From: Jim O'Connor <oconnor.jim77**At_Symbol_Here**GMAIL.COM>
Subject: Re: [DCHAS-L] Dichloromethane storage?
Date: Fri, 11 Apr 2014 14:57:53 -0400
Reply-To: DCHAS-L <DCHAS-L**At_Symbol_Here**MED.CORNELL.EDU>
Message-ID: 38A13903-280F-403E-8278-1EE32CD2AABB**At_Symbol_Here**

Sigma Aldrich has a SDS that says, "Heat sensitive. Store under inert gas" I don't agree with that statement but thought you should know about the ref. My experience says the inert gas recommendation is to prevent it from evaporating while storing. A liquid seal cap should negate the need for the inert gas too I think.

Sent from my iPhone

> On Apr 11, 2014, at 12:39 PM, "Ralph B. Stuart" wrote:
> A lab tech noticed a statement on a Dichloromethane bottle that said "store under an inert gas". He would like to know if this is a safety recommendation or designed to maintain the quality of the chemical by avoiding exposure to environmental gases. From what I can find, it appears to be the latter, but I thought I would ask DCHAS-L to see if anyone knows of a safety reason for this recommendation.
> Thanks for any help with this.
> - Ralph
> Ralph Stuart CIH
> Chemical Hygiene Officer
> Department of Environmental Health and Safety
> Cornell University
> rstuart**At_Symbol_Here**

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