Kimi,
My research group has used IPA/KOH in plastic buckets as cleaning baths for 30 years without an incident. They can be placed in a Nalgene tub to address potential spills and drips.
It is important to note that these are CLEANING baths. Hence all the contents of the glass reaction flasks should be removed and dealth with properly as the normal part of a reaction workup. Only a minimal amount of residue should be removed in the base bath, so pressurization (due to residues decomposing) is not an issue.
Some research groups use acid baths to treat glassware after it is cleaned in a base bath. So there never would be a pressuriaztiuon issue since there would be no residues.
Best,
Craig
Craig A. Merlic
Professor of Chemistry, UCLA Department of Chemistry and Biochemistry
Executive Director , UC Center for Laboratory Safety
Los Angeles, CA 90095-1569
Voice: 310-825-5466
From: ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**PRINCETON.EDU> on behalf of "Jeffrey Your, CSMM" <00000506835eb4f7-dmarc-request**At_Symbol_Here**LISTS.PRINCETON.EDU>
Reply-To: ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**PRINCETON.EDU>
Date: Monday, December 2, 2019 at 12:48 PM
To: <DCHAS-L**At_Symbol_Here**PRINCETON.EDU>
Subject: Re: [DCHAS-L] Acid and Base (glass wash) Bath Containers
Kimi,
I use a five gallon pail with a screw top for our KOH IPA base bath. Pressurization has not been a problem over the years.
On Mon, Dec 2, 2019 at 2:52 PM Brown, Kimberly Jean <kimibush**At_Symbol_Here**ehrs.upenn.edu> wrote:
Hello, and Happy December!
Have any of you issued (or been subject to) specific guidance regarding lab-scale acid and bath baths for glassware cleaning?
After some recent spills, we evaluated the types of containers being used for acid and base baths in our labs. Some groups are using 5-gallon buckets with poorly fitting lids, which is what led to the spills. In updating our recommendations, however, we questioned whether or not the lids should be tight-fitting (liquid/gas tight) due to the potential for pressurization.
Ultimately, we recommended a product such as this: https://www.calpaclab.com/nalgene-rectangular-tank-with-cover-pp-7-gal-12x12x12/ng-14200-0010# (Which more than a few groups resisted/rejected for a variety of reasons).
A researcher argued that there is no potential for pressurization of a base bath (e.g. KOH and IPA) during glassware soaking, and therefore, a bucket with a screw top lid should still be an acceptable option.
Thoughts? Is there a potential for pressurization of the base bath? What requirements, if any, do you have for this?
Thanks for sharing your experiences and opinions!
Kimi Brown
(Kimi Bush) (she, her, hers)
Sr. Lab Safety Specialist
Environmental Health and Radiation Safety
University of Pennsylvania
3160 Chestnut St., Suite 400
Philadelphia, PA 19104-6287
Office: 215-746-6549
Voice/cell/text: 215-651-0557
fax: 215-898-0140
--- For more information about the DCHAS-L e-mail list, contact the Divisional membership chair at membership**At_Symbol_Here**dchas.org Follow us on Twitter **At_Symbol_Here**acsdchas
--
Jeff
Jeffrey A. Your, M.B.A., C.S.M.M. - Science Buyer
Manager, Central Scientific Stores and Laboratory Support Services
Chair, University Sustainability Committee
John Carroll University
1 John Carroll Boulevard
University Hts, Ohio 44118-4538
216.397.4244 work 216.397.1803 fax 216.496.7594 cell
https://www.instagram.com/jcuchem/ https://www.facebook.com/jcuchemistry/
--- For more information about the DCHAS-L e-mail list, contact the Divisional membership chair at membership**At_Symbol_Here**dchas.org Follow us on Twitter **At_Symbol_Here**acsdchas
Previous post | Top of Page | Next post