From:
Jonathan Dannatt <jdannatt**At_Symbol_Here**UDALLAS.EDU>
Subject:
[DCHAS-L] DCM in small academic research labs
Date:
Jun 13, 2024 21:00 UTC
Reply-To:
ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**Princeton.EDU>
Message-ID:
<CAEiU9vDK80EVorROwBFf2dmR9uSnEBRWVQp4isQy7Ok+cz0Z4w**At_Symbol_Here**mail.gmail.com>
In-Reply-To:
Hey all,
I'm sure there have been conversations about the EPA ruling here, but I was hoping for a bit of a summary and some advice.
Is it clear what we will need to do to continue using DCM as a solvent? We already try to avoid it, but it works really well for some of our reactions.
Also, are there DCM detectors we can use in the lab to see if the levels get too high? I've found MOS sensors. They seem to detect gases by measuring changes in the electrical resistance of a metal oxide film when exposed to air. Would something like this work? It would technically measure any gas not just DCM. I worry in a standard organic lab it would measure acetone and give false positives.
Is anyone aware of any literature that discusses the concentration of DCM outside of a hood when someone does say an extraction, or any other standard organic technique?
Any advice/thoughts would be appreciated.
Thank you!
Jonathan
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