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Subject: [DCHAS-L] ANSI eyeware designations
Date: Thursday, September 24, 2015 4:34:42 PM
Author: "Stuart, Ralph" <Ralph.Stuart**At_Symbol_Here**keene.edu> 		Next by Date:
Subject: Re: [DCHAS-L] ANSI eyeware designations
Date: Thu, 24 Sep 2015 17:29:07 -0400
Author: Monona Rossol

From: Lee Latimer <lhlatimer**At_Symbol_Here**MINDSPRING.COM>
Subject: Re: [DCHAS-L] Pyrophorics
Date: Thu, 24 Sep 2015 13:40:17 -0700
Reply-To: DCHAS-L <DCHAS-L**At_Symbol_Here**MED.CORNELL.EDU>
Message-ID: D229ADC1.232E0%lhlatimer**At_Symbol_Here**mindspring.com
In-Reply-To <012201d0f705$aa33c100$fe9b4300$**At_Symbol_Here**chemical-safety.com>


Neal – call Foote/Lithco or other manufacturers who should be the most direct source.  It has to matter to them or whoever make it in bulk.  I’m not sure what the typical O2 content is of house N2, but that has always been fine for my work with alkyl lithium reagents either commercial or bulk.  Of course, the use of locking syringes and maintaining the needle tip in an inert atmosphere (i.e N2, O2-scrubbed N2 or Argon) is best practice.  Some prefer Argon, but the same applies.  And skill..

Lee



On 9/24/15, 1:14 PM, "NEAL LANGERMAN" <neal**At_Symbol_Here**chemical-safety.com> wrote:

Does anyone have any citations for the low limiting oxygen concentration of pyrophoric compounds.  I am specifically looking for the oxygen percentage at which compounds such as t-BuLi become non-ignitable.  For example, that value is 5% for hydrogen.  I have found a reference for silane, but, as is typical for silane, there are a myriad of confounding issues.
 
I have searched both SciFinder and Science Direct and have not found helpful data.
 
Thanks
 
Neal
 
 
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