From: Tiffany Freedman <trush1**At_Symbol_Here**CITADEL.EDU>
Subject: Re: [DCHAS-L] Questions on Crown Ethers
Date: Mon, 2 Jul 2018 15:00:10 +0000
Reply-To: ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**PRINCETON.EDU>
Message-ID: SN2PR01MB21765AE707093687912FFB368B430**At_Symbol_Here**SN2PR01MB2176.prod.exchangelabs.com
In-Reply-To


Thank you so much for the leads on the crown ethers!  I will work from here and let you know if anything else interesting comes up.  If there is anything else, please don't hesitate to share.

 

Thanks!

Tiffany

 

From: ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**PRINCETON.EDU> On Behalf Of James Duncan
Sent: Saturday, June 30, 2018 2:46 PM
To: DCHAS-L**At_Symbol_Here**PRINCETON.EDU
Subject: Re: [DCHAS-L] Questions on Crown Ethers

 

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'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

 

--- For more information about the DCHAS-L e-mail list, contact the Divisional membership chair at membership**At_Symbol_Here**dchas.org Follow us on Twitter **At_Symbol_Here**acsdchas

--- For more information about the DCHAS-L e-mail list, contact the Divisional membership chair at membership**At_Symbol_Here**dchas.org Follow us on Twitter **At_Symbol_Here**acsdchas

 

--- For more information about the DCHAS-L e-mail list, contact the Divisional membership chair at membership**At_Symbol_Here**dchas.org Follow us on Twitter **At_Symbol_Here**acsdchas

Previous post   |  Top of Page   |   Next post



The content of this page reflects the personal opinion(s) of the author(s) only, not the American Chemical Society, ILPI, Safety Emporium, or any other party. Use of any information on this page is at the reader's own risk. Unauthorized reproduction of these materials is prohibited. Send questions/comments about the archive to secretary@dchas.org.
The maintenance and hosting of the DCHAS-L archive is provided through the generous support of Safety Emporium.