-forming and must be handled accordingly.  I’m told crown ethers are different, but I would feel better with some other guidance/advice.


Any insight would be greatly appreciated!







Tiffany CR Freedman

Laboratory Safety Manager

The Citadel-The Military College of SC

Office: 843-953-1067



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