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From: Ralph Stuart <ralph**At_Symbol_Here**rstuartcih.org>
Subject: Re: [DCHAS-L] OSHA materials on Karen Wetterhahn's mercury exposure
Date: Tue, 22 Mar 2022 13:31:40 -0400
Reply-To: ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**Princeton.EDU>
Message-ID: 48E58A94-0EB1-4C11-974B-FF08B0D8F3E4**At_Symbol_Here**rstuartcih.org
In-Reply-To

Demystify: 

> if I remember correctly the chemical was actually synthesized for Sigma by a subcontractor in his garage that used Silvershield but his glove selection was not noted until after the incident.

I wonder who writes the (M)SDS in this situation? Sigma or the garage chemist? This goes back to my earlier concerns about the transfer of risk information as chemicals change hands...

It's interesting to note that only 2 of the 3 GHS information sources cited by the PubChem LCSS
https://pubchem.ncbi.nlm.nih.gov/compound/11645#datasheet=LCSS§ion=GHS-Classification&fullscreen=true
include the flammable hazard for dimethyl mercury, although the flashpoint is clearly 4 degees C according to Wikipedia as well as commercial sources.

- Ralph

Ralph Stuart, CIH, CCHO
ralph**At_Symbol_Here**rstuartcih.org

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