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Previous by Date: Subject: Re: [DCHAS-L] Methyl Vinyl Ketone mystery Date: Saturday, April 20, 2019 at 12:14:37 PM Author: Daniel Crowl <crowl**At_Symbol_Here**MTU.EDU> |
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Dan has the wrong chemical in mind. Rob was not asking about MEK. Instead, he's asking about methyl vinyl ketone. But Dan is accidentally right in stating that MVK is in some art products. And it is even in some dry erase markers. The marker-makers definitely don't have our health in mind. It has a TLV Ceiling limit of 0.01 ppm (2018) and is listed as a skin and respiratory sensitizer in the EU, so that is one toxic dude.
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It pops up all over the art products and paint world, in some caulks, and other odd places. Lots of luck finding the source. And if you do, let us know. I'd be interested.
Monona
-----Original Message-----
From: Daniel Crowl <crowl**At_Symbol_Here**MTU.EDU>
To: DCHAS-L <DCHAS-L**At_Symbol_Here**PRINCETON.EDU>
Sent: Sat, Apr 20, 2019 3:39 pm
Subject: Re: [DCHAS-L] Methyl Vinyl Ketone mystery
Hi Rob,
MEK is used as a solvent in a whole lot of paints, inks and colorants.
On the NFPA diamond, it has a health rating of 1, a flammability rating of 3 and a stability (reactivity) rating of 0. The largest hazard is flammability.
The TLV is 200 ppm.
I was in a paint plant once and they used MEK with mops to clean out the paint totes. MEK doers anesthetize the olfactory organs so if you exposed to it for a while you can't smell it.
Dan Crowl
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On Sat, Apr 20, 2019 at 10:06 AM Tammy M. Lutz-Rechtin <tlutzrec**At_Symbol_Here**uark.edu> wrote:
Check the floor/tile stripping and removal products. If they are using these in the building at night without adequate ventilation that might be your source.
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Tammy
Sent from my iPhone
I have extremely limited information on this and it's basically third or fourth hand, so just going with what little I was told.
A colleague reports that an entire research building on their campus was shut down after they discovered methyl vinyl ketone was behind a rash of respiratory issues among the building occupants. I have to assume they had an industrial hygienist do some air
quality testing. Apparently, nobody in the building uses the stuff and there are no records of anyone in the building purchasing it (I will have to suggest they do that check again but supply the synonyms but-3-en-2-one, butenone, and methylene acetone).
My colleague mentioned something about drain traps and the ventilation system but it was unclear whether those were accurately identified as the source.
So, obviously, we all know MVK is nasty, bad stuff. My questions for the collective wisdom of the list are 1) has anyone run into something like this before and 2) is anyone aware of a use for MVK in the building trades or related areas that
could explain this if say, a painter, plumber, HVAC person etc. were to have done work and maybe poured MVK waste down the drain etc.?
I will try to get further info, but with the holiday weekend this is all I am likely to have for the immediate short-term.
Best wishes,
Rob Toreki
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