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Subject: [DCHAS-L] SO2 exposure
Date: Tuesday, March 12, 2019 at 11:03:13 AM
Author: David Roberts <droberts**At_Symbol_Here**DEPAUW.EDU> 		Next by Date:
Subject: Re: [DCHAS-L] SO2 exposure
Date: Tue, 12 Mar 2019 08:30:38 -0700
Author: Dan Blunk

From: Eugene Ngai <eugene_ngai**At_Symbol_Here**COMCAST.NET>
Subject: Re: [DCHAS-L] SO2 exposure
Date: Tue, 12 Mar 2019 11:27:56 -0400
Reply-To: ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**PRINCETON.EDU>
Message-ID: 001201d4d8e8$2dc16b90$894442b0$**At_Symbol_Here**comcast.net
In-Reply-To <201B991F-9E4F-47A6-A8D2-F0AF2BB60EE3**At_Symbol_Here**depauw.edu>


I would strongly recommend you download the AEGL document on SO2 at https://www.epa.gov/sites/production/files/2014-11/documents/sulfurdioxide_final_volume8_2010.pdf
It has a excellent review of exposures, symptoms and treatment

In my experience with toxic gas exposures, the person develops a taste and smell of the molecule. I can detect arsine and hydrogen selenide at ppb levels

Hope this helps. Send me an email for any further questions. Eugene_ngai**At_Symbol_Here**comcast.net

Eugene Ngai
Chemically Speaking LLC
www.chemicallyspeakingllc.com


-----Original Message-----
From: ACS Division of Chemical Health and Safety On Behalf Of David Roberts
Sent: Tuesday, March 12, 2019 11:03 AM
To: DCHAS-L**At_Symbol_Here**PRINCETON.EDU
Subject: [DCHAS-L] SO2 exposure

Hi all,

I was hoping somebody could help us out on an SO2 exposure issue. A few weeks back we had a faculty member defrosting a freezer in the lab. This was an old freezer (circa 30‰??s/40‰??s), and he was defrosting it to donate it to the theater department.

Long story short (too late), he ended up rupturing the coolant line, and all of the coolant released from the compressor. Turns out the coolant was SO2. He left the room soon, but he did get in some big breaths. He didn‰??t seem to form water in his lungs at the time (he did go to the doctor immediately). He still has a taste of sulfur, and he‰??s developed a rash that he feels is due to the exposure. Three weeks later he is still showing some symptoms, and so we are just trying to evaluate what he should do and how to handle this.

Any thoughts would be helpful. Thanks

Dave

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