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From: James Duncan <jimandjoanneduncan**At_Symbol_Here**GMAIL.COM>
Subject: Re: [DCHAS-L] Questions on Crown Ethers
Date: Sat, 30 Jun 2018 11:45:56 -0700
Reply-To: ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**PRINCETON.EDU>
Message-ID: CAAFfSJT7p3v5hK3MS+Chg406=WzKUOSmL9=2TmkRoB4zfxqOkQ**At_Symbol_Here**mail.gmail.com
In-Reply-To


Tiffany,

You may want to contact IBC Advanced Technologies as they make crown ethers. Their website is: http://www.ibcmrt.com/products/

I hope this will help. Jim

Jim Duncan, PhD

On Sat, Jun 30, 2018 at 7:00 AM, Ellen M. Sweet <ems325**At_Symbol_Here**cornell.edu> wrote:

Hi Tiffany,

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

A Wiki- search to get started: https://en.wikipedia.org/wiki/Crown_ether

There's several varieties, so checking each one you have is important. You=E2=80™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:

http://www.tcichemicals.com/eshop/en/sg/commodity/T1874/

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:

https://en.wikipedia.org/wiki/18-Crown-6

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!

Ellen

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
To: DCHAS-L**At_Symbol_Here**PRINCETON.EDU
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!

Thanks!

Tiffany

Tiffany CR Freedman

Laboratory Safety Manager

The Citadel-The Military College of SC

Office: 843-953-1067

trush1**At_Symbol_Here**citadel.edu

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