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Hello Katherine and All,</div>
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To answer your immediate question, we've been using the amber/white nitrile cleanroom gloves with blue nitrile gloves on top at our solvent benches, for the various reasons folks have already presented. And, of course, safety glasses or a face-shield.</div>
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One safety concept that doesn't seem to get enough attention though, is that of SITUATIONAL AWARENESS. PPE is good and necessary, but the first line of defense is always going to be Situational Awareness: Pay attention, to what you are doing and what everyone
else is doing around you. Proceed carefully, be mindful of what your technique, KNOW what your chemicals are and what are their real hazards. If your bench neighbor seems distracted, hurried, inexperienced, scared... Help them out. They are part of your
"situation". Their spilled chemical will hurt just as handily as your own.</div>
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This concept seems to be one of the most powerful and underappreciated ones in Safety Land, and in Science generally.</div>
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I wish every safety training hammered away at this. But the right PPE is also good!</div>
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Mac</div>
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Harvard CNS</div>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> labnetwork <labnetwork-bounces@mtl.mit.edu> on behalf of Yakimov, Michael <myakimov@albany.edu><br>
<b>Sent:</b> Thursday, August 13, 2026 7:53 PM<br>
<b>To:</b> Katharine Beach <beach@umich.edu>; labnetwork@mtl.mit.edu <labnetwork@mtl.mit.edu><br>
<b>Subject:</b> Re: [labnetwork] Solvent Bench PPE</font>
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Katharine,</div>
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Thank you for bringing that up. Looks like NMP is in a process of being reevaluated, not unlike TMAH (and 2EE before that). Not as harshly as TCE, but we may brace for our safety departments getting the memo..</div>
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<a href="https://www.epa.gov/assessing-and-managing-chemicals-under-tsca/risk-evaluation-n-methylpyrrolidone-nmp-0">https://www.epa.gov/assessing-and-managing-chemicals-under-tsca/risk-evaluation-n-methylpyrrolidone-nmp-0</a></div>
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<a href="https://www.sciencedirect.com/science/article/pii/S0273230023000053">https://www.sciencedirect.com/science/article/pii/S0273230023000053</a></div>
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With that, another question you may want to look at is - what is the role of gloves when working with solvents? .</div>
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Breakthrough times for solvents for gloves are measured in minutes. I didn't see consistent datasets, but I heard acetone is 10-30 minutes on thin nitrile. (some handwaving about nitrile vs acetone-soluble ABS is removed). I certainly got photoresist smell
off my hands after taking off some completely intact blue nitrile golves before.</div>
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I do see a reference for 2 minutes breakthrough on thin nitrile for NMP in California, but I would take that with a grain of salt outside of CA.</div>
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But this might give you a flavor of how reliable things are. Looks like not very:</div>
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<a href="https://stacks.cdc.gov/view/cdc/185552">https://stacks.cdc.gov/view/cdc/185552</a></div>
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My impression is that gloves, even fancy ones, are not a real protection against solvents in most cases. But in a cleanroom environment, they are the way to remove contamination mechanically should it land on the glove. So it may be that best glove is a cheap
glove which people are willing to through away, rather than save for long time and/or reuse...</div>
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Just a thought</div>
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Mike</div>
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<p style="margin:0in; font-family:"Aptos",sans-serif; font-size:12pt">_______________________________________________</p>
<p style="margin:0in; font-family:"Aptos",sans-serif; font-size:12pt">Michael Yakimov</p>
<p style="margin:0in; font-family:"Aptos",sans-serif; font-size:12pt">Research scientist</p>
<p style="margin:0in; font-family:"Aptos",sans-serif; font-size:12pt">Department of Nanoscale Science and Engineering</p>
<p style="margin:0in; font-family:"Aptos",sans-serif; font-size:12pt">University at Albany - State University of NY</p>
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<p style="margin:0in; font-family:"Aptos",sans-serif; font-size:12pt">253 Fuller rd.</p>
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<p style="margin:0in; font-family:"Aptos",sans-serif; font-size:12pt">Phone: 518-437-8609 lab</p>
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<a href="mailto:myakimov@albany.edu" style="color:rgb(70,120,134); margin-top:0px; margin-bottom:0px"><u>myakimov@albany.edu</u></a></span></p>
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<b>From:</b> labnetwork <labnetwork-bounces@mtl.mit.edu> on behalf of Katharine Beach <beach@umich.edu><br>
<b>Sent:</b> Thursday, August 13, 2026 9:22 AM<br>
<b>To:</b> labnetwork@mtl.mit.edu <labnetwork@mtl.mit.edu><br>
<b>Subject:</b> Re: [labnetwork] Solvent Bench PPE</div>
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<div style="direction:ltr">Thank you to everyone who responded. This information is very helpful. Reading over the responses has led me to a second question.</div>
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<div style="direction:ltr">Do you use NMP based solvents or PRS-2000 in your wet processes/solvent benches? If so, does this affect the required PPE? I ask because these chemicals have a Health Hazard level 2 and 3 respectively vs level 1 for Acetone and IPA.
