From: "Brown, Kimberly Jean" <kimibush**At_Symbol_Here**EHRS.UPENN.EDU>
Subject: [DCHAS-L] Response from Kimi w/ summary: [DCHAS-L] Acid and Base (glass wash) Bath Containers
Date: Tue, 3 Dec 2019 12:16:32 +0000
Reply-To: ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**PRINCETON.EDU>
Message-ID: 67E52779-A581-41F2-A191-A0708EFDF242**At_Symbol_Here**upenn.edu


Wow, this group never disappoints!

 

Thank you to everyone who took the time to share your experience and suggestions.  We're going to take this into consideration and update our recommendations and requirements for base baths.

 

I tried to summarize the key points below and included our own tips that weren't mentioned elsewhere.

 

Rob Toreki wins the award for fanciest solutions!  (See his full email re: use of a bucket with holes as parts basket inside bath and replacing flammable solvent with tetraglyme or similar)

 

 

OVERVIEW:

 

Penn suggestions not otherwise mentioned:

Acid and Base Baths should be labeled with the OSHA hazard pictogram and contents.  EHRS has templates for the bath labels to use with Avery UltraDuty GHS Chemical Labels 60502. 

Acid Bath Avery Label (60502)

Base Bath Avery Label (60502)

 

 

Kimi Brown

(Kimi Bush) (she, her, hers)

Sr. Lab Safety Specialist

Environmental Health and Radiation Safety

University of Pennsylvania

 

From: ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**PRINCETON.EDU> On Behalf Of Brown, Kimberly Jean
Sent: Monday, December 2, 2019 2:44 PM
To: DCHAS-L**At_Symbol_Here**PRINCETON.EDU
Subject: [DCHAS-L] Acid and Base (glass wash) Bath Containers

 

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

 

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