From:
Monona Rossol <0000030664c37427-dmarc-request**At_Symbol_Here**LISTS.PRINCETON.EDU>
Subject:
Re: [DCHAS-L] [External] Re: [DCHAS-L] OSHA materials on Karen Wetterhahn's mercury exposure
Date:
Mar 22, 2022 17:30 UTC
Reply-To:
Monona Rossol
In-Reply-To:
Bless your heart, Sammye. Youngsters should see how bad these documents where at that time. Even from the better companies. And it also explains why the EU adopted the GHS SDSs and then gave us until 2015 to straighten up and do the same or quit exporting to them. I still meet people who think OSHA decided to do this!
Monona
-----Original Message-----
From: Samuella Sigmann <sigmannsb**At_Symbol_Here**APPSTATE.EDU>
To: DCHAS-L**At_Symbol_Here**Princeton.EDU
Sent: Tue, Mar 22, 2022 12:03 pm
Subject: Re: [DCHAS-L] [External] Re: [DCHAS-L] OSHA materials on Karen Wetterhahn's mercury exposure
Found a Aldrich MSDS from 1994.
https://ehslegacy.unr.edu/msdsfiles/4627.pdf
On 3/22/2022 11:06 AM, Monona Rossol
wrote:
I'd
be very interested in anything you find on this, James. And
when the chemical the glove is made from does not also include
the mil thickness, that is pretty useless information. If you
doubt this, look at Kimberly Clark's thin mill nitrile charts.
Most of those solvents go through in a minute or two.
Monona
-----Original Message-----
From: James Kaufman
<jkaufman**At_Symbol_Here**LABSAFETYINSTITUTE.ORG>
To: DCHAS-L**At_Symbol_Here**Princeton.EDU
Sent: Tue, Mar 22, 2022 10:25 am
Subject: Re: [DCHAS-L] OSHA materials on Karen
Wetterhahn's mercury exposure
Can anyone share a copy of the MSDS
that was from the actual DMM supplier? ... Jim
PS. The
CSB video said
that MSDS
recommended
latex gloves.
I have been
unable to
locate the
MSDS. I did
get one from
Strem Chemicals
from that
timeframe but
it did not say
that.
James A. Kaufman, PhD
Founder/President
Emeritus
The
Laboratory
Safety
Institute
(LSI)
A Nonprofit
Educational
Organization
for Safety in
Science,
Industry, and
Education
192
Worcester
Street,
Natick, MA
01760-2252
(O)
508-647-1900
(F)
508-647-0062
(C)
508-574-6264
Skype:
labsafe;
508-401-7406
>And
wondering about Karen's gloves, were they
standard dry-box gloves or did she double glove
them inside of the glove-box with another type
of glove, as we sometimes double glove with our
disposable tactile gloves.
I believe that Dr. Wetterhahn was working in a
fume hood rather than a glove box on the
occasion of her mercury exposure. I assume that
she was using the fume hood to control the fire
hazard associated with the dimethyl mercury
(flashpoint = 5 degrees C), but the fume hood
does not add value with regard to dermal
toxicity hazards; and latex gloves add minimial
protective value as well. OSHA reports that the
dexterity value of the latex gloves led to that
choice. I believe that the OSHA presentation on
this event suggested that Silvershield gloves
were the only appropriate choice at that time.
One of the learning points I take from this
story is the challenge of working with chemicals
that present multiple hazards while balancing
chemical and human factors.
- Ralph
Ralph Stuart, CIH, CCHO
ralph**At_Symbol_Here**rstuartcih.org
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--
******************************************************************************
Samuella B. Sigmann, MS,
NRCC-CHO
Appalachian State University,
Retired
Phone: 336 877 5147
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