From: Christopher Sleet <sleet.christopher**At_Symbol_Here**gmail.com>
Subject: Re: [DCHAS-L] These new articles for ACS Chemical Health & Safety are available online.
Date: Mon, 27 Dec 2021 11:52:24 -0600
Reply-To: ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**Princeton.EDU>
Message-ID: CAB4piHw-AvaqDJiJ9c_r21XVJ11OoKGUOmi+_L55kwpiRovJpg**At_Symbol_Here**mail.gmail.com
In-Reply-To <97628CBB-ECE3-4F68-BE90-214E40656B52**At_Symbol_Here**dchas.org>


Hello All,

From my experience with this equipment, I can rationalize a few motives for manual manipulation of the pressure. I'd be interested to hear everyone's thoughts from a safety perspective on how this could be improved:
Further, I have a question regarding the incident report:
If it was open to vacuum, I could easily see ether buildup in the vacuum/vacuum line adding to the UEL. I believe ensuring that stopcocks are closed to create a sealed system for the rotovap while not in use would be a great precaution not discussed in the paper. In theory, this would minimize entrainment into the cabinet during standby operation. Additionally, it does not need to be opened until the vacuum is actively engaged and functional via the switch mentioned that controls both vacuum and fan.

In general, an interesting analysis. Next step is the hard part, convincing the organic labs why they should follow these controls when this sort of operation has been performed this way for easily 100 years!

Kind regards,

Christopher E. Sleet, Ph.D.
Safety Specialist - Chemical Safety
Office of Safety and Business Continuity
The University of Texas Southwestern Medical Center

On Mon, Dec 27, 2021 at 5:49 AM Ralph Stuart <membership**At_Symbol_Here**dchas.org> wrote:
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