Some lab PPE requirements I was sent have qualifiers based on what solvents are used.</div>
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<div style="direction:ltr">Thanks,</div>
<div style="direction:ltr">Katharine</div>
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<div style="direction:ltr">On Tue, Aug 11, 2026 at 8:28 AM Katharine Beach <<a href="mailto:beach@umich.edu" id="OWAeb6b36ab-54f0-b738-3996-691543fd88dd" class="x_OWAAutoLink">beach@umich.edu</a>> wrote:</div>
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<div style="direction:ltr">Greetings,</div>
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<div style="direction:ltr">At the LNF we are evaluating our Solvent Bench PPE requirements. I've been tasked with comparing our current PPE requirements with that of our peers'. If you would be so kind as to share links to this information, or just your requirements that
would be greatly appreciated.</div>
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<div style="direction:ltr">Our current requirements are to wear your safety glasses, these should alway be on in the Cleanroom, and a pair of polychloroprene gloves in addition to the base nitrile gloves.</div>
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<div style="direction:ltr">Thanks you,</div>
<div style="direction:ltr">Katharine Beach</div>
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<p style="direction:ltr; line-height:0px; margin:1px"><span style="font-size:0px; color:rgb(17,85,204)"><a href="https://www.facebook.com/LurieNanofab" id="OWA3eb3c3bb-57b4-7541-b036-0638b8fd9026" class="x_OWAAutoLink" originalsrc="https://www.facebook.com/LurieNanofab" data-auth="NotApplicable" style="color:rgb(17,85,204); margin-top:0px; margin-bottom:0px"><img width="30" height="30" style="width:30px; height:30px; max-width:30px; margin-top:0px; margin-bottom:0px; display:block" src="https://signaturehound.com/api/v1/png/facebook/default/007bff.png"></a></span></p>
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<p style="direction:ltr; line-height:0px; margin:1px"><span style="font-size:0px; color:rgb(17,85,204)"><a href="https://twitter.com/LurieNanoFab" id="OWA8f147922-6884-40d5-12db-e521b23a9360" class="x_OWAAutoLink" originalsrc="https://twitter.com/LurieNanoFab" data-auth="NotApplicable" style="color:rgb(17,85,204); margin-top:0px; margin-bottom:0px"><img width="30" height="30" style="width:30px; height:30px; max-width:30px; margin-top:0px; margin-bottom:0px; display:block" src="https://signaturehound.com/api/v1/png/twitter/default/007bff.png"></a></span></p>
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<p style="direction:ltr; line-height:0px; margin:1px"><span style="font-size:0px; color:rgb(17,85,204)"><a href="https://www.linkedin.com/company/lurie-nanofabrication-facility" id="OWAcae0ea2b-71e7-ca30-eee5-6ca99f0b1cdf" class="x_OWAAutoLink" originalsrc="https://www.linkedin.com/company/lurie-nanofabrication-facility" data-auth="NotApplicable" style="color:rgb(17,85,204); margin-top:0px; margin-bottom:0px"><img width="30" height="30" style="width:30px; height:30px; max-width:30px; margin-top:0px; margin-bottom:0px; display:block" src="https://signaturehound.com/api/v1/png/linkedin/default/007bff.png"></a></span></p>
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