| About This Archive | | DCHAS-L 2017 Index | | DCHAS-L Yearly Index | |
Check out Safety Emporium for your N95, N99, and face shield needs.
|
Previous by Date: Subject: Re: [DCHAS-L] Gases that may Autopolymerize Date: Wednesday, April 12, 2017 at 1:13:44 PM Author: "Stuart, Ralph" <Ralph.Stuart**At_Symbol_Here**KEENE.EDU> |
Next by Date: Subject: [DCHAS-L] National Academy Press publication: Fostering Integrity in Research Date: Thu, 13 Apr 2017 11:42:30 +0000 Author: "Stuart, Ralph" |
Chloroprene is will still disperse in all directions and fill the room like any other gas or vapor. The bigger molecules mix a little slower, but mix and disperse they will. It's why the chlorofluoro hydrocarbons are now chewing on the ozone layer. Molecules of gases and vapors behave pretty much as weightless when they are mixed with air molecules and at the same temperature.
So don't look for chloroprene to be concentrated at the floor because it won't be there.
Remember the Bowling Green State U video of mercury vapor rising.
---
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
Monona Rossol, M.S., M.F.A., Industrial Hygienist
President: Arts, Crafts & Theater Safety, Inc.
Safety Officer: Local USA829, IATSE
181 Thompson St., #23
New York, NY 10012 212-777-0062
-----Original Message-----
From: TILAK CHANDRA <tilak.chandra**At_Symbol_Here**WISC.EDU>
To: DCHAS-L <DCHAS-L**At_Symbol_Here**PRINCETON.EDU>
Sent: Wed, Apr 12, 2017 11:43 am
Subject: Re: [DCHAS-L] Gases that may Autopolymerize
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.
---
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
---
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
Previous post | Top of Page | Next post