From: TILAK CHANDRA <tilak.chandra**At_Symbol_Here**WISC.EDU>
Subject: Re: [DCHAS-L] Gases that may Autopolymerize
Date: Wed, 12 Apr 2017 15:02:30 +0000
Reply-To: ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**PRINCETON.EDU>
Message-ID: DM5PR06MB3195B78B06F3F8248D48F88F88030**At_Symbol_Here**DM5PR06MB3195.namprd06.prod.outlook.com
In-Reply-To <016F5C65-6ED2-4689-8009-2BE1C37561EC**At_Symbol_Here**dchas.org>


Dear Ralph:

I would highly recommend conducting a Hazard assessment (What if analysis method; ACS) for these gases. Developing a valuable SOP depends how the chemical or gas is used for a manipulation or reaction.
These gases poses significant risk due to auto-polymerization and other chemical properties.
Chloroprene is heavier than air. Therefore, distant ignition is possible.

Also, theses cylinders should be equipped with a back-flow preventive devices when in use, because sucking back into cylinder will cause explosion/rupture.

Good luck.

Tilak

-----Original Message-----
From: ACS Division of Chemical Health and Safety [mailto:DCHAS-L**At_Symbol_Here**PRINCETON.EDU] On Behalf Of Secretary, ACS Division of Chemical Health and Safety
Sent: Monday, April 10, 2017 12:29 PM
To: DCHAS-L**At_Symbol_Here**PRINCETON.EDU
Subject: [DCHAS-L] Gases that may Autopolymerize

Can anyone suggest a more current information with regard to the question below? There have been no updates in JCHAS since the 1996 article.

Thanks for any help with this.

- Ralph

A colleague writes:
We reference your ??Classes of Peroxide-forming chemicals" (Source: Kelly, Richard J., Chemical Health & Safety, American Chemical Society, 1996, Sept, 28-36) in our SOP. Do you have an updated version of this or similar document?

I need to find more information about gases that may autopolymerize (quote from document is below) or otherwise become hazardous. When stored as a gas, these may autopolymerize as a result of peroxide accumulation:
- Butadiene
- Chloroprene
- Tetrafluoroethylene

I am writing an SOP about this.

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This e-mail is from DCHAS-L, the e-mail list of the ACS Division of Chemical Health and Safety.
For more information about the list, contact the Divisional secretary at secretary**At_Symbol_Here**dchas.org

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